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Universidade do Rio Grande do Norte
1.
Hilário, Larissa Sobral.
Avaliação da fibra calotropis procera modificada para remoção de petróleo na superfície da água
.
Degree: 2019, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/28484 
► Biossorbents have been highlighted as an alternative method to removal of contaminants from spills or leaks of oil and its derivatives, once that they are…
(more)
▼ Biossorbents have been highlighted as an alternative method to removal of
contaminants from spills or leaks of oil and its derivatives, once that they are
biodegradable, are highly available, low cost and have a good sorption capacity. Thus,
the objective of this work was to evaluate the sorption capacity of the Calotropis
procera (CP) fiber in natura state, as well as, to treated sodium chloride (CPNaCl),
sodium hydroxide (CPNaOH), sodium chlorite (CPNaClO2) and thermal in water (CPTA),
followed by heat treatment, for use as biossorbent of material for crude oil cleaning,
removal and recovery. Initially, a thermogravimetric analysis is performed to identify
the degradation temperature of the fiber, thus, a CP intended to be treated at
temperatures of 150 °C and 200 °C for time 1h, 2h and 3h. Fiber structures were
investigated and compared using Fourier transform infrared spectroscopy (FTIR) and
field emission scanning electron microscopy (SEM-FEG). The sorption capacity test
results indicated better results when the fibers were 1440min in contact with crude oil.
The CP in- natura achieves sorption capacity of about 75 times or its own weight (76.32
g/g), in addition, an increase in sorption was observed for all treated fibers, being a
CPTNaOH200°C1h that reached the best values of sorption 127.77g/g and 192.67g/g, dried
and selected. After the validation, study of the selected variables CPTNaOH200°C1h the
most desirable for both dry and less difficult systems, converging the real result and the
predicted for the following oil sorption maximization conditions. The CPTNaOH200°C1h
fiber and as more fibers demonstrate high sorption performance can be used in the
future as promising alternatives for intermediate oil crude removal in liquids and water
surface leaks, given its good oil / water selectivity, hydrophobicity, oleophility, high
availability and excellent oil sorption property.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor).
Subjects/Keywords: Calotropis procera;
Sorção;
Petróleo
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APA (6th Edition):
Hilário, L. S. (2019). Avaliação da fibra calotropis procera modificada para remoção de petróleo na superfície da água
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/28484
Chicago Manual of Style (16th Edition):
Hilário, Larissa Sobral. “Avaliação da fibra calotropis procera modificada para remoção de petróleo na superfície da água
.” 2019. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/28484.
MLA Handbook (7th Edition):
Hilário, Larissa Sobral. “Avaliação da fibra calotropis procera modificada para remoção de petróleo na superfície da água
.” 2019. Web. 07 Mar 2021.
Vancouver:
Hilário LS. Avaliação da fibra calotropis procera modificada para remoção de petróleo na superfície da água
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2019. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/28484.
Council of Science Editors:
Hilário LS. Avaliação da fibra calotropis procera modificada para remoção de petróleo na superfície da água
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2019. Available from: http://repositorio.ufrn.br/handle/123456789/28484
Universidade do Rio Grande do Norte
2.
Machado, Shirley Feitosa.
Utilização da estatística multivariada no estudo da contribuição de cada zona-reservatório no volume de água produzida em um campo de petróleo da bacia potiguar - Brasil
.
Degree: 2016, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/28632
► Oil fields when they reach their maturation are common the decay of the production of hydrocarbons being necessary, the opening of new producing zones. Eat…
(more)
▼ Oil fields when they reach their maturation are common the decay of the production of
hydrocarbons being necessary, the opening of new producing zones. Eat the opening of these
new zones, increase water production, and it becomes increasingly difficult to identify which
zone is responsible for most of the volume of water produced. The cost for this identification
is high because it is expensive operations that require expensive probes and special
equipment. According to this panorama, this work aims at the study and the application of the
discriminant analysis in the identification of standard signatures of each producing zones and
the development of graphical tools that help in estimating the contribution of each producing
zone in the volume of water produced in wells that produce in more than one zone at the same
time. The ion chromatography was the proposed methodology for the quantification of the
ions present in the samples, which was validated for the analysis of major cations and anions
simultaneously. The data obtained presented satisfactory values for the figures of merit, such
as precision, selectivity, linearity among others. Through the discriminant analysis it was
possible to obtain a function that distinguishes chemically the production zones, and from
experiments with mixtures of predefined proportions, it was possible to develop mathematical
models and graphical tools to estimate the contribution of the zones in the wells that produce
in more than one zone simultaneously.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor).
Subjects/Keywords: Água produzida;
Análise discriminante;
Campos de petróleo;
Cromatografia de íons
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APA (6th Edition):
Machado, S. F. (2016). Utilização da estatística multivariada no estudo da contribuição de cada zona-reservatório no volume de água produzida em um campo de petróleo da bacia potiguar - Brasil
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/28632
Chicago Manual of Style (16th Edition):
Machado, Shirley Feitosa. “Utilização da estatística multivariada no estudo da contribuição de cada zona-reservatório no volume de água produzida em um campo de petróleo da bacia potiguar - Brasil
.” 2016. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/28632.
MLA Handbook (7th Edition):
Machado, Shirley Feitosa. “Utilização da estatística multivariada no estudo da contribuição de cada zona-reservatório no volume de água produzida em um campo de petróleo da bacia potiguar - Brasil
.” 2016. Web. 07 Mar 2021.
Vancouver:
Machado SF. Utilização da estatística multivariada no estudo da contribuição de cada zona-reservatório no volume de água produzida em um campo de petróleo da bacia potiguar - Brasil
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2016. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/28632.
Council of Science Editors:
Machado SF. Utilização da estatística multivariada no estudo da contribuição de cada zona-reservatório no volume de água produzida em um campo de petróleo da bacia potiguar - Brasil
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2016. Available from: http://repositorio.ufrn.br/handle/123456789/28632
Universidade do Rio Grande do Norte
3.
Araújo, Nayonara Karolynne Costa de.
Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
.
Degree: 2016, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/21100
► Contamination of groundwater by BTX has been featured in recent decades. This type of contamination is due to small and continuous leaks at gas stations,…
(more)
▼ Contamination of groundwater by BTX has been featured in recent decades. This type of contamination is due to small and continuous leaks at gas stations, causing serious problems to public health and the environment. Based on these antecedents, the search for new alternatives for treating contaminated water is shown to be essential. Therefore, this study aimed to evaluate the efficiency of removal of BTX by adsorption processes employing commercial alumina (Al2O3) and alumina supported with iron (Fe/Al2O3) as adsorbents. It was prepared by a in a synthetic gasoline solution and distilled water to simulate an actual sample. Initially, the adsorbents were characterized by techniques XRD, TG / DTG, XRF, FTIR and SEM/EDS, several trials, where he was placed synthetic solution to react in the presence of Al2O3 and Fe/Al2O3 in a closed, mechanical stirring system were performed varying the catalyst concentration 2, 4 and 6 g.L-1 every 0, 10, 30 60, 90 and 120 min, aliquots were taken and brought to analysis by gas chromatography flame ionization with headspace extraction. The results indicated that the absorbent which has higher BTX removal capacity was the Fe/Al2O3 at a concentration of 6 g.L-1, pH = 4 and time of 90 minutes reaction, resulting in an efficiency, resulting in a 86,5% efficiency for benzene removal, for the 95,4% toluene, 90,8% for ɱ,ρ- xylene and 93.7% for the θ-xylenes. Subsequently, we performed a kinetic study of the reactions, the values of experimental adsorption capacity (qe) showed agreement with the values of the theoretical adsorption capacity (qc) to the pseudo-second-order model in the adsorption tests using 2 and 6 gL-1 of Al2O3 and assays using 2, 4 and 6 g.L-1 of Fe/Al2O3. A fact corroborated by the R2 values, thus indicating that the chemical interactions are present in the adsorption mechanisms of BTX.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Adsorção;
Alumina;
BTX;
Tratamento de água
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APA (6th Edition):
Araújo, N. K. C. d. (2016). Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/21100
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Araújo, Nayonara Karolynne Costa de. “Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
.” 2016. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/21100.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Araújo, Nayonara Karolynne Costa de. “Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
.” 2016. Web. 07 Mar 2021.
Vancouver:
Araújo NKCd. Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2016. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/21100.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Araújo NKCd. Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
. [Thesis]. Universidade do Rio Grande do Norte; 2016. Available from: http://repositorio.ufrn.br/handle/123456789/21100
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
4.
Dantas, Aécia Seleide.
Proposta de modelo de IQA visando o monitoramento de águas subterrâneas contaminadas por hidrocarbonetos
.
Degree: 2015, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/21541
► The soil and groundwater contamination through the leakage of underground fuel storage systems at resale points has been a major concern in recent decades. Fuel…
(more)
▼ The soil and groundwater contamination through the leakage of underground fuel storage systems at resale points has been a major concern in recent decades. Fuel leaks in soil does not always reach the aquifer to form a free phase, which presents itself as an emergency situation. When the leak has not reached large proportions, a parked phase of fuel is formed on the ground that releases vapors that expand and come into
contact with the aquifer, contaminating it, and forming what is called the dissolved
phase. This vapor is composed of short and light hydrocarbon chains; among them we
have benzene which is very toxic. The light hydrocarbons are able to solubilize in
water, making it impractical for human consumption. This thesis deals with the
quarterly monitoring of benzene in wells of a fuel retail station in the city of Natal-RN,
which uses the pumping and treatment remediation type of system. The initial
maximum dissolved benzene plume concentration was 3.107,80 μg.L-1, and during
treatment, it showed variations of concentrations above and below this value, having
these concentrations higher than the provisions of CONAMA Resolution No. 420/09
of 5 μg.L-1.In addition, this thesis proposed a Quality Index model for Groundwater
contaminated by petroleum hidrocarbons (WQIGPH), seeking the interaction of 15
parameters (BTEX, TPH and full PAH) and the carcinogenic and toxicological
potential (IARC), so to contribute to decision making and measures aimed for
groundwater quality management.When the WQIGPH indicates groundwater of
excellent quality for public supply, the population will be assured that the toxicity and
carcinogenicity by hydrocarbons will be within the limits set by applicable laws,
preserving the health of the population.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Monitoramento;
Benzeno;
Índice de qualidade de água
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APA ·
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Manager
APA (6th Edition):
Dantas, A. S. (2015). Proposta de modelo de IQA visando o monitoramento de águas subterrâneas contaminadas por hidrocarbonetos
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/21541
Chicago Manual of Style (16th Edition):
Dantas, Aécia Seleide. “Proposta de modelo de IQA visando o monitoramento de águas subterrâneas contaminadas por hidrocarbonetos
.” 2015. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/21541.
MLA Handbook (7th Edition):
Dantas, Aécia Seleide. “Proposta de modelo de IQA visando o monitoramento de águas subterrâneas contaminadas por hidrocarbonetos
.” 2015. Web. 07 Mar 2021.
Vancouver:
Dantas AS. Proposta de modelo de IQA visando o monitoramento de águas subterrâneas contaminadas por hidrocarbonetos
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2015. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/21541.
Council of Science Editors:
Dantas AS. Proposta de modelo de IQA visando o monitoramento de águas subterrâneas contaminadas por hidrocarbonetos
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2015. Available from: http://repositorio.ufrn.br/handle/123456789/21541
Universidade do Rio Grande do Norte
5.
Menezes, Yasmin Maria da Silva.
Remoção de HPA em água produzida utilizando sistema microemulsionado
.
Degree: 2017, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/23879
► Produced water is the largest volume of disposal fluids generated during the production and processing of petroleum and natural gas and its composition can contain…
(more)
▼ Produced water is the largest volume of disposal fluids generated during the production and processing of petroleum and natural gas and its composition can contain several toxic compounds, among them are the polycyclic aromatic hydrocarbons (PAH), whose presence causes harmful effects to the environment. This paper discusses a study on the removal of 15 PAH in produced water using a microemulsion system. For this, it was developed a pseudo-ternary phase diagram consisting of produced water enriched with PAH, as the aqueous phase (AP), n-hexane as oily phase (OP) and n-butanol and CTAB as cosurfactant (C) and surfactant (T), respectively, to a right C/T = 4. From the diagram's construction was chosen a spot with a high percentage of AP to test the treatment in the region of interest, Winsor II (WII). This spot (90% AP, 5%C/T and 5% OP) was evaluated in two ways: using a precursor of microemulsion formation only with the AP and the active matter and microemulsion formed at that point, by adding the OP. The qualitative assessment, carried out by means of fluorescence spectroscopy, showed that there was water treatment for both methods, however, the quantitative assessment, carried out by means of high performance liquid chromatography with fluorescence detector (HPLC-FLD), showed that extraction using microemulsion was more efficient. With that, it was performed an simplex centroid experimental planning for the study of the influence of the phases and, thus, it was possible to identify the best point of extraction. The samples were analyzed by HPLC-FLD and its results showed that each PAH presented a different response surface, but all of them showed a maximum extraction at the point with microemulsion composition of 90% AP, 5% C/T and 5% OP. This result shows that this technique is promising for the treatment of produced water in removing HPA, constituting an alternative to the treatment of this reject.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Água produzida;
HPA;
Microemulsões;
Tensoativo
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APA (6th Edition):
Menezes, Y. M. d. S. (2017). Remoção de HPA em água produzida utilizando sistema microemulsionado
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/23879
Chicago Manual of Style (16th Edition):
Menezes, Yasmin Maria da Silva. “Remoção de HPA em água produzida utilizando sistema microemulsionado
.” 2017. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/23879.
MLA Handbook (7th Edition):
Menezes, Yasmin Maria da Silva. “Remoção de HPA em água produzida utilizando sistema microemulsionado
.” 2017. Web. 07 Mar 2021.
Vancouver:
Menezes YMdS. Remoção de HPA em água produzida utilizando sistema microemulsionado
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2017. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/23879.
Council of Science Editors:
Menezes YMdS. Remoção de HPA em água produzida utilizando sistema microemulsionado
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/23879
Universidade do Rio Grande do Norte
6.
Oliveira, Izabel Kaline da Silva.
Desenvolvimento de método para determinação de cloro em petróleo via molécula MgCl por HR-CS MAS
.
Degree: 2017, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/24674
► Chloride is considered an important contaminant of petroleum as it interferes with the process of transportation and refining and can be transferred to the final…
(more)
▼ Chloride is considered an important contaminant of petroleum as it interferes with the process of transportation and refining and can be transferred to the final product derivatives. During refining, the presence of chloride may lead to the formation of HCl, causing serious corrosion problems. A methodology for the determination of chlorine in petroleum samples prepared by emulsions was developed by high resolution molecular absorption spectrometry with continuum source through the diatomic molecule MgCl, in the wavelength 377.01 nm. The preparation of the emulsion was optimized through centroid-simplex design. The conditions of preparation of the emulsions were: 0.5 mL of 5% (v / v) HNO3, 0.5 mL of xylene and 2 mL of a mixture of n-Propanol / Triton X-100 solvents in the ratio 5:1. The crude oil mass used was about 0.20 g. Magnesium was used as the precursor of the molecule, the optimized concentration was 10 g L-1. The proportional studies between Mg and Cl for the formation of molecules show that to ensure the formation of a MgCl molecule is required for a mass ratio of at least 500 Mg: 1 Cl. A mass of 5 μg of Pd was introduced at each cycle that chemical modifier for increase the thermal stability of the molecular species. The optimized pyrolysis and vaporization temperatures were 800 ° C and 2300 ° C, respectively. For chlorine analysis, eight crude oil samples from the Potiguar Basin and two certified reference materials, lubricated oil (NIST 1848) and fuel oil (NIST 1634c) were used, to verify the accuracy of the method. The calibration strategy against aqueous standards was possible, obtaining the LOD of 5 mg kg-1. Addition / recovery tests were performed and the values obtained were between 92 and 117%, values acceptable analytically. The proposed methodology is simple, fast with simplified sample preparation.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Cloro;
Petróleo;
Emulsão;
Molécula MgCl;
HR-CS MAS
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APA ·
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APA (6th Edition):
Oliveira, I. K. d. S. (2017). Desenvolvimento de método para determinação de cloro em petróleo via molécula MgCl por HR-CS MAS
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/24674
Chicago Manual of Style (16th Edition):
Oliveira, Izabel Kaline da Silva. “Desenvolvimento de método para determinação de cloro em petróleo via molécula MgCl por HR-CS MAS
.” 2017. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/24674.
MLA Handbook (7th Edition):
Oliveira, Izabel Kaline da Silva. “Desenvolvimento de método para determinação de cloro em petróleo via molécula MgCl por HR-CS MAS
.” 2017. Web. 07 Mar 2021.
Vancouver:
Oliveira IKdS. Desenvolvimento de método para determinação de cloro em petróleo via molécula MgCl por HR-CS MAS
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2017. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/24674.
Council of Science Editors:
Oliveira IKdS. Desenvolvimento de método para determinação de cloro em petróleo via molécula MgCl por HR-CS MAS
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/24674
Universidade do Rio Grande do Norte
7.
Neri, Renaly dos Santos.
Avaliação da eficiência da espécie vegetal ouratea parviflora como inibidor de corrosão em aço carbono
.
Degree: 2018, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/25530
► The impacts of corrosion are frequent and occur in various activities. There are several ways of combating impacts, among them the use of micro-emulsified system…
(more)
▼ The impacts of corrosion are frequent and occur in various activities. There are several
ways of combating impacts, among them the use of micro-emulsified system have been
targeted as corrosion inhibitors. Although they are effective in the corrosion control, some
have high cost and are toxic to the environment, making its use questionable. In order to
fulfill the growing demand for corrosion inhibitors, the objective of the present work was to
perform a research about the inhibitory action of almonds oil and hydro-alcoholic extract from
vegetal specie Ouratea parviflora. The extract was evaluated in free formand in a microemulsified
system, containing the oil of the almonds in your composition, with different
concentrations, regarding the corrosion inhibition efficiency into a saline medium (NaCl
3.5%). Was used the method Linear Polarization Resistance method, also determining the
behavior and the isotherm of the metal/inhibitor adsorption process. According to the
obtained results, the maximum inhibition efficiencies were observed at 67.70% (12.5 ppm),
77.94% (200 ppm) and 85.66% (200 ppm) to the free hydro-alcoholic extract, saline microemulsified
system (SME-S) and saline micro-emulsified system with extract (SME-S-EB),
respectively. In addition, all the experimental data from the adsorption process fitted the
Langmuir isotherm. According to the data calculated from Gibbs free energy, it was detected
a spontaneity of the adsorbent inhibitors used in different conditions on the steel surface. The
study of getting of inhibitors used in different conditions under the sustainability bias
confirmed that these formulations can be considered as sustainable. The results showed that
the hydro-alcoholic extract of Ouratea parviflora evaluated in free form and in a
microemulsion system containing the oil of the almonds of the same plant species, can be
used as alternative sources in the formulation of corrosion inhibitors.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Corrosão;
Inibidor;
Microemulsões;
Extrato;
Ouratea parviflora
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APA (6th Edition):
Neri, R. d. S. (2018). Avaliação da eficiência da espécie vegetal ouratea parviflora como inibidor de corrosão em aço carbono
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/25530
Chicago Manual of Style (16th Edition):
Neri, Renaly dos Santos. “Avaliação da eficiência da espécie vegetal ouratea parviflora como inibidor de corrosão em aço carbono
.” 2018. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/25530.
MLA Handbook (7th Edition):
Neri, Renaly dos Santos. “Avaliação da eficiência da espécie vegetal ouratea parviflora como inibidor de corrosão em aço carbono
.” 2018. Web. 07 Mar 2021.
Vancouver:
Neri RdS. Avaliação da eficiência da espécie vegetal ouratea parviflora como inibidor de corrosão em aço carbono
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2018. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/25530.
Council of Science Editors:
Neri RdS. Avaliação da eficiência da espécie vegetal ouratea parviflora como inibidor de corrosão em aço carbono
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2018. Available from: http://repositorio.ufrn.br/handle/123456789/25530
Universidade do Rio Grande do Norte
8.
Galvão, Evelyne Nunes de Oliveira.
Avaliação da remediação de fase livre em um empreendimento de revenda de combustíveis
.
Degree: 2018, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/25699
► The activities involving the management of petroleum origin fuels are inherent to serious environmental risks when associated with the contact of these products with the…
(more)
▼ The activities involving the management of petroleum origin fuels are inherent to serious
environmental risks when associated with the contact of these products with the environment
by any means of entry, including cracks presents in underground storage tanks for liquid fuels
at gas stations. The present research has the objective of evaluate the Environmental Passive
Investigation carried out at a gas station in the city of Natal (RN), from which the free phase
thicknesses were evaluated in the monitoring wells as a function of pluviometrics indices of the
region and the remediation systems applied by signing a adjustment conduct term between the
entrepreneur and the public ministry, with the purpose of correcting the environmental
liabilities arising from the activities developed by the enterprise. The study area showed
persistence of free phase along 18 consecutive months, during which time a positive response
to the applied remediation technology was associated with the Multiphase Extraction and a
coherent relationship was established between the free phase thickness measured with the
seasonal variation of rainfall, which assumed an inverse proportional relationship. In these
terms, could be assessed that rainfall is a factor that interferes with remediation. The resurgent
free phase detected in 2015 after the remediation work stoppage was associated with possible
new contamination sources or logistical failures in which the last free phase measurements were
given at the end of 2013. After 29 months of remediation in which pumping was carried out,
was verified a fuel recovery product in the order of 2,469.79 liters, conferring the importance
of environmental liabilities in the environment quality preservation proposing effective
mechanisms in the remediation of the impacts caused by economic activities developed at social
environment.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Passivo ambiental;
Postos revendedores de combustíveis;
Fase livre;
Remediação
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APA (6th Edition):
Galvão, E. N. d. O. (2018). Avaliação da remediação de fase livre em um empreendimento de revenda de combustíveis
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/25699
Chicago Manual of Style (16th Edition):
Galvão, Evelyne Nunes de Oliveira. “Avaliação da remediação de fase livre em um empreendimento de revenda de combustíveis
.” 2018. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/25699.
MLA Handbook (7th Edition):
Galvão, Evelyne Nunes de Oliveira. “Avaliação da remediação de fase livre em um empreendimento de revenda de combustíveis
.” 2018. Web. 07 Mar 2021.
Vancouver:
Galvão ENdO. Avaliação da remediação de fase livre em um empreendimento de revenda de combustíveis
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2018. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/25699.
Council of Science Editors:
Galvão ENdO. Avaliação da remediação de fase livre em um empreendimento de revenda de combustíveis
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2018. Available from: http://repositorio.ufrn.br/handle/123456789/25699
Universidade do Rio Grande do Norte
9.
Santana, Jildimara de Jesus.
Avaliação da bioacumulação de metais tóxicos em ostras, em condições simuladas do descarte da água produzida no mar
.
Degree: 2018, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/26314
► The Produced Water (PW) is one of the oil industry main problems due to its large production volume and high complexity. To carry out its…
(more)
▼ The Produced Water (PW) is one of the oil industry main problems due to its large
production volume and high complexity. To carry out its disposal in marine
environments it is necessary the removal of toxic substances present in the environment,
among these substances are metals. Metals when present in the aquatic environment,
even at low concentrations, are capable to provocate bioaccumulating in organisms,
mainly the filter bivalve molluscs, such as oysters. The present study aimed to evaluate
the metal quantification in bivalve molluscs (Crassostrea brasiliana), which serve as
marine's waters contamination bioindicators by metals. For this purpose, it was
simulated a real produced water discard from the Potiguar Basin, using distinct
concentrations in sea water from the Areia Preta / RN beach. The physical-chemical
parameters of the water, such as pH, temperature, salinity, dissolved oxygen, total
dissolved solids and conductivity were evaluated daily, as well as the tissue of oysters
exposed to this citaded conditions. In order to determine the metals Cadmium, Cobalt,
Copper, Nickel and Lead, the samples were decomposed with a closed system assisted
by microwave radiation using Inductively Coupled Plasma Optical Emission
Spectrometry (ICP-OES) for quantification. A decrease in the concentration of all
metals in water over time was observed, as expected, according to evidenced by their
absorption by oysters. In an environment with higher water content, this absorption is
limited. In aquaria containing the highest concentration of produced water, survival was
only 70 hours. It was also observed that with a lower concentration of PW and metals in
the medium, higher was removal's rate. The results obtained after oyster analysis
showed that how lower metal's concentration in water, greater the oysters absorption
potential. Therefore, it is concluded that oyster exposure tests in front of the produced
water show that these can function as indicative species for contamination of aquatic
environments and Inductively Coupled Plasma Optical Emission Spectrometry
technique was efficient in determination of metals in the studied matrixes, showing
good linearity (r2>0.998 for all metals determined with DPR <5%) and quantification
limits between 0.0003 and 0.0045 mg L-1.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor).
Subjects/Keywords: Ostras;
Metais;
ICP OES;
Água produzida
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Santana, J. d. J. (2018). Avaliação da bioacumulação de metais tóxicos em ostras, em condições simuladas do descarte da água produzida no mar
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/26314
Chicago Manual of Style (16th Edition):
Santana, Jildimara de Jesus. “Avaliação da bioacumulação de metais tóxicos em ostras, em condições simuladas do descarte da água produzida no mar
.” 2018. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/26314.
MLA Handbook (7th Edition):
Santana, Jildimara de Jesus. “Avaliação da bioacumulação de metais tóxicos em ostras, em condições simuladas do descarte da água produzida no mar
.” 2018. Web. 07 Mar 2021.
Vancouver:
Santana JdJ. Avaliação da bioacumulação de metais tóxicos em ostras, em condições simuladas do descarte da água produzida no mar
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2018. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/26314.
Council of Science Editors:
Santana JdJ. Avaliação da bioacumulação de metais tóxicos em ostras, em condições simuladas do descarte da água produzida no mar
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2018. Available from: http://repositorio.ufrn.br/handle/123456789/26314
Universidade do Rio Grande do Norte
10.
Ramalho, Adriana Margarida Zanbotto.
Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
.
Degree: 2013, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/13028
► Activities that have fuel subterranean storage system are considered potentially polluting fuels by CONAMA Resolution 273, due to the possibility of leak, outpouring and overflow…
(more)
▼ Activities that have fuel subterranean storage system are considered potentially
polluting fuels by CONAMA Resolution 273, due to the possibility of leak, outpouring
and overflow of fuel into the ground. Being even more worrying when contaminate
groundwater for public supply, as the case of Natal City. For this reason, the Public
Ministry/RN, in partnership with UFRN, developed the project environmental
suitability of Gas stations in Natal, of which 36% showed evidence of contamination.
This paper describes the four stages of the management of contaminated areas:
preliminary assessment of environmental liabilities, detailed confirmatory investigation
of the contamination, risk analysis to human health (RBCA), as well as the remediation
plan of degraded areas. Therefore it is presented a case study. For the area investigated
has been proposed a mathematical method to estimate the volume of LNAPL by a free
CAD software (ScketchUp) and compare it with the partition method for grid area.
Were also performed 3D graphics designs of feathers contamination. Research results
showed that passive benzene contamination in groundwater was 2791.77 μg/L, when
the maximum allowed by CONAMA Resolution 420 is 5 μg/L which is the potability
standards. The individual and cumulative risks were calculated from 4.4 x10-3, both
above the limits of 1.0 x10-5 or by RBCA 1.0 x10-6 by the Public Ministry/RN.
Corrective action points that remediation of dissolved phase benzene is expected to
reach a concentration of 25 μg/L, based on carcinogenic risk for ingestion of
groundwater by residents residential, diverging legislation. According to the proposed
model, the volume of LNAPL using the ScketchUp was 17.59 m3, while by the grid
partitioning method was 14.02 m3. Because of the low recovery, the expected removal
of LNAPL is 11 years, if the multiphase extraction system installed in the enterprise is
not optimized
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Poluição ambiental. Áreas contaminadas. Postos revendedores de combustíveis. Saúde humana. Análise de risco. Passivo ambiental;
Contaminated areas. Fuel stations. Environmental liability. Human ealth risk analysis. RBCA. Remediation. LNAPL.
Record Details
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Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ramalho, A. M. Z. (2013). Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/13028
Chicago Manual of Style (16th Edition):
Ramalho, Adriana Margarida Zanbotto. “Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
.” 2013. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/13028.
MLA Handbook (7th Edition):
Ramalho, Adriana Margarida Zanbotto. “Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
.” 2013. Web. 07 Mar 2021.
Vancouver:
Ramalho AMZ. Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2013. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/13028.
Council of Science Editors:
Ramalho AMZ. Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2013. Available from: http://repositorio.ufrn.br/handle/123456789/13028
Universidade do Rio Grande do Norte
11.
Sena, Shirley Feitosa Machado.
Estudos hidroquímicos da água produzida de um determinado campo de petróleo da bacia potiguar
.
Degree: 2011, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12950
► Waste generated during the exploration and production of oil, water stands out due to various factors including the volume generated, the salt content, the presence…
(more)
▼ Waste generated during the exploration and production of oil, water stands out
due to various factors including the volume generated, the salt content, the presence of oil
and chemicals and the water associated with oil is called produced water. The chemical
composition of water is complex and depends strongly on the field generator, because it
was in contact with the geological formation for thousands of years. This work aims to
characterize the hydrochemical water produced in different areas of a field located in the
Potiguar Basin. We collected 27 samples from 06 zones (400, 600, 400/600, 400/450/500,
350/400, A) the producing field called S and measured 50 required parameter divided
between physical and chemical parameters, cations and anions. In hydrochemical
characterization was used as tools of reasons ionic calculations, diagrams and they
hydrochemical classification diagram Piper and Stiff diagram and also the statistic that
helped in the identification of signature patterns for each production area including the
area that supplies water injected this field for secondary oil recovery. The ionic balance
error was calculated to assess the quality of the results of the analysis that was considered
good, because 89% of the samples were below 5% error. Hydrochemical diagrams
classified the waters as sodium chloride, with the exception of samples from Area A,
from the injection well, which were classified as sodium bicarbonate. Through
descriptive analysis and discriminant analysis was possible to obtain a function that
differs chemically production areas, this function had a good hit rate of classification was
85%
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Água produzida;
Hidroquímica;
Análise discriminante;
Bacia
potiguar;
Zonas-Reservatório;
Produced Water;
Hydrochemistry;
Discriminant Analysis;
Potiguar Basin;
Reservoir zones
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sena, S. F. M. (2011). Estudos hidroquímicos da água produzida de um determinado campo de petróleo da bacia potiguar
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12950
Chicago Manual of Style (16th Edition):
Sena, Shirley Feitosa Machado. “Estudos hidroquímicos da água produzida de um determinado campo de petróleo da bacia potiguar
.” 2011. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12950.
MLA Handbook (7th Edition):
Sena, Shirley Feitosa Machado. “Estudos hidroquímicos da água produzida de um determinado campo de petróleo da bacia potiguar
.” 2011. Web. 07 Mar 2021.
Vancouver:
Sena SFM. Estudos hidroquímicos da água produzida de um determinado campo de petróleo da bacia potiguar
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2011. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12950.
Council of Science Editors:
Sena SFM. Estudos hidroquímicos da água produzida de um determinado campo de petróleo da bacia potiguar
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2011. Available from: http://repositorio.ufrn.br/handle/123456789/12950
Universidade do Rio Grande do Norte
12.
Ramalho, Adriana Margarida Zanbotto.
Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
.
Degree: 2013, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/13028
► Activities that have fuel subterranean storage system are considered potentially polluting fuels by CONAMA Resolution 273, due to the possibility of leak, outpouring and overflow…
(more)
▼ Activities that have fuel subterranean storage system are considered potentially
polluting fuels by CONAMA Resolution 273, due to the possibility of leak, outpouring
and overflow of fuel into the ground. Being even more worrying when contaminate
groundwater for public supply, as the case of Natal City. For this reason, the Public
Ministry/RN, in partnership with UFRN, developed the project environmental
suitability of Gas stations in Natal, of which 36% showed evidence of contamination.
This paper describes the four stages of the management of contaminated areas:
preliminary assessment of environmental liabilities, detailed confirmatory investigation
of the contamination, risk analysis to human health (RBCA), as well as the remediation
plan of degraded areas. Therefore it is presented a case study. For the area investigated
has been proposed a mathematical method to estimate the volume of LNAPL by a free
CAD software (ScketchUp) and compare it with the partition method for grid area.
Were also performed 3D graphics designs of feathers contamination. Research results
showed that passive benzene contamination in groundwater was 2791.77 μg/L, when
the maximum allowed by CONAMA Resolution 420 is 5 μg/L which is the potability
standards. The individual and cumulative risks were calculated from 4.4 x10-3, both
above the limits of 1.0 x10-5 or by RBCA 1.0 x10-6 by the Public Ministry/RN.
Corrective action points that remediation of dissolved phase benzene is expected to
reach a concentration of 25 μg/L, based on carcinogenic risk for ingestion of
groundwater by residents residential, diverging legislation. According to the proposed
model, the volume of LNAPL using the ScketchUp was 17.59 m3, while by the grid
partitioning method was 14.02 m3. Because of the low recovery, the expected removal
of LNAPL is 11 years, if the multiphase extraction system installed in the enterprise is
not optimized
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Poluição ambiental. Áreas contaminadas. Postos revendedores de combustíveis. Saúde humana. Análise de risco. Passivo ambiental;
Contaminated areas. Fuel stations. Environmental liability. Human ealth risk analysis. RBCA. Remediation. LNAPL.
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ramalho, A. M. Z. (2013). Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/13028
Chicago Manual of Style (16th Edition):
Ramalho, Adriana Margarida Zanbotto. “Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
.” 2013. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/13028.
MLA Handbook (7th Edition):
Ramalho, Adriana Margarida Zanbotto. “Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
.” 2013. Web. 07 Mar 2021.
Vancouver:
Ramalho AMZ. Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2013. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/13028.
Council of Science Editors:
Ramalho AMZ. Investigação e gerenciamento de áreas contaminadas por postos revendedores de combustíveis em Natal
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2013. Available from: http://repositorio.ufrn.br/handle/123456789/13028
Universidade do Rio Grande do Norte
13.
Cunha, Jardel Dantas da.
Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
.
Degree: 2012, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/13027
► The resistance of aluminum and their alloys, to the corrosion phenomenon, in aqueous solutions, is a result of the oxide layer formed. However, the corrosion…
(more)
▼ The resistance of aluminum and their alloys, to the corrosion phenomenon, in aqueous solutions,
is a result of the oxide layer formed. However, the corrosion process in the aluminum alloy is
associated with the presence a second phase of particles or the presence of chloride ions which
promote the disruption of the oxide layer located producing the corrosion process. On the other
hand, the term water produced is used to describe the water after the separation of the oil and gas
in API separators. The volumes of produced water arrive around 5 more times to the volume of
oil produced. The greatest feature of the water is the presence of numerous pollutants. Due to the
increased volume of waste around the world in the current decade, the outcome and the effect of
the discharge of produced water on the environment has recently become an important issue of
environmental concern where numerous treatments are aimed at reducing these contaminants
before disposal. Then, this study aims to investigate the electrochemical corrosion behavior of
aluminum alloy 6060 in presence of water produced and the influence of organic components as
well as chloride ions, by using the electrochemical techniques of linear polarization. The
modification of the passive layer and the likely breakpoints were observed by atomic force
microscopy (AFM). In the pit formation potential around -0.4 to -0.8 V/EAg/AgCl was observed that
the diffusion of chloride ions occurs via the layer formed with the probable formation of pits.
Whereas, at temperatures above 65 °C, it was observed that the range of potential for thepit
formation was -0.4 to -0.5 V/EAg/AgCl. In all reactions, the concentration of Al(OH)3 in the form of
a gel was observed
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Água produzida. Alumínio. Potencial de Pit (Ep). NR-13. Teste hidrostático. corrosão do alumínio;
Water produced aluminum Potential Pit (Ep). NR-13. Hydrostatic testing. Aluminum corrosion
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cunha, J. D. d. (2012). Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/13027
Chicago Manual of Style (16th Edition):
Cunha, Jardel Dantas da. “Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
.” 2012. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/13027.
MLA Handbook (7th Edition):
Cunha, Jardel Dantas da. “Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
.” 2012. Web. 07 Mar 2021.
Vancouver:
Cunha JDd. Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2012. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/13027.
Council of Science Editors:
Cunha JDd. Aplicação de técnicas eletroquímicas na determinação do potencial de corrosividade de ligas de alumínio em água produzida
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2012. Available from: http://repositorio.ufrn.br/handle/123456789/13027
Universidade do Rio Grande do Norte
14.
Silva, Allison Alexandre Ribeiro da.
Avaliação da corrosão em dutos por técnica gravimétrica e de resistência elétrica
.
Degree: 2011, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12951
► With the increasing of demand for natural gas and the consequent growth of the pipeline networks, besides the importance of transport and transfer of oil…
(more)
▼ With the increasing of demand for natural gas and the consequent growth of the
pipeline networks, besides the importance of transport and transfer of oil products by pipeline,
and when it comes to product quality and integrity of the pipeline there is an important role
regarding to the monitoring internal corrosion of the pipe. This study aims to assess corrosion
in three pipeline that operate with different products, using gravimetric techniques and
electrical resistance. Chemical analysis of residues originated in the pipeline helps to identify
the mechanism corrosive process. The internal monitoring of the corrosion in the pipelines
was carried out between 2009 and 2010 using coupon weight loss and electrical resistance
probe. Physico-chemical techniques of diffraction and fluorescence X-rays were used to
characterize the products of corrosion of the pipelines. The corrosion rate by weight loss was
analyzed for every pipeline, only those ones that has revealed corrosive attack were analyzed
located corrosion rate. The corrosion potential was classified as low to pipeline gas and
ranged from low to severe for oil pipelines and the pipeline derivatives. Corrosion products
were identified as iron carbonate, iron oxide and iron sulfide
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Corrosão;
Monitoramento;
Dutos;
Perda de massa;
Resistência elétrica;
Corrosion;
Monitoring;
Pipelines;
Metal loss;
Electrical resistence
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Silva, A. A. R. d. (2011). Avaliação da corrosão em dutos por técnica gravimétrica e de resistência elétrica
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12951
Chicago Manual of Style (16th Edition):
Silva, Allison Alexandre Ribeiro da. “Avaliação da corrosão em dutos por técnica gravimétrica e de resistência elétrica
.” 2011. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12951.
MLA Handbook (7th Edition):
Silva, Allison Alexandre Ribeiro da. “Avaliação da corrosão em dutos por técnica gravimétrica e de resistência elétrica
.” 2011. Web. 07 Mar 2021.
Vancouver:
Silva AARd. Avaliação da corrosão em dutos por técnica gravimétrica e de resistência elétrica
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2011. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12951.
Council of Science Editors:
Silva AARd. Avaliação da corrosão em dutos por técnica gravimétrica e de resistência elétrica
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2011. Available from: http://repositorio.ufrn.br/handle/123456789/12951
Universidade do Rio Grande do Norte
15.
Medeiros, Hena Lissa de Sousa.
Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
.
Degree: 2015, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/20491
► Produced water is a major waste generated during oil exploration and production. Due to its large volume and complex chemical composition an effort arises so…
(more)
▼ Produced water is a major waste generated during oil exploration and production. Due to its large volume and complex chemical composition an effort arises so that the contaminant concentrations meet the current legislation, in order to reduce harmful effects on the environment caused by its disposal without prior treatment. The objective of this paper is to characterize produced water from the Periquito field, RN, Brazil, and assess the adsorptive potential of babassu nut charcoal for removal of calcium and strontium from produced water, focusing on its suitability for disposal. Through the physicochemical characterization of the produced water, it was possible to observe that the concentrations of calcium and strontium were: 322 mg/L and 69 mg/L, respectively. The material to be used as an adsorbent was characterized through different physicochemical techniques, such as laser particle size, density, elemental analysis, thermal analysis, XRF, SEM, XRD and pHPZC. Provided the characterization analysis, adsorption experiments were carried out using the method of finite bath in synthetic solutions of both calcium and strontium. The results showed that babassu nut charcoal has maximum adsorption removal at low concentrations. In parallel with the study on adsorption in synthetic solutions, adsorption experiments were performed with produced water, whose results showed that babassu nut charcoal has good adsorption potential, removing over 50% of calcium and above 45% strontium, and having values of 17.31 mg/g for the adsorption capacity for calcium and 3.15 mg/g for strontium. In order to optimize the experiments, the full factorial design of two levels was applied in order to verify the influence of the concentration of calcium, strontium and the mass of the adsorbent in synthetic solution on the percentage of removal (%) and the adsorption capacity of adsorption of these metals. From the analysis results, it was possible to observe that the optimal regions for the removal of these metals was in the upper level of the metal concentration and in the upper level of the adsorbent mass (+1, +1) obtaining a maximum removal of 58 % for calcium and 63 % for strontium.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Água produzida;
Adsorção;
Carvão vegetal de coco babaçu;
Cálcio;
Estrôncio
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APA (6th Edition):
Medeiros, H. L. d. S. (2015). Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/20491
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Medeiros, Hena Lissa de Sousa. “Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
.” 2015. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/20491.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Medeiros, Hena Lissa de Sousa. “Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
.” 2015. Web. 07 Mar 2021.
Vancouver:
Medeiros HLdS. Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2015. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/20491.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Medeiros HLdS. Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
. [Thesis]. Universidade do Rio Grande do Norte; 2015. Available from: http://repositorio.ufrn.br/handle/123456789/20491
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
16.
Frota, Tarcila Maria Pinheiro.
Incrustação em poço produtor de petróleo e gás natural: um estudo de caso
.
Degree: 2009, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/19380
► Water and gas is a common by - product of the oil production process. Production may be compromised by the precipitation of inorganic salts in…
(more)
▼ Water and gas is a common
by
-
product
of the oil production process. Production may be
compromised by the precipitation of inorganic salts in both the reservoir and producing well,
through scale formation. This precipitation is likely the cause of the formation damage. High
temperatures and h
igh pressures (HTHP) may favor the precipitation of insoluble salts. The
most common types of scale in oil fields are calcium carbonate and calcium sulphate,
strontium and barium sulphate. New types of
scale formation
have attracted special attention
such
as zinc sulphide and lead. This precipitation may occur in the pores of reservoir rocks, in
the production string and in equipment, causing obstructions and consequent production
losses. In this study, the influence of well depth on incrustation compositio
n was investigated
to design removal treatments and assess the behavior of these deposits along the string,
through the analysis of pressure and temperature. Scale residues were recovered from the
inside of the production string of an oil and gas well duri
ng the string removal operation. A
total of 10 samples from different depths (15.4
m to 4061.5
m) were obtained.
Initially a
dissolution test was conducted in weak acid, similar to that used in removal operations with
this type of scale formation. Majority
composition was defined and confirmed by dissolution
tests using X
-
Ray Fluorescence Spectroscopy (XRF), X
-
Ray Diffraction (XRD) and Scanning
Electron Microscope (SEM) techniques. Residues with distinct characteristics were observed
in different proportion
s, showing a tendency toward increased and/or decreased mass with
depth. In the samples closest to the surface, typical sandstone residues were found, with
calcium (45% Ca) as the metal of highest concentration.
The obtained results indicate
correlations o
f the
scale
types studied with the
depth
and, consequently, with the
thermodynamic conditions of pressure and temperature.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Incrustação;
Coluna de produção;
Deposição inorgânica
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Frota, T. M. P. (2009). Incrustação em poço produtor de petróleo e gás natural: um estudo de caso
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/19380
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Frota, Tarcila Maria Pinheiro. “Incrustação em poço produtor de petróleo e gás natural: um estudo de caso
.” 2009. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/19380.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Frota, Tarcila Maria Pinheiro. “Incrustação em poço produtor de petróleo e gás natural: um estudo de caso
.” 2009. Web. 07 Mar 2021.
Vancouver:
Frota TMP. Incrustação em poço produtor de petróleo e gás natural: um estudo de caso
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2009. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/19380.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Frota TMP. Incrustação em poço produtor de petróleo e gás natural: um estudo de caso
. [Thesis]. Universidade do Rio Grande do Norte; 2009. Available from: http://repositorio.ufrn.br/handle/123456789/19380
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
17.
Leopoldino, Kleison José Medeiros.
Extração e caracterização de amido nativo e modificado da palma forrageira (Opuntia ficus indica)
.
Degree: 2017, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/23750
► Obtaining and chemical modification of starch from forage Palma (Opuntia ficus indica) is the object of study of this work. The starch was extracted from…
(more)
▼ Obtaining and chemical modification of starch from forage Palma (Opuntia ficus indica) is the object of study of this work. The starch was extracted from cactus pear presented purity 99.30% and modified routes this starch were oxidation and phosphorylation with the assessment of the effects of this change. The starch was modified by sodium periodate to the oxidation process, while for the phosphorylation process was varied the concentration of sodium tripolyphosphate compared to reaction times in order to establish phosphorus limits suitable for use in foods based on Codex Alimentarius . The results showed an increase in phosphorus content to give maximum accordance with the rules in time 40 minutes with 7% sodium tripolyphosphate. The results further indicated that both factors studied (time, concentration) influence the starch phosphate treatment due to the interaction of these independent variables. Of the properties evaluated the native and modified starch were determined chemical composition, phosphorus, starch, amylose and the shape and size of the starch granules. Chemical modification of starch caused higher phosphorus and ash and decreased levels of starch and amylose, achieving experimentally most phosphating according to the legislation in time from 40 minutes to 7% of sodium tripolyphosphate after going through a process dialysis. The functional properties of the samples were analyzed on native starch and modified and determined density, swelling power, solubility index characterizing the gel turbidity, syneresis, paste viscosity, calorimetric analysis. The native starch from cactus pear density showed 1.67 g.mL-1 and the modification decreased the density of native starch. The swelling power and solubility index of the native and modified starch showed significant differences. The modification also decreased the absorbance because it facilitates the passage of light, while syneresis was influenced by modifying, with an increase in the storage cycle number, and a decrease in chemical modification. The phosphate starch showed higher viscosity slurry than native starch because they possess greater power of swelling and solubility rate in water.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Amido modificado;
Palma forrageira;
Fosforilação;
Oxidação
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Leopoldino, K. J. M. (2017). Extração e caracterização de amido nativo e modificado da palma forrageira (Opuntia ficus indica)
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/23750
Chicago Manual of Style (16th Edition):
Leopoldino, Kleison José Medeiros. “Extração e caracterização de amido nativo e modificado da palma forrageira (Opuntia ficus indica)
.” 2017. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/23750.
MLA Handbook (7th Edition):
Leopoldino, Kleison José Medeiros. “Extração e caracterização de amido nativo e modificado da palma forrageira (Opuntia ficus indica)
.” 2017. Web. 07 Mar 2021.
Vancouver:
Leopoldino KJM. Extração e caracterização de amido nativo e modificado da palma forrageira (Opuntia ficus indica)
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2017. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/23750.
Council of Science Editors:
Leopoldino KJM. Extração e caracterização de amido nativo e modificado da palma forrageira (Opuntia ficus indica)
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/23750
Universidade do Rio Grande do Norte
18.
Medeiros, Hena Lissa de Sousa.
Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
.
Degree: 2015, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/20491
► Produced water is a major waste generated during oil exploration and production. Due to its large volume and complex chemical composition an effort arises so…
(more)
▼ Produced water is a major waste generated during oil exploration and production. Due to its large volume and complex chemical composition an effort arises so that the contaminant concentrations meet the current legislation, in order to reduce harmful effects on the environment caused by its disposal without prior treatment. The objective of this paper is to characterize produced water from the Periquito field, RN, Brazil, and assess the adsorptive potential of babassu nut charcoal for removal of calcium and strontium from produced water, focusing on its suitability for disposal. Through the physicochemical characterization of the produced water, it was possible to observe that the concentrations of calcium and strontium were: 322 mg/L and 69 mg/L, respectively. The material to be used as an adsorbent was characterized through different physicochemical techniques, such as laser particle size, density, elemental analysis, thermal analysis, XRF, SEM, XRD and pHPZC. Provided the characterization analysis, adsorption experiments were carried out using the method of finite bath in synthetic solutions of both calcium and strontium. The results showed that babassu nut charcoal has maximum adsorption removal at low concentrations. In parallel with the study on adsorption in synthetic solutions, adsorption experiments were performed with produced water, whose results showed that babassu nut charcoal has good adsorption potential, removing over 50% of calcium and above 45% strontium, and having values of 17.31 mg/g for the adsorption capacity for calcium and 3.15 mg/g for strontium. In order to optimize the experiments, the full factorial design of two levels was applied in order to verify the influence of the concentration of calcium, strontium and the mass of the adsorbent in synthetic solution on the percentage of removal (%) and the adsorption capacity of adsorption of these metals. From the analysis results, it was possible to observe that the optimal regions for the removal of these metals was in the upper level of the metal concentration and in the upper level of the adsorbent mass (+1, +1) obtaining a maximum removal of 58 % for calcium and 63 % for strontium.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Água produzida;
Adsorção;
Carvão vegetal de coco babaçu;
Cálcio;
Estrôncio
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Medeiros, H. L. d. S. (2015). Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/20491
Chicago Manual of Style (16th Edition):
Medeiros, Hena Lissa de Sousa. “Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
.” 2015. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/20491.
MLA Handbook (7th Edition):
Medeiros, Hena Lissa de Sousa. “Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
.” 2015. Web. 07 Mar 2021.
Vancouver:
Medeiros HLdS. Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2015. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/20491.
Council of Science Editors:
Medeiros HLdS. Estudo da adsorção do cálcio e estrôncio da água produzida utilizando carvão babaçu
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2015. Available from: http://repositorio.ufrn.br/handle/123456789/20491
Universidade do Rio Grande do Norte
19.
Araújo, Nayonara Karolynne Costa de.
Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
.
Degree: 2016, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/21100
► Contamination of groundwater by BTX has been featured in recent decades. This type of contamination is due to small and continuous leaks at gas stations,…
(more)
▼ Contamination of groundwater by BTX has been featured in recent decades. This type of contamination is due to small and continuous leaks at gas stations, causing serious problems to public health and the environment. Based on these antecedents, the search for new alternatives for treating contaminated water is shown to be essential. Therefore, this study aimed to evaluate the efficiency of removal of BTX by adsorption processes employing commercial alumina (Al2O3) and alumina supported with iron (Fe/Al2O3) as adsorbents. It was prepared by a in a synthetic gasoline solution and distilled water to simulate an actual sample. Initially, the adsorbents were characterized by techniques XRD, TG / DTG, XRF, FTIR and SEM/EDS, several trials, where he was placed synthetic solution to react in the presence of Al2O3 and Fe/Al2O3 in a closed, mechanical stirring system were performed varying the catalyst concentration 2, 4 and 6 g.L-1 every 0, 10, 30 60, 90 and 120 min, aliquots were taken and brought to analysis by gas chromatography flame ionization with headspace extraction. The results indicated that the absorbent which has higher BTX removal capacity was the Fe/Al2O3 at a concentration of 6 g.L-1, pH = 4 and time of 90 minutes reaction, resulting in an efficiency, resulting in a 86,5% efficiency for benzene removal, for the 95,4% toluene, 90,8% for ɱ,ρ- xylene and 93.7% for the θ-xylenes. Subsequently, we performed a kinetic study of the reactions, the values of experimental adsorption capacity (qe) showed agreement with the values of the theoretical adsorption capacity (qc) to the pseudo-second-order model in the adsorption tests using 2 and 6 gL-1 of Al2O3 and assays using 2, 4 and 6 g.L-1 of Fe/Al2O3. A fact corroborated by the R2 values, thus indicating that the chemical interactions are present in the adsorption mechanisms of BTX.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Adsorção;
Alumina;
BTX;
Tratamento de água
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Araújo, N. K. C. d. (2016). Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/21100
Chicago Manual of Style (16th Edition):
Araújo, Nayonara Karolynne Costa de. “Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
.” 2016. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/21100.
MLA Handbook (7th Edition):
Araújo, Nayonara Karolynne Costa de. “Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
.” 2016. Web. 07 Mar 2021.
Vancouver:
Araújo NKCd. Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2016. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/21100.
Council of Science Editors:
Araújo NKCd. Estudo da eficiência dos adsorventes de Al2O3 e Fe/Al2O3 para remoção de BTX presente em água contaminada com gasolina
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2016. Available from: http://repositorio.ufrn.br/handle/123456789/21100
Universidade do Rio Grande do Norte
20.
Galvão, Álvaro Gustavo Paulo.
Otimização de metodologia para determinação de enxofre na forma de sulfato em petróleo pesado por cromatografia de íons
.
Degree: 2017, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/23875
► Sulfur is the third most abundant element in petroleum and is considered one of the main contaminants present in this matrix, and may occur in…
(more)
▼ Sulfur is the third most abundant element in petroleum and is considered one of the main
contaminants present in this matrix, and may occur in the forms of sulfides, thiophenes,
polycyclic molecules containing oxygen and nitrogen etc. They can cause corrosion, poisoning
of catalysts used in refining and in automobiles. In fuel combustion, when present, they give
rise to SOX oxides, which contribute to the formation of acid rain, soil acidity and respiratory
problems in the population. Therefore, the determination of sulfur is of primary interest for the
petrochemical industry as well as for analytical chemistry. Considering this situation, it is
proposed the development of a procedure for the preparation of petroleum samples for the
determination of the sulfur content of sulfur (SO4
2-) by Ion Chromatography (IC). For this, the
wet decomposition assisted by microwave radiation, assisted by the oxidative action of H2O2,
was the adopted procedure, where the maximum temperature and power of 230 °C and 1000
W, respectively, were used in the program of heating. Six petroleum samples (°API between
18.75-5.17) were analyzed, with the mean concentrations of sulfur being between 377.50 and
3321.74 mg Kg-1, with a standard deviation between ± 1.02 and ± 9.56. For the purposes of the
evaluation of the obtained results, the sulfur content in the samples under study was evaluated
using the UVF technique, based on the official standard ASTM D 5453-12, where correlations
between 85.43 and 106.43% were reached, evidencing the efficiency of the method proposed
in the conversion of the sulfur species contained in the samples to sulfate and its determination
by IC. The efficiency of the adopted decomposition procedure was tested using RCC% and
EDMO%, with levels between 6.72 and 15.73% and 85.85 and 94.14% being respectively
achieved, demonstrating the efficiency of the decomposition procedure used.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Petróleo;
Enxofre;
Cromatografia de íons
Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Galvão, . G. P. (2017). Otimização de metodologia para determinação de enxofre na forma de sulfato em petróleo pesado por cromatografia de íons
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/23875
Chicago Manual of Style (16th Edition):
Galvão, Álvaro Gustavo Paulo. “Otimização de metodologia para determinação de enxofre na forma de sulfato em petróleo pesado por cromatografia de íons
.” 2017. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/23875.
MLA Handbook (7th Edition):
Galvão, Álvaro Gustavo Paulo. “Otimização de metodologia para determinação de enxofre na forma de sulfato em petróleo pesado por cromatografia de íons
.” 2017. Web. 07 Mar 2021.
Vancouver:
Galvão GP. Otimização de metodologia para determinação de enxofre na forma de sulfato em petróleo pesado por cromatografia de íons
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2017. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/23875.
Council of Science Editors:
Galvão GP. Otimização de metodologia para determinação de enxofre na forma de sulfato em petróleo pesado por cromatografia de íons
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/23875
Universidade do Rio Grande do Norte
21.
Lima, Maria Santana Bezerra de.
Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
.
Degree: 2010, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/17630
► The problems of water supply in Northeast Brazil are severe and require more focused studies. This work was intended to assess water quality in the…
(more)
▼ The problems of water supply in Northeast Brazil are severe and require more
focused studies. This work was intended to assess water quality in the watershed
Pirangi, located in the Northeastern state of the newborn using the Water Quality Index,
AQI associated with the Index of Toxicity-IT. The data presented in this study were
collected in November 2008, June 2009 and March 2010 at eight sampling stations
distributed throughout the basin. The study covered nine parameters, based on
guidelines established by CETESB, and seven members of Metal Toxicity index-IT.
These waters are framed in the classification between GOOD and BAD showing AQI
41.34 minimum and a maximum of 76.23. Virtually all seven metals analyzed were
below the detection limits of ICP-OES giving IT a water equal to one when they are
absent and 0 when there are levels of trace metals
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Bacia hidrográfica pirangi;
Água;
Índice de qualidade da água-IQA;
Índice de toxidez-IT;
Watershed pirangi;
Water;
Quality water-IQA;
Index of toxicity-IT
Record Details
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Cite
Share »
Record Details
Similar Records
Cite
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lima, M. S. B. d. (2010). Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/17630
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lima, Maria Santana Bezerra de. “Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
.” 2010. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/17630.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lima, Maria Santana Bezerra de. “Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
.” 2010. Web. 07 Mar 2021.
Vancouver:
Lima MSBd. Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2010. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/17630.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lima MSBd. Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
. [Thesis]. Universidade do Rio Grande do Norte; 2010. Available from: http://repositorio.ufrn.br/handle/123456789/17630
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
22.
Chiquetti, Samanta Cristina.
Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
.
Degree: 2013, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/17777
► Soil contamination by pesticides is an environmental problem that needs to be monitored and avoided. However, the lack of fast, accurate and low cost analytical…
(more)
▼ Soil contamination by pesticides is an environmental problem that needs to be
monitored and avoided. However, the lack of fast, accurate and low cost analytical
methods for discovering residual pesticide in complex matrices, such as soil, is a
problem still unresolved. This problem needs to be solved before we are able to assess
the quality of environmental samples.
The intensive use of pesticides has increased since the 60s, because the
dependence of their use, causing biological imbalances and promoting resistance and
recurrence of high populations of pests and pathogens (upwelling). This has contributed
to the appearance of new pests that were previously under natural control.
To develop analytical methods that are able to quantify residues pesticide in
complex environment. It is still a challenge for many laboratories. The integration of
two analytical methods one ecotoxicological and another chemical demonstrates the
potential for environmental analysis of methamidophos.
The aim of this study was to evaluate an ecotoxicological method as "screening"
analytical methamidophos in the soil and perform analytical confirmation in the samples
of the concentration of the analyte by chemical method LC-MS/MS
In this work we tested two soils: a clayey and sandy, both in contact with the
kinetic methamidophos model followed pseudo-second order. The clay soil showed
higher absorption of methamidophos and followed the Freundlich model, while the
sandy, the Langmuir model.
The chemical method was validated LC-MS/MS satisfactory, showing all
parameters of linearity, range, precision, accuracy, and sensitivity adequate. In chronic
ecotoxicological tests with C. dubia, the NOEC was 4.93 and 3.24 for ng L-1 of
methamidophos to elutriate assays of sandy and clay soils, respectively. The method for ecotoxicological levels was more sensitive than LC-MS/MS
detection of methamidophos, loamy and sandy soils. However, decreasing the
concentration of the standard for analytical methamidophos and adjusting for the
validation conditions chemical acquires a limit of quantification (LOQ) in ng L-1,
consistent with the provisions of ecotoxicological test.
The methods described should be used as an analytical tool for methamidophos
in soil, and the ecotoxicological analysis can be used as a "screening" and LC-MS/MS
as confirmatory analysis of the analyte molecule, confirming the objectives of this
work
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Metamidofós. Adsorção. Solo. Ceriodaphnia dubia. LC-MS/MS;
Methamidophos. Adsorption. Soil. Ceriodaphnia dubia. LC-MS/MS
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chiquetti, S. C. (2013). Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/17777
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chiquetti, Samanta Cristina. “Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
.” 2013. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/17777.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chiquetti, Samanta Cristina. “Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
.” 2013. Web. 07 Mar 2021.
Vancouver:
Chiquetti SC. Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2013. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/17777.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chiquetti SC. Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
. [Thesis]. Universidade do Rio Grande do Norte; 2013. Available from: http://repositorio.ufrn.br/handle/123456789/17777
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
23.
Lima, Maria Santana Bezerra de.
Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
.
Degree: 2010, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/17630
► The problems of water supply in Northeast Brazil are severe and require more focused studies. This work was intended to assess water quality in the…
(more)
▼ The problems of water supply in Northeast Brazil are severe and require more
focused studies. This work was intended to assess water quality in the watershed
Pirangi, located in the Northeastern state of the newborn using the Water Quality Index,
AQI associated with the Index of Toxicity-IT. The data presented in this study were
collected in November 2008, June 2009 and March 2010 at eight sampling stations
distributed throughout the basin. The study covered nine parameters, based on
guidelines established by CETESB, and seven members of Metal Toxicity index-IT.
These waters are framed in the classification between GOOD and BAD showing AQI
41.34 minimum and a maximum of 76.23. Virtually all seven metals analyzed were
below the detection limits of ICP-OES giving IT a water equal to one when they are
absent and 0 when there are levels of trace metals
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Bacia hidrográfica pirangi;
Água;
Índice de qualidade da água-IQA;
Índice de toxidez-IT;
Watershed pirangi;
Water;
Quality water-IQA;
Index of toxicity-IT
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lima, M. S. B. d. (2010). Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/17630
Chicago Manual of Style (16th Edition):
Lima, Maria Santana Bezerra de. “Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
.” 2010. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/17630.
MLA Handbook (7th Edition):
Lima, Maria Santana Bezerra de. “Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
.” 2010. Web. 07 Mar 2021.
Vancouver:
Lima MSBd. Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2010. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/17630.
Council of Science Editors:
Lima MSBd. Monitoramento das águas da bacia hidrográfica pirangi
pela determinação dos índices de qualidade da água-iqa e
índice de toxidez-it
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2010. Available from: http://repositorio.ufrn.br/handle/123456789/17630
Universidade do Rio Grande do Norte
24.
Lima, Gilberto de.
Estudo de um novo eletrólito polimérico sólido em forma de filme autossustentável: Poli(óxido de etileno)-tungstato de sódio
.
Degree: 2016, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/21476
► Self-sustainable polymeric films based on new solid polymer electrolyte, having the poly(ethylene oxide) (PEO) as host matrix and sodium tungstate as doping agent (Na2WO4), were…
(more)
▼ Self-sustainable polymeric films based on new solid polymer electrolyte, having the
poly(ethylene oxide) (PEO) as host matrix and sodium tungstate as doping agent (Na2WO4),
were obtained from different salt compositions (m = 0.20; 0.26; 0.30; 0.40; 0.50 and 1.31
mg). The films were characterized through XRD, FTIR, SEM/EDS, TG/DTG, DSC and IS.
X-ray diffraction showed the semi crystalline nature of the polymer and confirmed that the
addition of salt induces reduction in the crystalinity of the films. FTIR data allowed the
identification of the interaction between salt ions and polymer chains and confirmed that these
interactions are of a physical nature. The micrographs obtained through SEM showed
spherulitic morphology interleaved by interlayered bonds for all of the compositions studied.
The TG/DTG study revealed that the thermal decomposition of the electrolyte almost happens
at a single stage with the addition of salt, increasing the thermal stability of the films.
TG/DTG data also allowed the kinetic study of the thermal decomposition of the electrolyte
through Broido (BR), Coats-Redfern (CR) and Horowitz-Metzger (HM) methods, suggesting
a first-order kinetic for the reaction of the thermal decomposition of the films, as well as the
setting of pre-exponential factor, A, and the thermodynamic activation parameters: E*, ΔH*,
ΔS* and ΔG*. The crystallinity degree was determined through DSC data and showed a
reduction after the addition of salt to the polymer. The polymer has its conductivity increased
after addition of the salt with the PEO-Na2WO4 electrolyte exhibiting maximum of ionic
conductivity of 3.24x10-4 S cm-1, to room temperature, for the film with 1.31 mg of salt (F6
film). The impedance data allowed the study on relaxation on PEO chains, even as the
diffusion of salt between these chains. The impedance diagrams, on Bode and Nyquist
formats, enabled the adjustment of the experimental data to equivalent electric circuits, which
facilitated the association of the circuit components to the physical and chemical phenomena
observed for the films and revealed that, after the addition of salt to the polymer, the films
have their electrical properties enhanced.
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), 13893734449 (advisor), Cavalcante, Maria Gorette (advisor), 10843329491 (advisor).
Subjects/Keywords: Poli(óxido de etileno) (POE);
Tungstato de Sódio (Na2WO4);
Eletrólito Polimérico Sólido (EPS);
Estudo termocinético;
Condutividade iônica
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lima, G. d. (2016). Estudo de um novo eletrólito polimérico sólido em forma de filme autossustentável: Poli(óxido de etileno)-tungstato de sódio
. (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/21476
Chicago Manual of Style (16th Edition):
Lima, Gilberto de. “Estudo de um novo eletrólito polimérico sólido em forma de filme autossustentável: Poli(óxido de etileno)-tungstato de sódio
.” 2016. Masters Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/21476.
MLA Handbook (7th Edition):
Lima, Gilberto de. “Estudo de um novo eletrólito polimérico sólido em forma de filme autossustentável: Poli(óxido de etileno)-tungstato de sódio
.” 2016. Web. 07 Mar 2021.
Vancouver:
Lima Gd. Estudo de um novo eletrólito polimérico sólido em forma de filme autossustentável: Poli(óxido de etileno)-tungstato de sódio
. [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2016. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/21476.
Council of Science Editors:
Lima Gd. Estudo de um novo eletrólito polimérico sólido em forma de filme autossustentável: Poli(óxido de etileno)-tungstato de sódio
. [Masters Thesis]. Universidade do Rio Grande do Norte; 2016. Available from: http://repositorio.ufrn.br/handle/123456789/21476
Universidade do Rio Grande do Norte
25.
Chiquetti, Samanta Cristina.
Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
.
Degree: 2013, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/17777
► Soil contamination by pesticides is an environmental problem that needs to be monitored and avoided. However, the lack of fast, accurate and low cost analytical…
(more)
▼ Soil contamination by pesticides is an environmental problem that needs to be
monitored and avoided. However, the lack of fast, accurate and low cost analytical
methods for discovering residual pesticide in complex matrices, such as soil, is a
problem still unresolved. This problem needs to be solved before we are able to assess
the quality of environmental samples.
The intensive use of pesticides has increased since the 60s, because the
dependence of their use, causing biological imbalances and promoting resistance and
recurrence of high populations of pests and pathogens (upwelling). This has contributed
to the appearance of new pests that were previously under natural control.
To develop analytical methods that are able to quantify residues pesticide in
complex environment. It is still a challenge for many laboratories. The integration of
two analytical methods one ecotoxicological and another chemical demonstrates the
potential for environmental analysis of methamidophos.
The aim of this study was to evaluate an ecotoxicological method as "screening"
analytical methamidophos in the soil and perform analytical confirmation in the samples
of the concentration of the analyte by chemical method LC-MS/MS
In this work we tested two soils: a clayey and sandy, both in contact with the
kinetic methamidophos model followed pseudo-second order. The clay soil showed
higher absorption of methamidophos and followed the Freundlich model, while the
sandy, the Langmuir model.
The chemical method was validated LC-MS/MS satisfactory, showing all
parameters of linearity, range, precision, accuracy, and sensitivity adequate. In chronic
ecotoxicological tests with C. dubia, the NOEC was 4.93 and 3.24 for ng L-1 of
methamidophos to elutriate assays of sandy and clay soils, respectively. The method for ecotoxicological levels was more sensitive than LC-MS/MS
detection of methamidophos, loamy and sandy soils. However, decreasing the
concentration of the standard for analytical methamidophos and adjusting for the
validation conditions chemical acquires a limit of quantification (LOQ) in ng L-1,
consistent with the provisions of ecotoxicological test.
The methods described should be used as an analytical tool for methamidophos
in soil, and the ecotoxicological analysis can be used as a "screening" and LC-MS/MS
as confirmatory analysis of the analyte molecule, confirming the objectives of this
work
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Metamidofós. Adsorção. Solo. Ceriodaphnia dubia. LC-MS/MS;
Methamidophos. Adsorption. Soil. Ceriodaphnia dubia. LC-MS/MS
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chiquetti, S. C. (2013). Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
. (Doctoral Dissertation). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/17777
Chicago Manual of Style (16th Edition):
Chiquetti, Samanta Cristina. “Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
.” 2013. Doctoral Dissertation, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/17777.
MLA Handbook (7th Edition):
Chiquetti, Samanta Cristina. “Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
.” 2013. Web. 07 Mar 2021.
Vancouver:
Chiquetti SC. Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
. [Internet] [Doctoral dissertation]. Universidade do Rio Grande do Norte; 2013. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/17777.
Council of Science Editors:
Chiquetti SC. Detecção de metamidofós em solos por
métodos ecotoxicológico e cromatografia
líquida acoplada à espectrometria de massas
sequencial (LC-MS/MS)
. [Doctoral Dissertation]. Universidade do Rio Grande do Norte; 2013. Available from: http://repositorio.ufrn.br/handle/123456789/17777
Universidade do Rio Grande do Norte
26.
Nascimento, Luciana Araújo.
Diagnóstico da possível influência da atividade petrolífera em sedimentos de fundo da Bacia Piranhas-Açu, região Baixo Açu/RN
.
Degree: 2008, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12885
► It is located in an area of increasing oil exploration, the region of the Lower Açu is at the mercy of a possible pollution generated…
(more)
▼ It is located in an area of increasing oil exploration, the region of the Lower Açu is at the mercy of a possible pollution generated by this economic activity, which includes various chemical substances harmful to health, such as metals. This thesis aims to, diagnose
the areas of River Piranhas-Açu, a region of the Lower Açu, which are polluted by traces factors and more. In this study, it was determined the concentration of the chemica elements Al, CD, Cr, Cu, Fe, Mn, Ni, P, Pb, V and Zn, through the technique of ICP-OES analysis and the size of sediments and their contents organic matter. Were mapped by GPS, 12 points from collections. The interpretations of the results, together associating
that allowed pollution to a possible contamination by oil activity. The results showed tha some regions have low concentrations of cadmium, lead, copper, manganese and zinc unable to promote damage to human health. However, there are places where the concentrations of certain metals chromium, iron and zinc are moderately polluted compared to the results with the reference values of literature and others that are highly
polluted by iron. However, due to a greater number of wells in production in those locations, those higher concentrations, it can be suggested a possible influence of oi production in some areas with concentrations of chromium and lead are higher than the
rest of the points of monitoring. Moreover, it is observed that the highest levels of metals found in sediment of finer texture and more organic matter content
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Metais-traço;
Sedimento;
Rio Piranhas-Açu;
Contaminação;
Atividade petrolífera;
Trace metals;
Sediment;
River Piranhas-Açu;
Contamination;
Oil activity
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nascimento, L. A. (2008). Diagnóstico da possível influência da atividade petrolífera em sedimentos de fundo da Bacia Piranhas-Açu, região Baixo Açu/RN
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12885
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nascimento, Luciana Araújo. “Diagnóstico da possível influência da atividade petrolífera em sedimentos de fundo da Bacia Piranhas-Açu, região Baixo Açu/RN
.” 2008. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12885.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nascimento, Luciana Araújo. “Diagnóstico da possível influência da atividade petrolífera em sedimentos de fundo da Bacia Piranhas-Açu, região Baixo Açu/RN
.” 2008. Web. 07 Mar 2021.
Vancouver:
Nascimento LA. Diagnóstico da possível influência da atividade petrolífera em sedimentos de fundo da Bacia Piranhas-Açu, região Baixo Açu/RN
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2008. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12885.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nascimento LA. Diagnóstico da possível influência da atividade petrolífera em sedimentos de fundo da Bacia Piranhas-Açu, região Baixo Açu/RN
. [Thesis]. Universidade do Rio Grande do Norte; 2008. Available from: http://repositorio.ufrn.br/handle/123456789/12885
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
27.
Ramalho, Adriana Margarida Zanbotto.
Estudo de reatores eletroquímicos para remoção de Cu2+
, Zn2+, Fenol e BTEX em água produzida
.
Degree: 2008, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12886
► The production of water has become one of the most important wastes in the petroleum industry, specifically in the up stream segment. The treatment of…
(more)
▼ The production of water has become one of the most important wastes in the petroleum industry, specifically in the up stream segment. The treatment of this kind of effluents is complex and normally requires high costs. In this context, the electrochemical treatment emerges as an alternative methodology for treating the wastewaters. It employs electrochemical reactions to increase the capability and efficiency of the traditional chemical treatments for associated produced water. The use of electrochemical reactors can be effective with small changes in traditional treatments, generally not representing a significant additional surface area for new equipments (due to the high cost of square meter
on offshore platforms) and also it can use almost the same equipments, in continuous or batch flow, without others high costs investments. Electrochemical treatment causes low environmental impact, because the process uses electrons as reagent and generates small amount of wastes. In this work, it was studied two types of electrochemical reactors: eletroflocculation and eletroflotation, with the aim of removing of Cu2+, Zn2+, phenol and BTEX mixture of produced water. In eletroflocculation, an electrical potential was applied
to an aqueous solution containing NaCl. For this, it was used iron electrodes, which promote the dissolution of metal ions, generating Fe2+ and gases which, in appropriate pH, promote also clotting-flocculation reactions, removing Cu2+ and Zn2+. In eletroflotation, a
carbon steel cathode and a DSA type anode (Ti/TiO2-RuO2-SnO2) were used in a NaCl solution. It was applied an electrical current, producing strong oxidant agents as Cl2 and HOCl, increasing the degradation rate of BTEX and phenol. Under different flow rates, the
Zn2+ was removed by electrodeposition or by ZnOH formation, due the increasing of pH during the reaction. To better understand the electrochemical process, a statistical protocol factor (22) with central point was conducted to analyze the sensitivity of operating
parameters on removing Zn2+ by eletroflotation, confirming that the current density affected the process negatively and the flow rate positively. For economical viability of these two electrochemical treatments, the energy consumption was calculated, taking in account the kWh given by ANEEL. The treatment cost obtained were quite attractive in comparison with the current treatments used in
Rio Grande do Norte state. In addition, it could still be reduced for the case of using other alternative energy source such as solar, wind or gas generated directly from the Petrochemical Plant or offshore platforms
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Tratamento eletroquímico;
Água produzida;
BTEX;
Fenol;
Cu2+;
Zn2+;
Electrochemical treatment;
Produced water;
BTEX;
Phenol;
Cu2+;
Zn2+
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to Zotero / EndNote / Reference
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APA (6th Edition):
Ramalho, A. M. Z. (2008). Estudo de reatores eletroquímicos para remoção de Cu2+
, Zn2+, Fenol e BTEX em água produzida
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12886
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ramalho, Adriana Margarida Zanbotto. “Estudo de reatores eletroquímicos para remoção de Cu2+
, Zn2+, Fenol e BTEX em água produzida
.” 2008. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12886.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ramalho, Adriana Margarida Zanbotto. “Estudo de reatores eletroquímicos para remoção de Cu2+
, Zn2+, Fenol e BTEX em água produzida
.” 2008. Web. 07 Mar 2021.
Vancouver:
Ramalho AMZ. Estudo de reatores eletroquímicos para remoção de Cu2+
, Zn2+, Fenol e BTEX em água produzida
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2008. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12886.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ramalho AMZ. Estudo de reatores eletroquímicos para remoção de Cu2+
, Zn2+, Fenol e BTEX em água produzida
. [Thesis]. Universidade do Rio Grande do Norte; 2008. Available from: http://repositorio.ufrn.br/handle/123456789/12886
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
28.
Viana, Marcelino Gevilbergue.
Avaliação de produtos naturais no controle de biofilmes
formados em sistema dinâmico
.
Degree: 2009, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12903
► The biofilms microbial forms of association are responsible for generating, accelerating and / or induce the process of corrosion. The damage generated in the petroleum…
(more)
▼ The biofilms microbial forms of association are responsible for generating, accelerating and / or induce the process of corrosion. The damage generated in the petroleum industry for
this type of corrosion is significatives, representing major investment for your control. The aim of this study was to evaluate such tests antibiograms the effects of extracts of Jatropha curcas and essential oil of Lippia gracilis Schauer on microrganisms isolated from water samples and, thereafter, select the most effective natural product for further evaluation of biofilms formed in dynamic system. Extracts of J. curcas were not efficient on the complete inhibition of microbial growth in tests type antibiogram, and essential oil of L. gracilis Schauer most effective and determined for the other tests. A standard concentration of essential oil of 20 μL was chosen and established for the evaluation of the biofilms and the rate of corrosion. The biocide effect was determined by microbial counts of five types of microorganisms: aerobic bacteria, precipitating iron, total anaerobic, sulphate reducers (BRS) and fungi. The rate of corrosion was measured by loss of mass. Molecular identification and scanning electron microscopy (SEM) were performed. The data showed reduction to zero of the most probable number (MPN) of bacteria precipitating iron and BRS from 115 and 113
minutes of contact, respectively. There was also inhibited in fungi, reducing to zero the rate of colony-forming units (CFU) from 74 minutes of exposure. However, for aerobic and
anaerobic bacteria there was no significant difference in the time of exposure to the essential oil, remaining constant. The rate of corrosion was also influenced by the presence of oil. The essential oil of L. gracilis was shown to be potentially effective
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Biofilme;
Biocorrosão;
Lippia gracilis Schauer;
Biocida e corrosão;
Biofilm;
Biocorrosion;
Lippia gracilis Schauer;
Biocid and corrosion
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Viana, M. G. (2009). Avaliação de produtos naturais no controle de biofilmes
formados em sistema dinâmico
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12903
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Viana, Marcelino Gevilbergue. “Avaliação de produtos naturais no controle de biofilmes
formados em sistema dinâmico
.” 2009. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12903.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Viana, Marcelino Gevilbergue. “Avaliação de produtos naturais no controle de biofilmes
formados em sistema dinâmico
.” 2009. Web. 07 Mar 2021.
Vancouver:
Viana MG. Avaliação de produtos naturais no controle de biofilmes
formados em sistema dinâmico
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2009. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12903.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Viana MG. Avaliação de produtos naturais no controle de biofilmes
formados em sistema dinâmico
. [Thesis]. Universidade do Rio Grande do Norte; 2009. Available from: http://repositorio.ufrn.br/handle/123456789/12903
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
29.
Fontes, Vilsinéia dos Anjos.
Estudo de adsorvente obtido de terras diatomáceas para remoção de metais pesados em águas produzidas: processamento, caracterização e dinâmica em leito fixo
.
Degree: 2010, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12927
► The acceleration of industrial growth in recent decades on all continents aroused the interest of the companies to counter the impacts produced on the environment,…
(more)
▼ The acceleration of industrial growth in recent decades on all continents aroused the interest of the companies to counter the impacts produced on the environment, spurred primarily by major disasters in the petroleum industry. In this context, the water produced is responsible for the largest volume of effluent from the production and extraction of oil and natural gas. This effluent has in its composition some critical components such as inorganic salts, heavy metals (Fe, Cu, Zn, Pb, Cd, ), presence of oil and chemicals added in the various production processes. In response to impact, have been triggered by research alternative adsorbent materials for water treatment and water produced, in order to removing oils and acids and heavy metals. Many surveys of diatomaceous earth (diatomite) in Brazil involve studies on the physico-chemical, mineral deposits, extraction, processing and applications. The official estimated Jazi are around 2.5 million tonnes, the main located in the states of Bahia (44%) and
Rio Grande do Norte (37,4%). Moreover, these two states appear as large offshore producers, earning a prominent role in research of adsorbents such as diatomite for treatment of water produced. Its main applications are as an agent of filtration, adsorption of oils and greases, industrial load and thermal insulator. The objective of this work was the processing and characterization of diatomite diatomaceous earth obtained from the municipality of Macaíba-RN (known locally as tabatinga) as a low cost regenerative adsorbent for removal of heavy metals in the application of water produced treatment. In this work we adopted a methodology for batch processing, practiced by small businesses located in producing regions of Brazil. The characterization was made by X-ray diffraction (XRD), scanning electron microscopy (SEM) and specific surface area (BET). Research conducted showed that the improvement process used was effective for small volume production of diatomite concentrated. The diatomite obtained was treated by calcination at temperature of 900 °C for 2 hours, with and without fluxing Na2CO3 (4%), according to optimal results in the literature. Column adsorption experiments were conducted to percolation of the in nature, calcined and calcined fluxing diatomites. Effluent was used as a saline solution containing ions of Cu, Zn, Na, Ca and Mg simulating the composition of produced waters in the state of
Rio Grande do Norte, Brazil. The breakthrough curves for simultaneous removal of copper ions and zinc as a result, 84.3% for calcined diatomite and diatomite with 97.3 % for fluxing. The calcined fluxing diatomite was more efficient permeability through the bed and removal of copper and zinc ions. The fresh diatomite had trouble with the permeability through the bed under the conditions tested, compared with the other obtained diatomite. The results are presented as promising for application in the petroleum industry
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Diatomita;
Água produzida;
Metais pesados;
Adsorção;
Poluentes industriais;
Diatomite;
Produced water;
Havy metals;
Adsorption;
Industrial pollutants
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fontes, V. d. A. (2010). Estudo de adsorvente obtido de terras diatomáceas para remoção de metais pesados em águas produzidas: processamento, caracterização e dinâmica em leito fixo
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12927
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fontes, Vilsinéia dos Anjos. “Estudo de adsorvente obtido de terras diatomáceas para remoção de metais pesados em águas produzidas: processamento, caracterização e dinâmica em leito fixo
.” 2010. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12927.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fontes, Vilsinéia dos Anjos. “Estudo de adsorvente obtido de terras diatomáceas para remoção de metais pesados em águas produzidas: processamento, caracterização e dinâmica em leito fixo
.” 2010. Web. 07 Mar 2021.
Vancouver:
Fontes VdA. Estudo de adsorvente obtido de terras diatomáceas para remoção de metais pesados em águas produzidas: processamento, caracterização e dinâmica em leito fixo
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2010. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12927.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fontes VdA. Estudo de adsorvente obtido de terras diatomáceas para remoção de metais pesados em águas produzidas: processamento, caracterização e dinâmica em leito fixo
. [Thesis]. Universidade do Rio Grande do Norte; 2010. Available from: http://repositorio.ufrn.br/handle/123456789/12927
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade do Rio Grande do Norte
30.
Lima, Daniel de Andrade.
Quantificação de Fases Cristalinas de Incrustações em Colunas
de Produção de Petróleo pelo Método Rietveld
.
Degree: 2009, Universidade do Rio Grande do Norte
URL: http://repositorio.ufrn.br/handle/123456789/12931
► The scale is defined as chemical compounds from inorganic nature, initially soluble in salt solutions, which may precipitate accumulate in columns of production and surface…
(more)
▼ The scale is defined as chemical compounds from inorganic nature, initially soluble in salt
solutions, which may precipitate accumulate in columns of production and surface equipment. This
work aimd to quantify the crystalline phases of scale through the Rietveld method. The study was
conducted in scale derived from columns production wells in development and recipients of pigs. After
collecting samples of scale were performed the procedure for separations of inorganic and organic
phase and preparation to be analyzed at the X-ray Laboratory. The XRD and XRF techniques were
used to monitor whether identifying and quantifying crystalline phases present in the deposits. The
SEM technique was used to visualize the morphology of the scales and assess their homogeneity after
the milling process. XRD measurements were performed with and without milling and with or without
the accessory spinner. For quantify crystalline phases the program DBWStools was used. The
procedure for conducting the first refinement was instrumental in setting parameters, then the
structural parameters of the phases in the sample and finally the parameters of the function profile
used. In the diffraction patterns of samples of scale observed that the best measures were those that
passed through the mill and used the accessory spinner. Through the results, it was noted that the
quantitative analysis for samples of scale is feasible when need to monitor a particular crystalline
phase in a well, pipeline or oil field. Routinely, the quantification of phases by the Rietveld method is
hardwork because in many scale was very difficult to identify the crystalline phases present
Advisors/Committee Members: Silva, Djalma Ribeiro da (advisor), CPF:13893734449 (advisor), http://lattes.cnpq.br/2791074318745945 (advisor).
Subjects/Keywords: Incrustação;
Difração de raios X;
Método Rietveld;
Scale;
X-ray diffraction;
Rietveld Method
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lima, D. d. A. (2009). Quantificação de Fases Cristalinas de Incrustações em Colunas
de Produção de Petróleo pelo Método Rietveld
. (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12931
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lima, Daniel de Andrade. “Quantificação de Fases Cristalinas de Incrustações em Colunas
de Produção de Petróleo pelo Método Rietveld
.” 2009. Thesis, Universidade do Rio Grande do Norte. Accessed March 07, 2021.
http://repositorio.ufrn.br/handle/123456789/12931.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lima, Daniel de Andrade. “Quantificação de Fases Cristalinas de Incrustações em Colunas
de Produção de Petróleo pelo Método Rietveld
.” 2009. Web. 07 Mar 2021.
Vancouver:
Lima DdA. Quantificação de Fases Cristalinas de Incrustações em Colunas
de Produção de Petróleo pelo Método Rietveld
. [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2009. [cited 2021 Mar 07].
Available from: http://repositorio.ufrn.br/handle/123456789/12931.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lima DdA. Quantificação de Fases Cristalinas de Incrustações em Colunas
de Produção de Petróleo pelo Método Rietveld
. [Thesis]. Universidade do Rio Grande do Norte; 2009. Available from: http://repositorio.ufrn.br/handle/123456789/12931
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] [3] [4] [5] ▶
. 
Open Access Theses and Dissertations