subject:(calcium carbonate precipitation)

Delft University of Technology

1. Ubbink, B.J. (author). Controlled Precipitation of Calcium Carbonate in Spatial Dimension with Multiple Calcium Chloride and Sodium Carbonate Pulses.

Degree: 2013, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:ab589a5b-a116-4da0-9bc1-ae43fdca192d

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Controlled calcium carbonate precipitation can be used for various applications. Calcium carbonate precipitation occurs when dissolved calcium and carbonate are mixed at concentrations which exceed… (more)

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Controlled calcium carbonate precipitation can be used for various applications. Calcium carbonate precipitation occurs when dissolved calcium and carbonate are mixed at concentrations which exceed the solubility of calcium carbonate. With alternate injection of pulses of calcium chloride and sodium carbonate solutions in time through a porous medium, dispersion will create a partial mixing zone in space, which moves through the whole system by advective flow. By means of dispersion and advection this should then create a homogeneous calcium carbonate deposit. By varying the concentration of the pulses, the size of the pulses, the distance between the pulses and the flow velocity it should be possible to control the location and distribution of the precipitated calcium carbonate to a certain extent. To investigate this principle a numerical model is developed, which is based on advective-dispersive-reactive transport equations for multiple dissolved and solid components using Matlab and Orchestra. Different ways of implementation have been tested and the performance of the model has been evaluated. With the final model seven different simulations were performed in which the system variables: concentration, flow rate, pulse duration and pulse distance were varied. These simulations showed that controlled precipitation of calcium carbonate using alternating pulse injections is possible. Increasing the distance between the pulses increases the distance over which the calcium carbonate is distributed, while the amount stays the same. Doubling the solute concentration in the pulse leads to a proportional increase of the amount of calcium carbonate. Doubling the flow velocity or the pulse duration lowers the peak quantity of calcium carbonate but improves the distribution. However, the quantity of precipitated calcium carbonate in all simulations was only 30% of the expected quantity of calcium carbonate. Further investigations showed a saw tooth pattern near the injection point which indicate that calcium carbonate is dissolving again at a higher rate than anticipated. To prevent this loss of calcium carbonate the model needs to be adjusted by implementing the dissolution kinetics. Secondly the model needs to be validated by experiments.

Petroleum Engineering

Geoscience & Engineering

Civil Engineering and Geosciences

Advisors/Committee Members: Van Paassen, L.A. (mentor), Rossen, W.R. (mentor).

Subjects/Keywords: Calcium Carbonate; Controlled Precipitation; Multiple Pulses

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ubbink, B. J. (. (2013). Controlled Precipitation of Calcium Carbonate in Spatial Dimension with Multiple Calcium Chloride and Sodium Carbonate Pulses. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ab589a5b-a116-4da0-9bc1-ae43fdca192d

Chicago Manual of Style (16^th Edition):

Ubbink, B J (author). “Controlled Precipitation of Calcium Carbonate in Spatial Dimension with Multiple Calcium Chloride and Sodium Carbonate Pulses.” 2013. Masters Thesis, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:ab589a5b-a116-4da0-9bc1-ae43fdca192d.

MLA Handbook (7^th Edition):

Ubbink, B J (author). “Controlled Precipitation of Calcium Carbonate in Spatial Dimension with Multiple Calcium Chloride and Sodium Carbonate Pulses.” 2013. Web. 12 Apr 2021.

Vancouver:

Ubbink BJ(. Controlled Precipitation of Calcium Carbonate in Spatial Dimension with Multiple Calcium Chloride and Sodium Carbonate Pulses. [Internet] [Masters thesis]. Delft University of Technology; 2013. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:ab589a5b-a116-4da0-9bc1-ae43fdca192d.

Council of Science Editors:

Ubbink BJ(. Controlled Precipitation of Calcium Carbonate in Spatial Dimension with Multiple Calcium Chloride and Sodium Carbonate Pulses. [Masters Thesis]. Delft University of Technology; 2013. Available from: http://resolver.tudelft.nl/uuid:ab589a5b-a116-4da0-9bc1-ae43fdca192d

Université de Lorraine

2. Schnebelen, Mathilde. Étude de l'agglomération lors de la précipitation de carbonate de calcium par un procédé de carbonatation d'une suspension d'hydroxyde de calcium : Study of the agglomeration during the precipitation of calcium carbonate by a carbonation process of a calcium hydroxide suspension.

Degree: Docteur es, Génie des procédés et des produits, 2015, Université de Lorraine

URL: http://www.theses.fr/2015LORR0131

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Le carbonate de calcium précipité (CCP) est un additif multi-fonctionnel que l'on trouve dans de nombreuses applications telles que les peintures, la pharmacie, la cosmétique… (more)

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Le carbonate de calcium précipité (CCP) est un additif multi-fonctionnel que l'on trouve dans de nombreuses applications telles que les peintures, la pharmacie, la cosmétique etc. Il peut être synthétisé industriellement par différents procédés mais la voie la plus commune est la carbonatation. Ce procédé consiste à faire barboter du dioxyde de carbone dans une suspension d'hydroxyde de calcium afin de produire des particules de CCP. Toutefois, la problématique inhérente à la synthèse et à l'utilisation de ce précipité est la maîtrise de l'agglomération des monoparticules. En effet, ces dernières sont de taille nanométrique et s'agglomèrent en structures "ouvertes" de taille micrométrique. Cette agglomération a des conséquences directes sur la conduite du procédé ainsi que sur les propriétés d'usage du produit final. Ainsi, le but de ce travail est d'appréhender les mécanismes de ce phénomène, de déterminer sa cinétique et d'étudier l'impact de différents paramètres opératoires dans des conditions industrielles complexes. Sous réserve que les cinétiques de nucléation et croissance cristalline soient connues, le noyau d'agglomération peut être obtenu grâce à un traitement mathématique des distributions de tailles expérimentales. En faisant varier différents paramètres du procédé, il apparait que la constante d'agglomération augmente avec la température alors qu'il existe un optimum par rapport au taux de cisaillement. En se basant sur cette conclusion, une expression de la constante d'agglomération est proposée en fonction du taux de cisaillement, qui pourra être utilisée pour contrôler l'agglomération dans le réacteur industriel

Precipitated calcium carbonate (PCC) is a mineral additive of various applications in paints, pharmacy, cosmetics, etc. It can be industrially synthesized through several ways but the most common one is the carbonation route. It consists in bubbling carbon dioxide in a suspension of calcium hydroxide to get particles of PCC. However, the challenge related to the synthesis and the use of this precipitate is the control of the agglomeration of the monoparticles. Indeed, they are agglomerated in micrometric "loose" structures. This agglomeration has consequences on the run of the process and the end use properties of the final product. Thus, the aim of this work is to understand the mechanisms of this phenomenon, to determine its kinetics and to study the impact of different process parameters under complex industrial conditions. The method to determine the agglomeration kernel is based on the resolution of a population balance using the moment approach. Provided that the kinetic rates of nucleation and growth are known, the agglomeration kernel can be obtained from a mathematical treatment of the experimental particle size distributions. Thanks to an agglomeration kernel model including the crystal growth, it is possible to determine the value of the agglomeration constant. Finally, by varying different process parameters, it also appears that the agglomeration constant increases with…

Advisors/Committee Members: Muhr, Hervé (thesis director), Plasari, Edouard (thesis director).

Subjects/Keywords: Précipitation; Agglomération; Carbonate de calcium; Precipitation; Agglomeration; Calcium carbonate; 660.284 2; 546.681 2

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Schnebelen, M. (2015). Étude de l'agglomération lors de la précipitation de carbonate de calcium par un procédé de carbonatation d'une suspension d'hydroxyde de calcium : Study of the agglomeration during the precipitation of calcium carbonate by a carbonation process of a calcium hydroxide suspension. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2015LORR0131

Chicago Manual of Style (16^th Edition):

Schnebelen, Mathilde. “Étude de l'agglomération lors de la précipitation de carbonate de calcium par un procédé de carbonatation d'une suspension d'hydroxyde de calcium : Study of the agglomeration during the precipitation of calcium carbonate by a carbonation process of a calcium hydroxide suspension.” 2015. Doctoral Dissertation, Université de Lorraine. Accessed April 12, 2021. http://www.theses.fr/2015LORR0131.

MLA Handbook (7^th Edition):

Schnebelen, Mathilde. “Étude de l'agglomération lors de la précipitation de carbonate de calcium par un procédé de carbonatation d'une suspension d'hydroxyde de calcium : Study of the agglomeration during the precipitation of calcium carbonate by a carbonation process of a calcium hydroxide suspension.” 2015. Web. 12 Apr 2021.

Vancouver:

Schnebelen M. Étude de l'agglomération lors de la précipitation de carbonate de calcium par un procédé de carbonatation d'une suspension d'hydroxyde de calcium : Study of the agglomeration during the precipitation of calcium carbonate by a carbonation process of a calcium hydroxide suspension. [Internet] [Doctoral dissertation]. Université de Lorraine; 2015. [cited 2021 Apr 12]. Available from: http://www.theses.fr/2015LORR0131.

Council of Science Editors:

Schnebelen M. Étude de l'agglomération lors de la précipitation de carbonate de calcium par un procédé de carbonatation d'une suspension d'hydroxyde de calcium : Study of the agglomeration during the precipitation of calcium carbonate by a carbonation process of a calcium hydroxide suspension. [Doctoral Dissertation]. Université de Lorraine; 2015. Available from: http://www.theses.fr/2015LORR0131

Delft University of Technology

3. Verdoes, D. Calcium carbonate precipitation in relation to detergent performance.

Degree: 1991, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a

Subjects/Keywords: calcium carbonate precipitation; detergents

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Verdoes, D. (1991). Calcium carbonate precipitation in relation to detergent performance. (Doctoral Dissertation). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a

Chicago Manual of Style (16^th Edition):

Verdoes, D. “Calcium carbonate precipitation in relation to detergent performance.” 1991. Doctoral Dissertation, Delft University of Technology. Accessed April 12, 2021. http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a.

MLA Handbook (7^th Edition):

Verdoes, D. “Calcium carbonate precipitation in relation to detergent performance.” 1991. Web. 12 Apr 2021.

Vancouver:

Verdoes D. Calcium carbonate precipitation in relation to detergent performance. [Internet] [Doctoral dissertation]. Delft University of Technology; 1991. [cited 2021 Apr 12]. Available from: http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a.

Council of Science Editors:

Verdoes D. Calcium carbonate precipitation in relation to detergent performance. [Doctoral Dissertation]. Delft University of Technology; 1991. Available from: http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; urn:NBN:nl:ui:24-uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a ; http://resolver.tudelft.nl/uuid:574ce0ac-3faf-4a4b-8ec0-18ee4fc85e5a

Virginia Tech

4. Richards, Colin Scott. Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging.

Degree: MS, Environmental Planning, 2016, Virginia Tech

URL: http://hdl.handle.net/10919/81180

► The formation of calcium carbonate (CaCO3) (i.e. scale) in potable water systems has long been a concern in water treatment and distribution. A literature review… (more)

Subjects/Keywords: Calcium carbonate; distribution system; precipitation; particle clogging; autogenous repair

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Richards, C. S. (2016). Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/81180

Chicago Manual of Style (16^th Edition):

Richards, Colin Scott. “Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging.” 2016. Masters Thesis, Virginia Tech. Accessed April 12, 2021. http://hdl.handle.net/10919/81180.

MLA Handbook (7^th Edition):

Richards, Colin Scott. “Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging.” 2016. Web. 12 Apr 2021.

Vancouver:

Richards CS. Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging. [Internet] [Masters thesis]. Virginia Tech; 2016. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10919/81180.

Council of Science Editors:

Richards CS. Calcium Carbonate Formation in Water Distribution Systems and Autogenous Repair of Leaks by Inert Particle Clogging. [Masters Thesis]. Virginia Tech; 2016. Available from: http://hdl.handle.net/10919/81180

5. Rizk, Nancy. Caractérisation du colmatage chimique et biologique et leurs interactions au sein d’un dispositif de micro-irrigation dans le contexte de la réutilisation des eaux usées épurées en irrigation : Characterization of chemical and biological clogging and their interactions within a micro-irrigation system in the context of the reuse of treated effluents in irrigation.

Degree: Docteur es, Sciences de l'environnement. Génie des procédés, 2017, Aix Marseille Université

URL: http://www.theses.fr/2017AIXM0224

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Dans un contexte de stress hydrique, la micro-irrigation avec des eaux usées traitées constitue une solution visant à réduire les dépenses en eau. Cependant, le… (more)

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Dans un contexte de stress hydrique, la micro-irrigation avec des eaux usées traitées constitue une solution visant à réduire les dépenses en eau. Cependant, le colmatage des goutteurs constitue une contrainte à l’utilisation de ces eaux bien chargées à cause des précipitations chimiques et du développement de biofilm. Les objectifs de cette étude sont de: a) Caractériser la précipitation des sels dissous en fonction des conditions opératoires, b) étudier le développement des biofilms sous différentes conditions hydrodynamiques, c) analyser l’interaction entre le carbonate de calcium et le développement du biofilm. En premier lieu une étude fut conduite sur l’impact de la température le pH et la pression partielle du CO2 sur la précipitation chimique. Cette étude a permis de quantifier l’augmentation de la masse du carbonate de calcium en fonction du pH et de la température. Les résultats expérimentaux ont permis de valider et de calibrer un modèle numérique (PHREEQC) qui permet de prédire la précipitation chimique pour une qualité d’eau donnée dans des conditions opératoire variées. Des expérimentations ont ensuite été réalisées à l’aide d’un banc d’essai d’irrigation pour étudier l’influence du carbonate de calcium sur la croissance des biofilms au niveau des conduites et des goutteurs. En parallèle un réacteur de Taylor-Couette fut utilisé pour étudier l’influence de la contrainte de cisaillement sur le développement des biofilms. Le biofilm a tendance à se développer selon la plus forte contrainte de cisaillement (4.4 Pa comparée à des contraintes de 2.2 et 0.7 Pa). Une précipitation du carbonate de calcium a été observée en interaction avec la croissance du biofilm.

In a context of water stress, micro-irrigation with treated wastewater is a solution to reduce water expenditure. However, the clogging of micro-irrigation systems constitutes a constraint on the use of these well-laden waters due to chemical precipitation and the development of biofilm. The objectives of this study are to: a) characterize precipitation of dissolved salts as a function of operating conditions, b) study the development of biofilms under different hydrodynamic conditions and c) analyze the interaction between calcium carbonate and the development of biofilm. First, a study was conducted on the impact of pH, temperature and partial pressure of CO2 on chemical precipitation. This study permits the quantiﬁcation of the increase in the mass of the precipitate produced in the form of calcite (calcium carbonate) as a function of the increase in pH and temperature. The experimental results allowed validation and calibration of the modeling of the precipitation under PHREEQC’s software. This numerical model allows prediction and quantiﬁcation of chemical precipitation for a given water quality under various operating conditions. Experiments were then carried out using an irrigation set-up to study the influence of calcium carbonate on the growth of biofilms inside pipes and drippers. In parallel, a Taylor-Couette reactor was used to study…

Advisors/Committee Members: Roche, Nicolas (thesis director).

Subjects/Keywords: Biofilm; Carbonate de calcium; Contrainte de cisaillement; Précipitation chimique; Phreeqc; Bioﬁlm; Calcium carbonate; Chemical precipitation; Phreeqc; Shear stress

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rizk, N. (2017). Caractérisation du colmatage chimique et biologique et leurs interactions au sein d’un dispositif de micro-irrigation dans le contexte de la réutilisation des eaux usées épurées en irrigation : Characterization of chemical and biological clogging and their interactions within a micro-irrigation system in the context of the reuse of treated effluents in irrigation. (Doctoral Dissertation). Aix Marseille Université. Retrieved from http://www.theses.fr/2017AIXM0224

Chicago Manual of Style (16^th Edition):

Rizk, Nancy. “Caractérisation du colmatage chimique et biologique et leurs interactions au sein d’un dispositif de micro-irrigation dans le contexte de la réutilisation des eaux usées épurées en irrigation : Characterization of chemical and biological clogging and their interactions within a micro-irrigation system in the context of the reuse of treated effluents in irrigation.” 2017. Doctoral Dissertation, Aix Marseille Université. Accessed April 12, 2021. http://www.theses.fr/2017AIXM0224.

MLA Handbook (7^th Edition):

Rizk, Nancy. “Caractérisation du colmatage chimique et biologique et leurs interactions au sein d’un dispositif de micro-irrigation dans le contexte de la réutilisation des eaux usées épurées en irrigation : Characterization of chemical and biological clogging and their interactions within a micro-irrigation system in the context of the reuse of treated effluents in irrigation.” 2017. Web. 12 Apr 2021.

Vancouver:

Rizk N. Caractérisation du colmatage chimique et biologique et leurs interactions au sein d’un dispositif de micro-irrigation dans le contexte de la réutilisation des eaux usées épurées en irrigation : Characterization of chemical and biological clogging and their interactions within a micro-irrigation system in the context of the reuse of treated effluents in irrigation. [Internet] [Doctoral dissertation]. Aix Marseille Université 2017. [cited 2021 Apr 12]. Available from: http://www.theses.fr/2017AIXM0224.

Council of Science Editors:

Rizk N. Caractérisation du colmatage chimique et biologique et leurs interactions au sein d’un dispositif de micro-irrigation dans le contexte de la réutilisation des eaux usées épurées en irrigation : Characterization of chemical and biological clogging and their interactions within a micro-irrigation system in the context of the reuse of treated effluents in irrigation. [Doctoral Dissertation]. Aix Marseille Université 2017. Available from: http://www.theses.fr/2017AIXM0224

KTH

6. ISHIKAWA, MAI. Syntes av hydroxyapatit/ nanocellulosa kompositer.

Degree: Chemical Science and Engineering (CHE), 2014, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170739

► Cellulose nanocrystals (CNC) are great candidates for composite materials. The reasons why CNCs are such attractive materials for them are due to their great… (more)

▼ Cellulose nanocrystals (CNC) are great candidates for composite materials. The reasons why CNCs are such attractive materials for them are due to their great mechanical properties, high aspect ratio and low density. On the other hand, hydroxyapatite (HAp) is a kind of calcium phosphate and a main component of bones and teeth. The purpose of the present study is to make oriented nano-sized composites with CNC and HAp. Although some researchers carried out to make CNC composites with HAp for biomedical materials, nano-sized and oriented ones haven’t been achieved yet. Also, films made of CNC and other compounds are known to be transparent and have good oxygen permeability. Especially when CNCs’ direction is in parallel, they show high strength. However most previous researches dealt with particles or plate-like minerals in inorganic/CNC films, so there is no case that coated CNCs themselves were aligned in the films. Therefore fabrication of composite-oriented thin films is quite unique and it will be a potential step for bone-like hierarchical structure. In experiment, certain amount of CNC suspension with functional groups were put into revised simulated body fluid (r-SBF) solutions which were adjusted between pH 6.9-7.9 to make the molar ratio of calcium ion per functional groups on CNC surfaces between 30-230. The suspensions were put into the ultrasonic bath for 15 minutes and stirred in the thermostatic oven at 37 ⁰C for 1 hour. The process of ultrasound and stirring in oven was repeated 1-3 times depending on conditions. Precipitated products were collected with the centrifuge instrument and dried with the freeze dryer. Functional groups induced HAp’s nucleation and the HAp/CNC composites could be obtained under control of molar ratio of calcium ions per functional groups on CNC and pH. Morphology of the composites could be determined by pH and HAp content could be controlled between 25-75 wt% by initial molar ratio. The suspension having the composites synthesized in pH 7.9 with low initial molar ratio was dropped on superhydrophilic glass substrates. At the moment, the substrates were set with leans of 20 degrees. Then they were dried at 60 °C for 3 hours and transparent films containing 25-40 wt% of HAp were obtained. The transmittances of the films were more than 90 % and their thicknesses were 2.2-4.2 μm. The films were suggested to have oriented structure by polarization microscope when the shape of the composites were needle-like homogeneously and independent each other. From the results from SEM, they were aligned longitudinally at both ends of the film and laterally at the upper middle part of the films. It is considered that controlling drying direction influenced on the orientation. The current study should become a promising step to build up a bone-like hierarchical structure artificially.

Subjects/Keywords: Cellulose nanocrystals; biomedical materials; artificial bone; precipitation; calcium carbonate; Nano Technology; Nanoteknik

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APA (6^th Edition):

ISHIKAWA, M. (2014). Syntes av hydroxyapatit/ nanocellulosa kompositer. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170739

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

ISHIKAWA, MAI. “Syntes av hydroxyapatit/ nanocellulosa kompositer.” 2014. Thesis, KTH. Accessed April 12, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170739.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

ISHIKAWA, MAI. “Syntes av hydroxyapatit/ nanocellulosa kompositer.” 2014. Web. 12 Apr 2021.

Vancouver:

ISHIKAWA M. Syntes av hydroxyapatit/ nanocellulosa kompositer. [Internet] [Thesis]. KTH; 2014. [cited 2021 Apr 12]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170739.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

ISHIKAWA M. Syntes av hydroxyapatit/ nanocellulosa kompositer. [Thesis]. KTH; 2014. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170739

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Houston

7. -9978-6263. Carbon Dioxide Sequestration through Microbially-Induced Calcium Carbonate Precipitation Using Ureolytic Environmental Microorganisms.

Degree: PhD, Environmental Engineering, 2015, University of Houston

URL: http://hdl.handle.net/10657/2021

► The development of affordable and eco-friendly strategies for carbon dioxide sequestration has become a matter of paramount importance to reduce or mitigate the effects of… (more)

Subjects/Keywords: Calcium carbonate; Precipitation; CO2 sequestration; Bacterial isolates; Bacterial consortia; Cave; Travertine; Sporosarcina pasteurii

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

-9978-6263. (2015). Carbon Dioxide Sequestration through Microbially-Induced Calcium Carbonate Precipitation Using Ureolytic Environmental Microorganisms. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/2021

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-9978-6263. “Carbon Dioxide Sequestration through Microbially-Induced Calcium Carbonate Precipitation Using Ureolytic Environmental Microorganisms.” 2015. Doctoral Dissertation, University of Houston. Accessed April 12, 2021. http://hdl.handle.net/10657/2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-9978-6263. “Carbon Dioxide Sequestration through Microbially-Induced Calcium Carbonate Precipitation Using Ureolytic Environmental Microorganisms.” 2015. Web. 12 Apr 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-9978-6263. Carbon Dioxide Sequestration through Microbially-Induced Calcium Carbonate Precipitation Using Ureolytic Environmental Microorganisms. [Internet] [Doctoral dissertation]. University of Houston; 2015. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10657/2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-9978-6263. Carbon Dioxide Sequestration through Microbially-Induced Calcium Carbonate Precipitation Using Ureolytic Environmental Microorganisms. [Doctoral Dissertation]. University of Houston; 2015. Available from: http://hdl.handle.net/10657/2021

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Arizona

8. Reitemeier, Robert Francis, 1912-. The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutions .

Degree: 1938, University of Arizona

URL: http://hdl.handle.net/10150/565626

Subjects/Keywords: Phosphates.; Calcium carbonate.; Precipitation (Chemistry); Ammonia.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Reitemeier, Robert Francis, 1. (1938). The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutions . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/565626

Chicago Manual of Style (16^th Edition):

Reitemeier, Robert Francis, 1912-. “The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutions .” 1938. Doctoral Dissertation, University of Arizona. Accessed April 12, 2021. http://hdl.handle.net/10150/565626.

MLA Handbook (7^th Edition):

Reitemeier, Robert Francis, 1912-. “The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutions .” 1938. Web. 12 Apr 2021.

Vancouver:

Reitemeier, Robert Francis 1. The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutions . [Internet] [Doctoral dissertation]. University of Arizona; 1938. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10150/565626.

Council of Science Editors:

Reitemeier, Robert Francis 1. The action of metaphosphates in preventing the precipitation of calcium carbonate from ammoniacal solutions . [Doctoral Dissertation]. University of Arizona; 1938. Available from: http://hdl.handle.net/10150/565626

UCLA

9. Wong, Elaine. Onsite Defluoridation Systems for Drinking Water Production.

Degree: Civil Engineering, 2017, UCLA

URL: http://www.escholarship.org/uc/item/2z53z8mm

► Fluoride in drinking water has several effects on the teeth and bones. At concentrations of 1-1.5 mg/L, fluoride can strengthen enamel, improving dental health, but… (more)

▼ Fluoride in drinking water has several effects on the teeth and bones. At concentrations of 1-1.5 mg/L, fluoride can strengthen enamel, improving dental health, but at concentrations above 1.5 to 4 mg/L can cause dental fluorosis. At concentrations of 4 -10 mg/L, skeletal fluorosis can occur. There are many areas of the world that have excessive fluoride in drinking water, such as China, India, Sri Lanka, and the Rift Valley countries in Africa. Treatment solutions are needed, especially in poor areas where drinking water treatment plants are not available. On-site or individual treatment alternatives can be attractive if constructed from common materials and if simple enough to be constructed and maintained by users. This dissertation investigates using calcium carbonate as a cost effective sorbent for an onsite defluoridation drinking water system. Batch and column experiments were performed to characterize F- removal properties. Fluoride sorption was described by Freundlich, Langmuir and Dubinin- Radushkevich isotherm models, and it was found that the equilibrium time was approximately 3 hours, with approximately 77% of equilibrium concentration reached within 1 hour. Granular calcium carbonate was found to have comparable F- removal abilities to the commercial ion exchange resins and possessed higher removal effectiveness compared to calcium containing eggshells and seashells. It was also found that the anion Cl- did not compete with F- at typical drinking water concentrations, having little impact on the effectiveness of the treatment system. A fluoride removal system is proposed that can be used at home and can be maintained by users. Different calcium phosphate systems were also analyzed to find ways to improve fluoride removal rates. Adding phosphoric acid and calcium carbonate were effective in increasing fluoride removal rates. However, there would need to be a significant amount of phosphoric acid and initial pH would need to be approximately 1.5 or less to have optimal removal rates. We found the best results by using Ca(OH)2 and NaH2PO4,with fluoride concentrations decreasing to 0.003 mg/L F-. Through this work, we can be a step closer to bringing safe drinking water to those that do not have access to it.

Subjects/Keywords: Environmental engineering; Environmental health; Civil engineering; adsorption; calcium carbonate; calcium phosphate systems; defluoridation; on-site water treatment; precipitation

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APA (6^th Edition):

Wong, E. (2017). Onsite Defluoridation Systems for Drinking Water Production. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/2z53z8mm

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wong, Elaine. “Onsite Defluoridation Systems for Drinking Water Production.” 2017. Thesis, UCLA. Accessed April 12, 2021. http://www.escholarship.org/uc/item/2z53z8mm.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wong, Elaine. “Onsite Defluoridation Systems for Drinking Water Production.” 2017. Web. 12 Apr 2021.

Vancouver:

Wong E. Onsite Defluoridation Systems for Drinking Water Production. [Internet] [Thesis]. UCLA; 2017. [cited 2021 Apr 12]. Available from: http://www.escholarship.org/uc/item/2z53z8mm.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wong E. Onsite Defluoridation Systems for Drinking Water Production. [Thesis]. UCLA; 2017. Available from: http://www.escholarship.org/uc/item/2z53z8mm

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Sellami, Jawhar. Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés : Design, implementation, development and modeling of precipitation reactors using fluidized bed technology.

Degree: Docteur es, Génie des procédés et des produits, 2008, Lorraine INP

URL: http://www.theses.fr/2008INPL088N

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L’objectif de ce travail est de concevoir, développer, mettre en œuvre et optimiser une technologie continue permettant une bonne maîtrise des réactions de précipitation, processus… (more)

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L’objectif de ce travail est de concevoir, développer, mettre en œuvre et optimiser une technologie continue permettant une bonne maîtrise des réactions de précipitation, processus chimique rapide donnant naissance à une phase solide. Ce précipiteur est un réacteur multifonctionnel à lit fluidisé qui n’a pas connu le même essor que les cristallisoirs à lit fluidisé. Deux approches expérimentales ont été adoptées : (1) l’étude des phénomènes de mélange des réactifs et (2) l’étude de l’influence des conditions opératoires sur la précipitation d’un produit modèle. Le produit modèle choisi pour cette étude est la calcite, le polymorphe le plus stable du carbonate de calcium qui possède trois polymorphes : la vaterite, l’aragonite et la calcite. Cette dernière est obtenue via la réaction de précipitation entre les solutions de chlorure de calcium et de carbonate de sodium à une température de 20° C et en présence d’un agent complexant (citrate de sodium) pour orienter la forme cristalline recherchée. Une étude cinétique a été menée pour la détermination des cinétiques de nucléation et de croissance cristalline de la calcite en milieu citrate. Le réacteur à lit fluidisé, de volume de 10 L, constitué de deux zones : cylindrique de fluidisation et de classification des particules et cylindro-conique de décantation, a été conçu au Laboratoire des Sciences du Génie Chimique. L’étude du mélange global, réalisée à l’aide de la réaction de décoloration acide-base et l’étude hydrodynamique, réalisée à l’aide de suspensions de microbilles, ont permis de développer et d’optimiser ce réacteur multifonctionnel. La faisabilité de la précipitation de la calcite en lit fluidisé a été ensuite vérifiée. Les expériences effectuées en présence d’une charge solide conséquente ont permis de diminuer la sursaturation et de favoriser la croissance cristalline. Le précipité obtenu présente une distribution de taille relativement étroite et la forme des particules obtenues est sensiblement sphérique. Enfin, des essais de modélisation du réacteur à lit fluidisé ont été entrepris pour réaliser des simulations à l’aide du code de calcul commercial FLUENT

The objective of this work is to conceive, develop, implement and to optimize a continuous technology allowing a good control of the precipitation reactions, fast chemical process, giving birth to a solid phase. This precipitor is a multipurpose engine with fluidized bed which did not make the same great strides like fluidized bed crystallizers. Two experimental approaches were adopted : (1) the study of the mixing phenomena of the reagents and (2) the study of the influence of the operating conditions on the precipitation of a model product. The model product selected for this study is the calcite, the polymorphic most stable phase of calcium carbonate which has three polymorphs: vaterite, aragonite and calcite. The latter is obtained by the precipitation reaction between the calcium chloride and sodium carbonate solutions at a temperature of 20° C and a complexing agent (sodium citrate) to have…

Advisors/Committee Members: Plasari, Edouard (thesis director), Muhr, Hervé (thesis director).

Subjects/Keywords: Précipitation; Réacteur multifonctionnel; Réacteur à lit fluidisé; Polymorphisme; Calcite; Mélange; CFD; Citrate de sodium; Carbonate de calcium; Precipitation; Mixing; Polymorphism; Citrate; Calcium carbonate; Fluidized bed; CFD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sellami, J. (2008). Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés : Design, implementation, development and modeling of precipitation reactors using fluidized bed technology. (Doctoral Dissertation). Lorraine INP. Retrieved from http://www.theses.fr/2008INPL088N

Chicago Manual of Style (16^th Edition):

Sellami, Jawhar. “Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés : Design, implementation, development and modeling of precipitation reactors using fluidized bed technology.” 2008. Doctoral Dissertation, Lorraine INP. Accessed April 12, 2021. http://www.theses.fr/2008INPL088N.

MLA Handbook (7^th Edition):

Sellami, Jawhar. “Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés : Design, implementation, development and modeling of precipitation reactors using fluidized bed technology.” 2008. Web. 12 Apr 2021.

Vancouver:

Sellami J. Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés : Design, implementation, development and modeling of precipitation reactors using fluidized bed technology. [Internet] [Doctoral dissertation]. Lorraine INP; 2008. [cited 2021 Apr 12]. Available from: http://www.theses.fr/2008INPL088N.

Council of Science Editors:

Sellami J. Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés : Design, implementation, development and modeling of precipitation reactors using fluidized bed technology. [Doctoral Dissertation]. Lorraine INP; 2008. Available from: http://www.theses.fr/2008INPL088N

University of Cambridge

11. Clarà Saracho, Alexandra. Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands.

Degree: PhD, 2020, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/308305

► Tangential flow-induced erosion poses a major threat to a wide variety of engineering structures, including earth-filled embankment dams and oil and gas extraction wells. Current… (more)

▼ Tangential flow-induced erosion poses a major threat to a wide variety of engineering structures, including earth-filled embankment dams and oil and gas extraction wells. Current mitigation solutions are limited to mechanical approaches (e.g. filters, gravel packs), relying on the fulfilment of a ‘paradoxical permeability-retention criterion’; and to the use of emergency hydraulic head reduction which limits serviceability. In this context, microbial induced calcium carbonate (CaCO3) precipitation (MICP) could be used to enhance the erosion performance of soils. This research investigates the influence of the CaCO3 microstructure on the macromechanical erosion response of fine sands by combining instrumental techniques for characterisation, with element-scale flume testing and controlled modelling of a heterogeneous layered system. The flume tests employed a newly designed Erosion Function Apparatus (EFA) and testing procedure to measure surface erosion, focusing on fine-coarse sand interfaces treated with the same soil bacterium (Sporosarcina pasteurii), but varying urea-CaCl2 solution concentrations. The key aspect examined was the role of CaCO3 micro-architecture – comprised of the CaCO3 vertical profile, crystal size and distribution, and morphology. Results showed that higher CaCO3contents, bigger crystals, and cohesive bonds yield lower erodibility values. It was also seen that crystal growth mechanisms could change depending on bacterial distributions, urea-CaCl2 solution concentrations, and the pore space of the original granular material. As MICP moves from research into practice, the effect of bacterial strain on CaCO3 precipitation also needs to be considered. The morphology, mineralogy and crystalline properties of biominerals precipitated by three different ureolytic microorganisms were henceforth investigated. These strains were: S. pasteurii, S. aquimarina, and S. newyorkensis – a newly isolated microbe from the Daini-Atsumi Knoll in offshore Japan. From in vitro experiments it was found that CaCO3 polymorph selection can be controlled through selection of ureolytic strain with appropriate precipitation kinetics, and that metastable polymorph stabilisation is dependent on the kinetics of the mobile water contained within the crystal structure. Finally, the Cambridge Plane-Strain Sand Production Apparatus (SPA), through the incorporation of Particle Image Velocimetry, was used to examine the effect of bacterial strain-specific MICP on the deformation mechanisms of a layered granular system resulting from lateral unloading due to erosion. It was observed that MICP treatment reduces sand production at the expense of ductility, however, this behaviour becomes more prominent with increasing CaCO3 polymorph stability – namely, amorphous calcium carbonate (ACC), vaterite, and calcite. Correlations between microstructual characterisation, and EFA and SPA results highlighted the potential for designing bio-reinforced geo-materials that capitalise on the different CaCO3 microstructural features.

Subjects/Keywords: Erosion; Reinforced soils; Microbial induced calcium carbonate precipitation (MICP); Sands; Sand production; Dams; Calcium carbonate polymorphs; Fabric/structure of soils; Laboratory tests

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APA (6^th Edition):

Clarà Saracho, A. (2020). Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/308305

Chicago Manual of Style (16^th Edition):

Clarà Saracho, Alexandra. “Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands.” 2020. Doctoral Dissertation, University of Cambridge. Accessed April 12, 2021. https://www.repository.cam.ac.uk/handle/1810/308305.

MLA Handbook (7^th Edition):

Clarà Saracho, Alexandra. “Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands.” 2020. Web. 12 Apr 2021.

Vancouver:

Clarà Saracho A. Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands. [Internet] [Doctoral dissertation]. University of Cambridge; 2020. [cited 2021 Apr 12]. Available from: https://www.repository.cam.ac.uk/handle/1810/308305.

Council of Science Editors:

Clarà Saracho A. Effect of Bacterial Strain on MICP and its Application for the Erosion Control of Fine Sands. [Doctoral Dissertation]. University of Cambridge; 2020. Available from: https://www.repository.cam.ac.uk/handle/1810/308305

McMaster University

12. Duranza, Francis Cristian. Preliminary Investigations of CaCO3 Nucleation in Precipitation Reactions from Quasi-Homogeneous Solution.

Degree: MSc, 1976, McMaster University

URL: http://hdl.handle.net/11375/19296

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An analysis of reported and theoretical methods of precipitating calcium carbonate from aqueous solution is presented, with emphasis on methods that generate the anion… (more)

Subjects/Keywords: preliminary; investigations; nucleation; precipitation; reactions; solution; calcium; carbonate; anion

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Duranza, F. C. (1976). Preliminary Investigations of CaCO3 Nucleation in Precipitation Reactions from Quasi-Homogeneous Solution. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/19296

Chicago Manual of Style (16^th Edition):

Duranza, Francis Cristian. “Preliminary Investigations of CaCO3 Nucleation in Precipitation Reactions from Quasi-Homogeneous Solution.” 1976. Masters Thesis, McMaster University. Accessed April 12, 2021. http://hdl.handle.net/11375/19296.

MLA Handbook (7^th Edition):

Duranza, Francis Cristian. “Preliminary Investigations of CaCO3 Nucleation in Precipitation Reactions from Quasi-Homogeneous Solution.” 1976. Web. 12 Apr 2021.

Vancouver:

Duranza FC. Preliminary Investigations of CaCO3 Nucleation in Precipitation Reactions from Quasi-Homogeneous Solution. [Internet] [Masters thesis]. McMaster University; 1976. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/11375/19296.

Council of Science Editors:

Duranza FC. Preliminary Investigations of CaCO3 Nucleation in Precipitation Reactions from Quasi-Homogeneous Solution. [Masters Thesis]. McMaster University; 1976. Available from: http://hdl.handle.net/11375/19296

University of Illinois – Urbana-Champaign

13. Dehoff, Karl. Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration.

Degree: MS, 0231, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/16857

► This study examines the reaction between carbonate and calcium to precipitate calcium carbonate in an experimental model. This model is a small micro-fluidic device that… (more)

Subjects/Keywords: Carbon Sequestration; Calcium Carbonate Precipitation; Microfluidics; Pore-Scale; Transverse Mixing

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APA (6^th Edition):

Dehoff, K. (2010). Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/16857

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dehoff, Karl. “Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration.” 2010. Thesis, University of Illinois – Urbana-Champaign. Accessed April 12, 2021. http://hdl.handle.net/2142/16857.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dehoff, Karl. “Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration.” 2010. Web. 12 Apr 2021.

Vancouver:

Dehoff K. Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2010. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2142/16857.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dehoff K. Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration. [Thesis]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/16857

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Utah State University

14. Hassett, John J. Magnesium Ion Inhibiton of Calcium Carbonate Precipitation and its Relation to Water Quality.

Degree: PhD, Plants, Soils, and Climate, 1970, Utah State University

URL: https://digitalcommons.usu.edu/etd/4574

► The effect of Mg⁺⁺ ion on the solubility of calcium carbonate was determined using P. K. Weyls "carbonate saturometer." The amount of calcium carbonate… (more)

Subjects/Keywords: magnesium ion; inhibition; calcium carbonate; precipitation; relation; water quality; Other Chemistry; Soil Science

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APA (6^th Edition):

Hassett, J. J. (1970). Magnesium Ion Inhibiton of Calcium Carbonate Precipitation and its Relation to Water Quality. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/4574

Chicago Manual of Style (16^th Edition):

Hassett, John J. “Magnesium Ion Inhibiton of Calcium Carbonate Precipitation and its Relation to Water Quality.” 1970. Doctoral Dissertation, Utah State University. Accessed April 12, 2021. https://digitalcommons.usu.edu/etd/4574.

MLA Handbook (7^th Edition):

Hassett, John J. “Magnesium Ion Inhibiton of Calcium Carbonate Precipitation and its Relation to Water Quality.” 1970. Web. 12 Apr 2021.

Vancouver:

Hassett JJ. Magnesium Ion Inhibiton of Calcium Carbonate Precipitation and its Relation to Water Quality. [Internet] [Doctoral dissertation]. Utah State University; 1970. [cited 2021 Apr 12]. Available from: https://digitalcommons.usu.edu/etd/4574.

Council of Science Editors:

Hassett JJ. Magnesium Ion Inhibiton of Calcium Carbonate Precipitation and its Relation to Water Quality. [Doctoral Dissertation]. Utah State University; 1970. Available from: https://digitalcommons.usu.edu/etd/4574

University of Cambridge

15. Wang, Yuze. Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale.

Degree: PhD, 2019, University of Cambridge

URL: https://doi.org/10.17863/CAM.35552 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763894

► Microbial-Induced Calcium Carbonate (CaCO3) Precipitation (MICP) is a biological process in which microbial activities alter the surrounding aqueous environment and induce CaCO3 precipitation. Because the… (more)

▼ Microbial-Induced Calcium Carbonate (CaCO3) Precipitation (MICP) is a biological process in which microbial activities alter the surrounding aqueous environment and induce CaCO3 precipitation. Because the formed CaCO3 crystals can bond soil particles and improve the mechanical properties of soils such as strength, MICP has been explored for potential engineering applications such as soil stabilisation. However, it has been difficult to control and predict the properties of CaCO3 precipitates, thus making it very challenging to achieve homogeneous MICP-treated soils with the desired mechanical properties. This PhD study investigates MICP at both micro and macro scales to improve the micro-scale understandings of MICP which can be applied at the macro-scale for improving the homogeneity and mechanical properties of MICP-treated sand. A microfluidic chip which models a sandy soil matrix was designed and fabricated to investigate the micro-scale fundamentals of MICP. The first important finding was that, during MICP processes, phase transformation of CaCO3 can occur, which results in smaller and less stable CaCO3 crystals dissolving at the expense of growth of larger and more stable CaCO3 crystals. In addition, it was found that bacteria can aggregate after being mixed with cementation solution, and both bacterial density and the concentration of cementation solution affect the size of aggregates, which may consequently affect the transport and distribution of bacteria in a soil matrix. Furthermore, bacterial density was found to have a profound effect on both the growth kinetics and characteristics of CaCO3. A higher bacterial density resulted in a quicker formation of a larger amount of smaller crystals, whereas a lower bacterial density resulted in a slower formation of fewer but larger crystals. Based on the findings from micro-scale experiments, upscaling experiments were conducted on sandy soils to investigate the effect of injection interval on the strength of MICP treated soils and the effects of bacterial density and concentration of cementation solution on the uniformity of MICP treated soils. Increasing the interval between injections of cementation solution (from 4 h to 24 h) increased the average size of CaCO3 crystals and the resulting strength of MICP-treated sand. An optimised combination of bacterial density and cementation solution concentration resulted in a relative homogeneous distribution of CaCO3 content and suitable strength and stiffness of MICP-treated sand. This thesis study revealed that a microfluidic chip is a very useful tool to investigate the micro-scale fundamentals of MICP including the behaviour of bacteria and the process of CaCO3 precipitation. The optimised MICP protocols will be useful for improving the engineering performance of MICP-treated sandy soils such as uniformity and strength.

Subjects/Keywords: 624.1; Microbial-Induced Calcium Carbonate Precipitation (MICP); soil stabilisation; micro-scale; macro-scale; particle-scale; crystal growth; bacteria; microscopy; ureolysis; Sporosarcina pasteurii; phase transformation; bacterial growth

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APA (6^th Edition):

Wang, Y. (2019). Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.35552 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763894

Chicago Manual of Style (16^th Edition):

Wang, Yuze. “Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale.” 2019. Doctoral Dissertation, University of Cambridge. Accessed April 12, 2021. https://doi.org/10.17863/CAM.35552 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763894.

MLA Handbook (7^th Edition):

Wang, Yuze. “Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale.” 2019. Web. 12 Apr 2021.

Vancouver:

Wang Y. Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Apr 12]. Available from: https://doi.org/10.17863/CAM.35552 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763894.

Council of Science Editors:

Wang Y. Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.35552 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.763894

Utah State University

16. Dabb, Lyle M. Calcium Carbonate Dissolution and Precipitation in Water: Factors Affecting the Carbonate Saturometer Method.

Degree: MS, Plants, Soils, and Climate, 1971, Utah State University

URL: https://digitalcommons.usu.edu/etd/2991

► The carbonate saturometer method developed by Weyl (1961) was studied in respect to the effect of several variables on the solubility of carbonates. The… (more)

Subjects/Keywords: calcium carbonate; dissolution; precipitation; water; factors; saturometer; method; Chemistry; Soil Science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dabb, L. M. (1971). Calcium Carbonate Dissolution and Precipitation in Water: Factors Affecting the Carbonate Saturometer Method. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/2991

Chicago Manual of Style (16^th Edition):

Dabb, Lyle M. “Calcium Carbonate Dissolution and Precipitation in Water: Factors Affecting the Carbonate Saturometer Method.” 1971. Masters Thesis, Utah State University. Accessed April 12, 2021. https://digitalcommons.usu.edu/etd/2991.

MLA Handbook (7^th Edition):

Dabb, Lyle M. “Calcium Carbonate Dissolution and Precipitation in Water: Factors Affecting the Carbonate Saturometer Method.” 1971. Web. 12 Apr 2021.

Vancouver:

Dabb LM. Calcium Carbonate Dissolution and Precipitation in Water: Factors Affecting the Carbonate Saturometer Method. [Internet] [Masters thesis]. Utah State University; 1971. [cited 2021 Apr 12]. Available from: https://digitalcommons.usu.edu/etd/2991.

Council of Science Editors:

Dabb LM. Calcium Carbonate Dissolution and Precipitation in Water: Factors Affecting the Carbonate Saturometer Method. [Masters Thesis]. Utah State University; 1971. Available from: https://digitalcommons.usu.edu/etd/2991

17. Morasko, Vincent John. Kinetics of thermally inactivated ureases and management of sand production through ureolysis-induced mineral precipitation.

Degree: MS, College of Engineering, 2018, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/14691

► Biocement has the potential to seal subsurface hydraulic fractures, manipulate subsurface flow paths to enhance oil recovery, treat fractured cement, stabilize soil structures and minimize… (more)

▼ Biocement has the potential to seal subsurface hydraulic fractures, manipulate subsurface flow paths to enhance oil recovery, treat fractured cement, stabilize soil structures and minimize dust dispersal. Biocement can be formed using the urease enzyme from various sources (bacteria, plant, or fungi) to break down urea into carbonate, combining with calcium for use in engineering applications such as biocement production. Higher temperatures, pressures, and extreme pH conditions may be encountered as these engineering applications expand deeper into the subsurface. Temperatures beyond 1000 meters can exceed 80°C, potentially rapidly inactivating the enzyme. The first part of this study focused on monitoring urea hydrolysis catalyzed by jack bean urease at temperatures ranging from 20-80°C. An increasing rate of urease inactivation was observed with increasing temperatures and first-order models described the kinetics of urea hydrolysis and enzyme inactivation properly. The second part of this study focused on developing a technology to mitigate sand transport in oil and gas wells. This study addressed a method to cement sand in the subsurface so that it is not returned when oil or gas is extracted. As the sand leaves the formation, it can cause damage in the subsurface, leading to economic concerns, as well as reducing the lifespan of pumps, piping and other components on the well pad. A reactor system was developed to mimic a subsurface oil well that produces sand. Biocement production was promoted within the reactor, utilizing common sources of urease (Sporosarcina pasteurii and Canavalia ensiformis or jack bean meal). The resultant calcium carbonate/sand mass was subjected to elevated flowrates, simulating field conditions where sand is potentially fluidized and potentially transported into the wellbore. It was shown that biocement can reduce sand transport while allowing for higher flow rates than conditions without biocement. The findings from this study broaden the potential application range of biocementation technologies into higher temperature environments. Applying biocement specifically to sand mitigation may have significant environmental, economic, and safety implications within the natural resource industry. Advisors/Committee Members: Chairperson, Graduate Committee: Robin Gerlach, Adrienne Phillips (co-chair) (advisor).

Subjects/Keywords: Calcium carbonate; Urea; Enzymes; High temperatures; Sand; Precipitation (Chemistry)

…microbe and plant sources to induce calcium carbonate precipitation to prevent sand from being… …transported into an oil-producing wellbore. Urea hydrolysis-induced calcium carbonate precipitation… …either from bacteria, plants, or fungi). 1-4 Calcium carbonate precipitation has the… …induced calcium carbonate precipitation (TICP). For TICP to occur, urea spontaneously… …calcium carbonate precipitation. 1-4 Engineered mineralization has the potential to be…

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APA (6^th Edition):

Morasko, V. J. (2018). Kinetics of thermally inactivated ureases and management of sand production through ureolysis-induced mineral precipitation. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/14691

Chicago Manual of Style (16^th Edition):

Morasko, Vincent John. “Kinetics of thermally inactivated ureases and management of sand production through ureolysis-induced mineral precipitation.” 2018. Masters Thesis, Montana State University. Accessed April 12, 2021. https://scholarworks.montana.edu/xmlui/handle/1/14691.

MLA Handbook (7^th Edition):

Morasko, Vincent John. “Kinetics of thermally inactivated ureases and management of sand production through ureolysis-induced mineral precipitation.” 2018. Web. 12 Apr 2021.

Vancouver:

Morasko VJ. Kinetics of thermally inactivated ureases and management of sand production through ureolysis-induced mineral precipitation. [Internet] [Masters thesis]. Montana State University; 2018. [cited 2021 Apr 12]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/14691.

Council of Science Editors:

Morasko VJ. Kinetics of thermally inactivated ureases and management of sand production through ureolysis-induced mineral precipitation. [Masters Thesis]. Montana State University; 2018. Available from: https://scholarworks.montana.edu/xmlui/handle/1/14691

Arizona State University

18. Kim, Daehyun. Pore-scale Study of Bio-mineral and Bio-gas Formations in Porous Media.

Degree: Civil, Environmental and Sustainable Engineering, 2019, Arizona State University

URL: http://repository.asu.edu/items/55491

Subjects/Keywords: Civil engineering; Biogeochemistry; Environmental engineering; Biogas; Biomineral; Denitrification; Microbially Induced Calcium Carbonate Precipitation; Porous media; Precipitation

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APA (6^th Edition):

Kim, D. (2019). Pore-scale Study of Bio-mineral and Bio-gas Formations in Porous Media. (Doctoral Dissertation). Arizona State University. Retrieved from http://repository.asu.edu/items/55491

Chicago Manual of Style (16^th Edition):

Kim, Daehyun. “Pore-scale Study of Bio-mineral and Bio-gas Formations in Porous Media.” 2019. Doctoral Dissertation, Arizona State University. Accessed April 12, 2021. http://repository.asu.edu/items/55491.

MLA Handbook (7^th Edition):

Kim, Daehyun. “Pore-scale Study of Bio-mineral and Bio-gas Formations in Porous Media.” 2019. Web. 12 Apr 2021.

Vancouver:

Kim D. Pore-scale Study of Bio-mineral and Bio-gas Formations in Porous Media. [Internet] [Doctoral dissertation]. Arizona State University; 2019. [cited 2021 Apr 12]. Available from: http://repository.asu.edu/items/55491.

Council of Science Editors:

Kim D. Pore-scale Study of Bio-mineral and Bio-gas Formations in Porous Media. [Doctoral Dissertation]. Arizona State University; 2019. Available from: http://repository.asu.edu/items/55491

University of Exeter

19. Whittamore, Jonathan Mark. The regulation of intestinal bicarbonate secretion by marine teleost fish.

Degree: PhD, 2008, University of Exeter

URL: https://ore.exeter.ac.uk/repository/handle/10036/42297 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546911

► In seawater, drinking is a fundamental part of the osmoregulatory strategy for teleost fish, and presents a unique challenge. The intestine has an established role… (more)

▼ In seawater, drinking is a fundamental part of the osmoregulatory strategy for teleost fish, and presents a unique challenge. The intestine has an established role in osmoregulation, and its ability to effectively absorb fluid from imbibed seawater is crucial to compensating for water losses to the surrounding hyperosmotic environment. Alongside solute-linked water transport (driven by NaCl cotransport), intestinal bicarbonate (HCO3-) secretion also benefits fluid absorption directly (via apical Cl-/HCO3- exchange), and indirectly through the formation of calcium carbonate (CaCO3) thus removing the osmotic influence of Ca2+ within the gut fluid. For the European flounder (Platichthys flesus), elevated luminal Ca2+ has proven to be a specific, potent stimulator of HCO3- secretion both in vitro and in vivo where these actions are presumably modulated by an extracellular Ca2+-sensing receptor (CaR). The focus of this work was to learn more about how intestinal HCO3- secretion is regulated, the role of Ca2+, and more specifically the CaR. To achieve this, in vitro ‘gut sac’ experiments investigated how luminal Ca2+ influenced HCO3- secretion, and associated ion and fluid transport. Contrary to expectation, increasing Ca2+ from 5 to 20 mM did not stimulate HCO3- secretion. In an attempt to elucidate the role of CaCO3 precipitation in fluid absorption, and further explore the physiological implications of HCO3- secretion, the intestine was perfused in vivo with salines containing varying concentrations of Ca2+ (10, 40 and 90 mM). The production and secretion of HCO3-, in addition to CaCO3 formation increased accordingly with Ca2+, and was associated with a dramatic 25 % rise in the fraction of fluid absorbed by the gut. Additional in vitro experiments, utilising the Ussing chamber, helped establish some of the characteristics of intestinal HCO3- secretion by the euryhaline killifish (Fundulus heteroclitus), but was unresponsive to elevated mucosal Ca2+. Further attempts to potentiate the activity of the CaR, and application of the receptor agonists gadolinium (Gd3+) and neomycin, failed to produce responses consistent with the effect of Ca2+ observed previously, either in vitro or in vivo. With no evidence supporting a direct role for an extracellular, intestinal CaR in HCO3- secretion it was argued that secretion would be principally regulated by two factors, the ability of the epithelia to generate high levels of intracellular HCO3- and the rate of CaCO3 formation.

Subjects/Keywords: 571.1; bicarbonate secretion; osmoregulation; calcium-sensing receptor; chloride-bicarbonate exchange; teleost fish; carbonate precipitation; water transport; calcium; in vitro; in vivo

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APA (6^th Edition):

Whittamore, J. M. (2008). The regulation of intestinal bicarbonate secretion by marine teleost fish. (Doctoral Dissertation). University of Exeter. Retrieved from https://ore.exeter.ac.uk/repository/handle/10036/42297 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546911

Chicago Manual of Style (16^th Edition):

Whittamore, Jonathan Mark. “The regulation of intestinal bicarbonate secretion by marine teleost fish.” 2008. Doctoral Dissertation, University of Exeter. Accessed April 12, 2021. https://ore.exeter.ac.uk/repository/handle/10036/42297 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546911.

MLA Handbook (7^th Edition):

Whittamore, Jonathan Mark. “The regulation of intestinal bicarbonate secretion by marine teleost fish.” 2008. Web. 12 Apr 2021.

Vancouver:

Whittamore JM. The regulation of intestinal bicarbonate secretion by marine teleost fish. [Internet] [Doctoral dissertation]. University of Exeter; 2008. [cited 2021 Apr 12]. Available from: https://ore.exeter.ac.uk/repository/handle/10036/42297 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546911.

Council of Science Editors:

Whittamore JM. The regulation of intestinal bicarbonate secretion by marine teleost fish. [Doctoral Dissertation]. University of Exeter; 2008. Available from: https://ore.exeter.ac.uk/repository/handle/10036/42297 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546911

20. Langerak, van, E.P.A. Control of calcium carbonate precipitation in anaerobic reactors.

Degree: 1998, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/42542 ; urn:nbn:nl:ui:32-42542 ; urn:nbn:nl:ui:32-42542 ; http://library.wur.nl/WebQuery/wurpubs/42542

► Anaerobic treatment of waste waters with a high calcium content may lead to excessive precipitation of calcium carbonate. So far, no proper methods were… (more)

Subjects/Keywords: anaërobe behandeling; afvalwater; calcium; calciumcarbonaat; neerslag; anaërobe omstandigheden; chemische precipitatie; rioolslib; biomassa; fosfaat; kristallisatie; Klimaatverandering; anaerobic treatment; waste water; calcium; calcium carbonate; precipitation; anaerobic conditions; chemical precipitation; sewage sludge; biomass; phosphate; crystallization; Climatic Change

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APA (6^th Edition):

Langerak, van, E. P. A. (1998). Control of calcium carbonate precipitation in anaerobic reactors. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/42542 ; urn:nbn:nl:ui:32-42542 ; urn:nbn:nl:ui:32-42542 ; http://library.wur.nl/WebQuery/wurpubs/42542

Chicago Manual of Style (16^th Edition):

Langerak, van, E P A. “Control of calcium carbonate precipitation in anaerobic reactors.” 1998. Doctoral Dissertation, Agricultural University. Accessed April 12, 2021. http://library.wur.nl/WebQuery/wurpubs/42542 ; urn:nbn:nl:ui:32-42542 ; urn:nbn:nl:ui:32-42542 ; http://library.wur.nl/WebQuery/wurpubs/42542.

MLA Handbook (7^th Edition):

Langerak, van, E P A. “Control of calcium carbonate precipitation in anaerobic reactors.” 1998. Web. 12 Apr 2021.

Vancouver:

Langerak, van EPA. Control of calcium carbonate precipitation in anaerobic reactors. [Internet] [Doctoral dissertation]. Agricultural University; 1998. [cited 2021 Apr 12]. Available from: http://library.wur.nl/WebQuery/wurpubs/42542 ; urn:nbn:nl:ui:32-42542 ; urn:nbn:nl:ui:32-42542 ; http://library.wur.nl/WebQuery/wurpubs/42542.

Council of Science Editors:

Langerak, van EPA. Control of calcium carbonate precipitation in anaerobic reactors. [Doctoral Dissertation]. Agricultural University; 1998. Available from: http://library.wur.nl/WebQuery/wurpubs/42542 ; urn:nbn:nl:ui:32-42542 ; urn:nbn:nl:ui:32-42542 ; http://library.wur.nl/WebQuery/wurpubs/42542

McMaster University

21. Eggertson, E. Bruce. The Espanola Formation: A Proterozoic Carbonate North of Lake Huron, Ontario.

Degree: 1975, McMaster University

URL: http://hdl.handle.net/11375/17756

►

The Proterozoic Espanola Formation (Huronian Sequence) was studied at Geneva Lake, Ontario, 45 miles north-west of Sudbury. A major lithological change exists in the Espanola… (more)

Subjects/Keywords: Proterozoic Espanola Formation; Huronian Sequence; Geneva Lake; lithology; Espanola; cycle of deposition; glacial advance and retreat; calcium carbonate precipitation

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APA (6^th Edition):

Eggertson, E. B. (1975). The Espanola Formation: A Proterozoic Carbonate North of Lake Huron, Ontario. (Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/17756

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Eggertson, E Bruce. “The Espanola Formation: A Proterozoic Carbonate North of Lake Huron, Ontario.” 1975. Thesis, McMaster University. Accessed April 12, 2021. http://hdl.handle.net/11375/17756.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Eggertson, E Bruce. “The Espanola Formation: A Proterozoic Carbonate North of Lake Huron, Ontario.” 1975. Web. 12 Apr 2021.

Vancouver:

Eggertson EB. The Espanola Formation: A Proterozoic Carbonate North of Lake Huron, Ontario. [Internet] [Thesis]. McMaster University; 1975. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/11375/17756.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Eggertson EB. The Espanola Formation: A Proterozoic Carbonate North of Lake Huron, Ontario. [Thesis]. McMaster University; 1975. Available from: http://hdl.handle.net/11375/17756

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Long, Jacqueline. Whiting Events Off Southwest Florida: Remote Sensing and Field Observations.

Degree: 2016, University of South Florida

URL: https://scholarcommons.usf.edu/etd/6535

► “Whiting” is a term used to describe a sharply defined patch of water that contains high levels of suspended, fine-grained calcium carbonate (CaCO3). These features… (more)

▼ “Whiting” is a term used to describe a sharply defined patch of water that contains high levels of suspended, fine-grained calcium carbonate (CaCO3). These features are named for their bright (at times white) appearance when compared to surrounding waters, and have been found to occur globally, persisting for multiple consecutive days. Although whitings have been widely studied using chemical, biological, geological, and physical techniques, there has been little effort to document their spatio-temporal distributions in a systematic way, not to mention the lack of consensus on what generates whitings and allows them to persist for days to weeks at a time. In particular, although fishermen and aircraft pilots have reported whiting-like features off southwest Florida (e.g., a sighting off the Ten Thousand Islands was reported on October 29, 2013), there has been no targeted study on these features in this area. Therefore, the objective of this study is two fold: 1) to document the spatial-temporal distributions of whitings in southwest Florida (SWFL) coastal waters from 2003 through 2015 using satellite imagery to study how their occurrence is related to several environmental variables and 2) to conduct field and laboratory measurements to determine the particle composition and water characteristics in and outside the whiting features. To achieve objective one, a multi-year time series from 2003 through 2015 was developed over SWFL using Moderate Resolution Imaging Spectroradiometer (MODIS) observations. Customized processing was used in order to removed clouds and other artifacts and to delineate the surface whiting features. From this, statistics and distribution maps of whiting occurrence were generated. Annual mean whiting coverage peaked in 2011 (11 km2), when whiting reached a maximum daily visible coverage of 92 km2 on February 23. For the entire time series, the highest daily coverage observed was 126 km2 on December 6, 2008. Over all, whitings had higher spatial coverage during the spring and autumn, with 88% of all whiting coverage occurring within 40 km of the coastline. Images of average seasonal spatial distributions showed that over 90% of whitings located between 40 and 70 km of shore occurred specifically during the winter and autumn. A multivariate linear regression was performed, which found little to no correlation between annual whiting coverage and environmental factors such as sea surface temperature (SST), wind, and river discharge. This analysis was also applied to spatial distributions of whiting events within and outside of 20 km and 40 km from shore. The only statistically significant result was that of SST, as well as SST with river discharge and whiting events distributed more than 20 km from shore. In order to accomplish objective two, several field campaigns were conducted to collect in-situ data and water samples of pre-, post-, and occurring whiting event conditions to provide information on composition, driving forces, and variables that cannot be derived via satellites. Samples were…

Subjects/Keywords: whiting; calcium carbonate; precipitation; southwest Florida; Aquaculture and Fisheries; Biogeochemistry; Environmental Sciences

…observations of bacterial precipitation of calcium carbonate by Drew (1911, 5 1913), who… …calcium carbonate precipitation has been reproduced in the lab by the addition of unicellular… …60 Figure 3.14. Fully developed calcium carbonate crystal attached to a Thalassiosira sp… …that contains high levels of suspended, fine-grained calcium carbonate (CaCO3)… …crystals of calcium carbonate were present, attached to cells of Thalassiosira sp., localized to…

11 more images…

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APA (6^th Edition):

Long, J. (2016). Whiting Events Off Southwest Florida: Remote Sensing and Field Observations. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/6535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Long, Jacqueline. “Whiting Events Off Southwest Florida: Remote Sensing and Field Observations.” 2016. Thesis, University of South Florida. Accessed April 12, 2021. https://scholarcommons.usf.edu/etd/6535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Long, Jacqueline. “Whiting Events Off Southwest Florida: Remote Sensing and Field Observations.” 2016. Web. 12 Apr 2021.

Vancouver:

Long J. Whiting Events Off Southwest Florida: Remote Sensing and Field Observations. [Internet] [Thesis]. University of South Florida; 2016. [cited 2021 Apr 12]. Available from: https://scholarcommons.usf.edu/etd/6535.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Long J. Whiting Events Off Southwest Florida: Remote Sensing and Field Observations. [Thesis]. University of South Florida; 2016. Available from: https://scholarcommons.usf.edu/etd/6535

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

23. Λιόλιου, Μαρία. Μελέτη της συσσωμάτωσης εδαφών μέσω in situ καταβύθισης ανόργανων αλάτων ασβεστίου.

Degree: 2006, University of Patras; Πανεπιστήμιο Πατρών

URL: http://hdl.handle.net/10442/hedi/14165

Subjects/Keywords: Συσσωμάτωση εδαφών; Καταβύθιση αλάτων ασβεστίου; Κρυστάλλωση; Ουρεάση; Φωσφατάση; Ανθρακικό ασβέστιο; Πολυηλεκτρολύτες; Sand consolidation; Minerals precipitation; Crystallization; Urease; Phosphatase; Calcium carbonate; Polyelectrolytes

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APA (6^th Edition):

Λιόλιου, . �. (2006). Μελέτη της συσσωμάτωσης εδαφών μέσω in situ καταβύθισης ανόργανων αλάτων ασβεστίου. (Thesis). University of Patras; Πανεπιστήμιο Πατρών. Retrieved from http://hdl.handle.net/10442/hedi/14165

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Λιόλιου, Μαρία. “Μελέτη της συσσωμάτωσης εδαφών μέσω in situ καταβύθισης ανόργανων αλάτων ασβεστίου.” 2006. Thesis, University of Patras; Πανεπιστήμιο Πατρών. Accessed April 12, 2021. http://hdl.handle.net/10442/hedi/14165.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Λιόλιου, Μαρία. “Μελέτη της συσσωμάτωσης εδαφών μέσω in situ καταβύθισης ανόργανων αλάτων ασβεστίου.” 2006. Web. 12 Apr 2021.

Vancouver:

Λιόλιου �. Μελέτη της συσσωμάτωσης εδαφών μέσω in situ καταβύθισης ανόργανων αλάτων ασβεστίου. [Internet] [Thesis]. University of Patras; Πανεπιστήμιο Πατρών; 2006. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10442/hedi/14165.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Λιόλιου �. Μελέτη της συσσωμάτωσης εδαφών μέσω in situ καταβύθισης ανόργανων αλάτων ασβεστίου. [Thesis]. University of Patras; Πανεπιστήμιο Πατρών; 2006. Available from: http://hdl.handle.net/10442/hedi/14165

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

24. Flávia Marini Ronquim. Remoção de bário de efluente aquoso industrial por precipitação mediante dessupersaturação, adição de sulfato em excesso e abrandamento: estudo dos mecanismos dos aspectos tecnológicos e da ecoeficiência dos processos.

Degree: 2019, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17072019-095500/

► Em um cenário global de indisponibilidade hídrica, até regiões sem histórico de escassez de recursos hídricos vêm sendo impactadas pela ausência de chuvas e circunstâncias… (more)

▼ Em um cenário global de indisponibilidade hídrica, até regiões sem histórico de escassez de recursos hídricos vêm sendo impactadas pela ausência de chuvas e circunstâncias de adversidade climática. Com perspectivas cada vez menos favoráveis quanto ao abastecimento hídrico, têm-se difundido progressivamente, no Brasil e no mundo, alternativas de tratamento de efluentes aquosos industriais visando seu reúso na própria indústria, diminuindo a necessidade de captação de água em corpos hídricos. Os processos de separação com membrana (PSM\'s) têm tido destaque, sobretudo para reúso em caldeiras e torres de resfriamento. Em um PSM, no entanto, os íons removidos da corrente de alimentação durante o processo de dessalinização concentram-se no compartimento de rejeito das membranas (concentrado). Consequentemente, os sais de baixa solubilidade comumente ultrapassam sua saturação e excedem seus limites metaestáveis, passando a oferecer risco de deposição sobre as membranas. As deposições salinas, chamadas incrustações (ou scaling) prejudicam o processo de dessalinização: reduzem a taxa de recuperação de água, aumentam o consumo energético e danificam membranas e tubulações. Uma vez que o sulfato de bário (BaSO4) é um dos sais com maior potencial incrustante em efluentes industriais, e cujas incrustações apresentam maiores resistências às práticas convencionais de limpeza, estudou-se métodos preventivos de incrustação de BaSO4 por remoção de íons bário de fase líquida a montante de um PSM. A depleção de bário de solução foi analisada mediante: (i) precipitação de BaSO4 por meio de dessupersaturação (com adição de sementes) e efeito do íon comum (excesso de sulfato) e (ii) precipitação de CaCO3 por abrandamento com incorporação do íon Ba2+ no precipitado. Desenvolveu-se, inicialmente, um estudo conceitual da precipitação de BaSO4 por modelagem termodinâmica, aplicada ao tratamento de um efluente padrão de refinaria de petróleo supersaturado em BaSO4. As simulações termodinâmicas apontam que o pre-tratamento de efluentes por dessupersaturação, com opção de adicionar sulfato (via adição externa ou reciclo) são promissores para aumentar o rendimento de PSM\'s. Em estudos experimentais com efluente sintético de refinaria de petróleo, foi obtida a cinética de precipitação do BaSO4 para o ajuste de um modelo de precipitação de BaSO4. Observou-se que o tempo de indução do BaSO4 foi reduzido à medida que se aumentou o excesso de sulfato (em relação ao bário presente) ou à medida que se adicionou sementes de BaSO4. Após um período curto de precipitação (alguns minutos), a solução permanecia supersaturada por longos períodos (horas), com razões de supersaturação residuais dentro da faixa de 1,1 a 3,0. Esses valores foram associados com uma dependência de quarta ordem da taxa de crescimento do cristal com a taxa de supersaturação. Verificou-se que a carga de sementes de BaSO4 é diretamente proporcional à depleção de supersaturação, que sementes heterogêneas (CaCO3, CaSO4.2H2O) são ineficazes para a precipitação do BaSO4 e que os íons… Advisors/Committee Members: Marcelo Martins Seckler, André Bernardo, Osvaldo Chiavone Filho, Luiz Alexandre Kulay, Sônia Denise Ferreira Rocha.

Subjects/Keywords: Análise de ecoeficiência; Cristalização industrial; Efluente industrial aquoso; Incrustação; Precipitação; Precipitação de sulfato de bário e de carbonato de cálcio; Remoção de bário; Sais inorgânicos; Tratamento de águas residuárias; Aqueous industrial effluent; Barium removal; Eco-efficiency analysis; Incrustation; Inorganic salts; Precipitation of barium sulfate and calcium carbonate

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ronquim, F. M. (2019). Remoção de bário de efluente aquoso industrial por precipitação mediante dessupersaturação, adição de sulfato em excesso e abrandamento: estudo dos mecanismos dos aspectos tecnológicos e da ecoeficiência dos processos. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17072019-095500/

Chicago Manual of Style (16^th Edition):

Ronquim, Flávia Marini. “Remoção de bário de efluente aquoso industrial por precipitação mediante dessupersaturação, adição de sulfato em excesso e abrandamento: estudo dos mecanismos dos aspectos tecnológicos e da ecoeficiência dos processos.” 2019. Doctoral Dissertation, University of São Paulo. Accessed April 12, 2021. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17072019-095500/.

MLA Handbook (7^th Edition):

Ronquim, Flávia Marini. “Remoção de bário de efluente aquoso industrial por precipitação mediante dessupersaturação, adição de sulfato em excesso e abrandamento: estudo dos mecanismos dos aspectos tecnológicos e da ecoeficiência dos processos.” 2019. Web. 12 Apr 2021.

Vancouver:

Ronquim FM. Remoção de bário de efluente aquoso industrial por precipitação mediante dessupersaturação, adição de sulfato em excesso e abrandamento: estudo dos mecanismos dos aspectos tecnológicos e da ecoeficiência dos processos. [Internet] [Doctoral dissertation]. University of São Paulo; 2019. [cited 2021 Apr 12]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17072019-095500/.

Council of Science Editors:

Ronquim FM. Remoção de bário de efluente aquoso industrial por precipitação mediante dessupersaturação, adição de sulfato em excesso e abrandamento: estudo dos mecanismos dos aspectos tecnológicos e da ecoeficiência dos processos. [Doctoral Dissertation]. University of São Paulo; 2019. Available from: http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17072019-095500/

Georgia Tech

25. Michel-Sanchez, Enrique. Impact of Particle Morphology on the Rheology of PCC-Based Coatings.

Degree: MS, Chemical Engineering, 2005, Georgia Tech

URL: http://hdl.handle.net/1853/7114

► The impact of particle size, size distribution, and particle shape on the rheology of precipitated calcium carbonate (PCC) based coatings was studied. Evaluating the interactions… (more)

Subjects/Keywords: Albagloss; Precipitated calcium carbonate; Combination ratio; Viscosity; Paper coatings; Rheology; PCC; Pigments; Pigment combinations; Opacarb; Shape combinations; Rheology of coatings; Precipitation (Chemistry); Particles; Paper coatings; Calcium carbonate; Rheology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Michel-Sanchez, E. (2005). Impact of Particle Morphology on the Rheology of PCC-Based Coatings. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/7114

Chicago Manual of Style (16^th Edition):

Michel-Sanchez, Enrique. “Impact of Particle Morphology on the Rheology of PCC-Based Coatings.” 2005. Masters Thesis, Georgia Tech. Accessed April 12, 2021. http://hdl.handle.net/1853/7114.

MLA Handbook (7^th Edition):

Michel-Sanchez, Enrique. “Impact of Particle Morphology on the Rheology of PCC-Based Coatings.” 2005. Web. 12 Apr 2021.

Vancouver:

Michel-Sanchez E. Impact of Particle Morphology on the Rheology of PCC-Based Coatings. [Internet] [Masters thesis]. Georgia Tech; 2005. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1853/7114.

Council of Science Editors:

Michel-Sanchez E. Impact of Particle Morphology on the Rheology of PCC-Based Coatings. [Masters Thesis]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/7114

26. Stynoski, Peter B. Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates.

Degree: PhD, Civil Engineering, 2015, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/89041

► Researchers have recently demonstrated the capabilities of microbially-induced calcium carbonate precipitation to fill and seal cracks in cementitious materials. However, the mechanical strength of microbially-induced… (more)

▼ Researchers have recently demonstrated the capabilities of microbially-induced calcium carbonate precipitation to fill and seal cracks in cementitious materials. However, the mechanical strength of microbially-induced crack healing is seldom investigated, especially at the fundamental level. In an effort to aid future development of structural repairs using this technique, the research discussed herein examines the suitability of several test methods to quantify the mechanical bond between calcium carbonate bio-deposits and cementitious substrates. Tests are performed at laboratory- and nano-scale to study both realistic cracks and isolated interfaces created under ideal conditions. Resonant frequency and mechanical bending tests were performed on notched, damaged, and treated Portland cement mortar beams. Sporosarcina pasteurii in nutrient media was applied to cracked beams in two different environmental conditions. Several experimental control treatments lacking bacteria were applied to additional sets of beams. Furthermore, bio-deposits were grown on prepared surfaces of cement paste in order to analyze an isolated interface using nanoscratch tests. A low-viscosity epoxy repair system was studied alongside the bio-deposits at both scales to provide a benchmark for comparison. Due to the challenges encountered when analyzing nanoscratch test results for a porous, discretely crystalline coating, data analysis methods for nanoscratch experiments were first established using a simplified model system of calcium-silicate-hydrate corrosion products on soda-lime glass substrates. Over the course of a 28-day treatment period, mortar beams in nearly all treatment conditions recovered to 95-105% of their pre-cracked resonant frequency, though the rate of recovery varied. Beams healed autogenously through hydration of remaining cement, without addition of external water, recovered to only about 85% of their original resonant frequency. In mechanical testing, only the set of beams healed by epoxy was capable of recovering significant load-carrying capacity. Other treated beams exhibited marginal improvements in fracture toughness recovery, but again lagged far behind the epoxy-based repair used for comparison in this study. On the other hand, the stiffness recovery under nearly all treatment conditions was competitive with the epoxy investigated here. These results indicate that the bacteria-based treatment could produce a repair that is weak in tension on the laboratory scale, but that bridges cracks well enough to increase overall stiffness. Initial nanoscratch experiments studying the model system of corrosion products on glass were indeed capable of quantifying an empirically observed distinction in bond strengths. When isolating the interfacial mechanical bond on this smaller scale, we find that a bio-deposit coating on cement paste fails at similar critical loads as an epoxy coating. Therefore, while the beam tests on the laboratory scale indicate a weak bond, it is possible for nano-scale tests which better… Advisors/Committee Members: Mondal, Paramita (advisor), Mondal, Paramita (Committee Chair), Lange, David (committee member), Popovics, John (committee member), Marsh, Charles (committee member).

Subjects/Keywords: microbially-induced calcium carbonate precipitation (MICP); Two-Parameter Fracture Model (TPFM); nanoscratch; healing efficiency; resonant frequency; cement mortar repair

…Microbially-induced calcium carbonate precipitation (MICP) offers a potentially carbon… …LITERATURE REVIEW 2.1 Microbially induced calcium carbonate precipitation Researchers around the… …world have recently publicized microbially-induced calcium carbonate precipitation (MICP… …locally high pH will encourage calcium carbonate precipitation. The chemical equations… …carbonate precipitation PCU = polycarbonate urethane PTFE = polytetrafluoroethylene RILEM…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Stynoski, P. B. (2015). Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/89041

Chicago Manual of Style (16^th Edition):

Stynoski, Peter B. “Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 12, 2021. http://hdl.handle.net/2142/89041.

MLA Handbook (7^th Edition):

Stynoski, Peter B. “Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates.” 2015. Web. 12 Apr 2021.

Vancouver:

Stynoski PB. Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2142/89041.

Council of Science Editors:

Stynoski PB. Quantification of bond strength between cementitious materials and microbially-induced calcium carbonate precipitates. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/89041

27. -0464-1126. Modeling of geochemical reactions with fluid flow simulation for scale precipitation and alkaline/surfactant/polymer flooding processes.

Degree: MSin Engineering, Petroleum Engineering, 2017, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/2012

► Precipitation of minerals is a very prevalent and crucial challenge that occurs once there are two different water phases (types), which consist of different concentration… (more)

▼ Precipitation of minerals is a very prevalent and crucial challenge that occurs once there are two different water phases (types), which consist of different concentration of elements, in a reservoir with changing environmental parameters such as temperature and pressure. Most operated oil and gas fields have been facing the problem of deposition of scales around and inside the wellbore since they have not only water injection but also water production. There is a lack of investigation about scale problem because of the uncomprehensive reservoir simulator considering scale precipitation during water injection and production. In this study, an in-house three-dimensional multi-phase reservoir simulator (UTCHEM) is used to model amount of scale precipitation for several cases. In this work, we neglect the effect of hydrocarbon (eg. CH₄, CO₂, and H₂S) dissolutions during scale deposition. Kinetic reactions are coupled with the fluid flow simulator to consider efficiency of water flooding process affected by scale precipitation around the injection and production wells. Several scale deposition and remediation mechanisms are investigated to tune reaction parameters against experimental data at reservoir condition to study transportation, deposition, and remediation of scales near wells. Simulation results show that ignoring scale precipitation in modeling leads to poor prediction for productivity and injectivity of water flood or another enhanced oil recovery (EOR) processes. Simulation study considering scale precipitation totally changes the performance of water flood and production scenarios. Results reveal that the composition of injected water, pH, and temperature of injected water are important factors that control the scale deposition. Meanwhile, these factors are essential to guide the scale remediation process near the wells. We also used the UTCHEM simulator to investigate the effect of temperature on geochemistry reactions during alkaline surfactant polymer (ASP) injection. Such process efficiency that rely on geochemistry reactions are depend on temperature. We also investigate two different relative permeability models in UTCHEM. A case of alkaline/surfactant polymer core flood is established to test this purpose as well as soap generation because of reaction between alkaline and acid components Advisors/Committee Members: Sepehrnoori, Kamy, 1951- (advisor).

Subjects/Keywords: Scale; Precipitation; Calcium carbonate; Barium sulfate; Temperature dependency; Relative permeability; UTCHEM; Geochemical reactions; Soap generation; pH; Surfactant adsorption

…driving force for deposition of calcium carbonate precipitation is supersaturated elements of… …35 4.3 Barium Sulfate and Calcium Carbonate Scale ................................... 37… …4.4 Barium Sulfate, Calcium Carbonate, and Ferrous Sulfide Scale ....... 38 Chapter 5… …pressure except for calcium carbonate, which shows the inverse trend of increasing water… …precipitations are shown by Moghadasi et al. (2003) in Table 2.2. Calcium carbonate and…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

-0464-1126. (2017). Modeling of geochemical reactions with fluid flow simulation for scale precipitation and alkaline/surfactant/polymer flooding processes. (Masters Thesis). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/2012

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-0464-1126. “Modeling of geochemical reactions with fluid flow simulation for scale precipitation and alkaline/surfactant/polymer flooding processes.” 2017. Masters Thesis, University of Texas – Austin. Accessed April 12, 2021. http://dx.doi.org/10.26153/tsw/2012.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-0464-1126. “Modeling of geochemical reactions with fluid flow simulation for scale precipitation and alkaline/surfactant/polymer flooding processes.” 2017. Web. 12 Apr 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-0464-1126. Modeling of geochemical reactions with fluid flow simulation for scale precipitation and alkaline/surfactant/polymer flooding processes. [Internet] [Masters thesis]. University of Texas – Austin; 2017. [cited 2021 Apr 12]. Available from: http://dx.doi.org/10.26153/tsw/2012.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-0464-1126. Modeling of geochemical reactions with fluid flow simulation for scale precipitation and alkaline/surfactant/polymer flooding processes. [Masters Thesis]. University of Texas – Austin; 2017. Available from: http://dx.doi.org/10.26153/tsw/2012

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

28. ΞΥΛΑ, ΑΓΛΑΙΑ. ΚΑΤΑΒΥΘΙΣΗ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ.

Degree: 1989, Πανεπιστήμιο Πατρών; University of Patras

URL: http://hdl.handle.net/10442/hedi/2114

►

THE PRECIPITATION OF CALCIUM CARBONATE FROM AQEOUS SOLUTIONS HAS BEEN STUDIED AT SUPERSATURATIONS SUFFICIENT FOR SPONTANEOUS PRECIPITATION, BUT LOW ENOUGH TO ENABLE HIGHLY REPRODUCIBLE EXPERIMENTS… (more)

▼

THE PRECIPITATION OF CALCIUM CARBONATE FROM AQEOUS SOLUTIONS HAS BEEN STUDIED AT SUPERSATURATIONS SUFFICIENT FOR SPONTANEOUS PRECIPITATION, BUT LOW ENOUGH TO ENABLE HIGHLY REPRODUCIBLE EXPERIMENTS TO BE CARRIED OUT WITH RESPECT TO INDUCTION PERIODS AND RATES OF PRECIPITATION. THE STABILITY OF CALCIUM CARBONATE SUPERSATURATED SOLUTIONS WAS STUDIED FOR TEMPERATURES BETWEEN 25 AND 80 C AND PH 800-900. IN ALL CASES THE INDUCTION PERIODS AND INITIAL RATES OF PRECIPITATION ARE BOTH STRONGLY DEPENDENT ON SUPERSATURATION. THE INVESTIGATION OF THE PRECIPITATION PROCESS TOOK PLACE BY TWO DIFFERENT EXPERIMENTAL TECHNIQUES: A) PH-STAT METHOD AND B) A PLETHOSTATIC EXPERIMENTAL APPROACH. BY MAINTAINING THE INITIAL SOLUTION CONDITIONS WHILE FOLLOWING THE PRECIPITATION PROCESS, WE WERE ABLE TO CONFIRM THAT THE SOLID PHASE FORMING WAS VATERITE, RAPIDLY CONVERTING TO CALCITE. KINETIC ANALYSIS OF THE INITIAL RATES SHOWED MARKED DEPENDENCE OF THE RATE OFVATERITE FORMATION ON THE SOLUTION SUPERSATURATION.

Η ΚΑΤΑΒΥΘΙΣΗ ΤΟΥ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ, ΕΧΕΙ ΜΕΛΕΤΗΘΕΙ ΣΕ ΥΠΕΡΚΟΡΕΣΜΟΥΣ ΤΕΤΟΙΟΥΣ ΩΣΤΕ ΝΑ ΣΥΜΒΑΙΝΕΙ ΑΥΘΟΡΜΗΤΗ ΚΑΤΑΒΥΘΙΣΗ, ΤΟΣΟ ΣΕ ΚΑΘΑΡΑ ΥΠΕΡΚΟΡΑ ΔΙΑΛΥΜΑΤΑ ΟΣΟ ΚΑΙ ΠΑΡΟΥΣΙΑ ΥΔΑΤΟΔΙΑΛΥΤΩΝ ΕΝΩΣΕΩΝ. ΑΠΟ ΤΗΝ ΜΕΛΕΤΗ ΤΗΣ ΚΙΝΗΤΙΚΗΣ ΤΗΣ ΚΡΥΣΤΑΛΛΩΣΗΣ ΣΤΙΣ ΔΥΟ ΑΥΤΕΣ ΠΕΡΙΠΤΩΣΕΙΣ ΓΙΝΕΤΑΙ ΚΑΤΑΝΟΗΤΟΣ Ο ΜΗΧΑΝΙΣΜΟΣ ΣΧΗΜΑΤΙΣΜΟΥ ΑΠΟΦΡΑΚΤΙΚΩΝ ΙΖΗΜΑΤΩΝ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ . ΤΟΥΤΟ ΑΠΟΤΕΛΕΙ ΒΑΣΙΚΗ ΠΡΟΥΠΟΘΕΣΗ ΓΙΑ ΤΟΝ ΕΛΕΓΧΟ ΣΧΗΜΑΤΙΣΜΟΥ ΚΑΘΑΛΑΤΩΣΕΩΝ CACO3, ΚΑΙ ΤΗΝ ΑΝΑΣΤΟΛΗ ΤΟΥΣ ΟΠΟΥ ΑΥΤΕΣ ΚΡΙΝΟΝΤΑΙ ΑΝΕΠΙΘΥΜΗΤΕΣ. Η ΔΙΕΡΕΥΝΗΣΗ ΤΗΣ ΔΙΕΡΓΑΣΙΑΣ ΤΗΣ ΚΡΥΣΤΑΛΛΩΣΗΣ, ΕΓΙΝΕ ΜΕ ΔΥΟ ΜΕΘΟΔΟΥΣ: Α) ΤΗ ΜΕΘΟΔΟ ΔΙΑΤΗΡΗΣΗΣ ΣΤΑΘΕΡΟΥ ΡΗ ΚΑΙ Β) ΤΗΝ ΠΛΗΘΟΣΤΑΤΙΤΚΗ ΤΕΧΝΙΚΗ. ΣΤΗΝ ΜΕΛΕΤΗ ΤΗΣ ΚΙΝΗΤΙΚΗΣ ΤΗΣ ΚΑΤΑΒΥΘΙΣΗΣ ΤΟΥ CACO3, ΥΠΟΛΟΓΙΣΘΗΚΑΝ ΟΙ ΑΡΧΙΚΕΣ ΤΑΧΥΤΗΤΕΣ ΣΧΗΜΑΤΙΣΜΟΥ ΤΟΥ ΒΑΤΕΡΙΤΗ ΜΑΣ ΚΑΙ ΑΥΤΗ ΗΤΑΝ Η ΑΡΧΙΚΑ ΣΧΗΜΑΤΙΖΟΜΕΝΗ ΦΑΣΗ. ΕΙΝΑΙ Η ΠΡΩΤΗ ΦΟΡΑ ΠΟΥ ΣΗΜΕΙΩΝΕΤΑΙ Η ΠΑΡΟΥΣΙΑ ΒΑΤΕΡΙΤΗ ΣΤΙΣ ΠΕΙΡΑΜΑΤΙΚΕΣ ΣΥΝΘΗΚΕΣ ΠΟΥ ΕΓΙΝΑΝ ΤΑ ΠΕΙΡΑΜΑΤΑ ΑΥΤΗΣ ΤΗΣ ΔΙΑΤΡΙΒΗΣ.

Subjects/Keywords: Aqueous solutions; Calcium carbonate; INDUCTION PERIOD; ORGANOPHOSPHOROUS COMPOUNDS; PH-STAT METHOD; PLETHOSTATIC METHOD; Prevention; Scales; SPONTANEOUS PRECIPITATION; Αναστολή; Ανθρακικό ασβέστιο; ΑΠΟΦΡΑΚΤΙΚΑ ΙΖΗΜΑΤΑ; ΑΥΘΟΡΜΗΤΗ ΚΑΤΑΒΥΘΙΣΗ; ΟΡΓΑΝΟΦΩΣΦΟΡΙΚΕΣ ΕΝΩΣΕΙΣ; ΠΛΗΘΟΣΤΑΤΙΚΗ ΜΕΘΟΔΟΣ; Υδατικά συστήματα; Χρόνος επαγωγής

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

ΞΥΛΑ, �. (1989). ΚΑΤΑΒΥΘΙΣΗ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ. (Thesis). Πανεπιστήμιο Πατρών; University of Patras. Retrieved from http://hdl.handle.net/10442/hedi/2114

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

ΞΥΛΑ, ΑΓΛΑΙΑ. “ΚΑΤΑΒΥΘΙΣΗ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ.” 1989. Thesis, Πανεπιστήμιο Πατρών; University of Patras. Accessed April 12, 2021. http://hdl.handle.net/10442/hedi/2114.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

ΞΥΛΑ, ΑΓΛΑΙΑ. “ΚΑΤΑΒΥΘΙΣΗ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ.” 1989. Web. 12 Apr 2021.

Vancouver:

ΞΥΛΑ �. ΚΑΤΑΒΥΘΙΣΗ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ. [Internet] [Thesis]. Πανεπιστήμιο Πατρών; University of Patras; 1989. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10442/hedi/2114.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

ΞΥΛΑ �. ΚΑΤΑΒΥΘΙΣΗ ΑΝΘΡΑΚΙΚΟΥ ΑΣΒΕΣΤΙΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ. [Thesis]. Πανεπιστήμιο Πατρών; University of Patras; 1989. Available from: http://hdl.handle.net/10442/hedi/2114

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations