subject:(aerosol mass spectrometer)

1. Tsimkouski, I. New methods to study composition and processes of atmospheric organics in the gas and the condensed phase.

Degree: 2015, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/302982

► Volatile organic compounds (VOCs) and organic aerosols (OA) play an important role in the Earth’s atmosphere due to their influence on human health and climate.… (more)

▼ Volatile organic compounds (VOCs) and organic aerosols (OA) play an important role in the Earth’s atmosphere due to their influence on human health and climate. To be able to control amounts of VOCs and OA in the atmosphere, one has to understand the main sources of them and the effect of external factors on these sources. While many studies on the main VOC source (i.e. emission from plants) have been performed, there has been only a limited number of studies on how external factors such as environmental pollution effect plant emissions. Historically, OA is measured as bulk organic carbon. Measuring the chemical composition of OA is more challenging but nevertheless essential to fully understand secondary sources and climate effects of aerosols. The goal of this work was the development and validation of new methods that aim at providing new tools for innovative research in the abovementioned field. The first part of this work describes a newly developed setup in order to study the effect of pollution on VOCs emitted by plants. Various pollutants can be applied in the setup. The setup allows for in situ detailed measurements of changes in plant emissions and allows distinguishing isomeric compounds emitted by plants in normal conditions as well as under stress. The setup has been tested based on experiments with birch seedlings: their emissions were measured, oxidized and the oxidation products were measured as well. A reasonable agreement with literature data was observed. The second part of this work describes a new method called offline thermal-desorption proton-transfer-reaction mass-spectrometry (TD-PTR-MS), which allows for detailed and relatively cheap measurements of OA composition based on filter samples which can be collected in a broad range of locations. The method has been tested based on the inter-comparison with the proven in situ technique (in situ TD-PTR-MS) (e.g., Holzinger et al., 2010) and in general a good agreement between the two techniques was confirmed. However, it was found that for the filters sampled for one day, positive sampling artifacts caused by the adsorption of semivolatile organic species on the filters were high, which is in accordance with previous findings described in the literature. For the filters sampled for two and three days slight negative artifacts were observed likely caused by not complete desorption of aerosols off the filters at temperatures up to 3500C and potential chemical degradation of aerosols on the filters. The third part of this work shows the ability of the in situ TD-PTR-MS technique to reasonably measure total OA mass concentrations as well as speciated organics with a time resolution of 0.5 hour. The former is shown based on the comparison with aerosol mass spectrometer (AMS) measurements. The latter is done based on the inter-comparison with two-dimensional gas chromatography with a time-of-flight mass spectrometer (GC×GC/TOF-MS) technique. We found that species with mass concentrations above 2 ng/m3, as measured by GC×GC/TOF-MS, were reasonably… Advisors/Committee Members: Roeckmann, Thomas, Holzinger, Rupert.

Subjects/Keywords: volatile organic compounds; organic aerosol; plant emissions; mass spectrometer

11 more images…

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Tsimkouski, I. (2015). New methods to study composition and processes of atmospheric organics in the gas and the condensed phase. (Doctoral Dissertation). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/302982

Chicago Manual of Style (16^th Edition):

Tsimkouski, I. “New methods to study composition and processes of atmospheric organics in the gas and the condensed phase.” 2015. Doctoral Dissertation, Universiteit Utrecht. Accessed March 02, 2021. http://dspace.library.uu.nl:8080/handle/1874/302982.

MLA Handbook (7^th Edition):

Tsimkouski, I. “New methods to study composition and processes of atmospheric organics in the gas and the condensed phase.” 2015. Web. 02 Mar 2021.

Vancouver:

Tsimkouski I. New methods to study composition and processes of atmospheric organics in the gas and the condensed phase. [Internet] [Doctoral dissertation]. Universiteit Utrecht; 2015. [cited 2021 Mar 02]. Available from: http://dspace.library.uu.nl:8080/handle/1874/302982.

Council of Science Editors:

Tsimkouski I. New methods to study composition and processes of atmospheric organics in the gas and the condensed phase. [Doctoral Dissertation]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/302982

University of California – Riverside

2. Vu, Kennedy- Kiet Tuan. Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-Flight Aerosol Mass Spectrometer.

Degree: Environmental Toxicology, 2016, University of California – Riverside

URL: http://www.escholarship.org/uc/item/0wk5t87h

► Atmospheric aerosols affect climate, ecosystems, visibility, and human health. However, aerosol sources, atmospheric processing and climate effects still have significant uncertainties. Aerosols have a variety… (more)

▼ Atmospheric aerosols affect climate, ecosystems, visibility, and human health. However, aerosol sources, atmospheric processing and climate effects still have significant uncertainties. Aerosols have a variety of characteristics, in terms of size, morphology, optical properties, and chemical composition owing to their complex nature. The presented work in this thesis summarizes measurements carried out in Mira Loma, CA (2013) and the Colorado Front Range (2014) with the aim to better characterize the local air quality by quantifying the aerosol composition and extinction properties. Here, this thesis will address:(1) Summertime ambient aerosol composition and extinction in Mira Loma, California.In Southern California, pollution is primarily caused by emissions from transportation sources, and are also influenced by topography and meteorology in the area. Specifically, in the Inland Empire, warm, and dry climate promotes the formation of ozone during summer months and eastern portions of the region trap pollution due to mountain induced topography. Aimed with the goal to characterize and understand the summertime composition of ambient aerosols, and the dominant aerosol composition driving aerosol optical extinction (ext), we conducted ground-based measurements from August 17 – September 22, 2013 at the Mira Loma South Coast Air Quality Management District site. OA (54%) was found to be the most dominate aerosol non-refractory species, followed by nitrate (20%) and sulfate (14%). A strong correlation between optical extinction and aerosol nitrate fraction was also observed, indicating that visibility degradation in the eastern Los Angeles Basin is driven by secondary formation of inorganic ammonium nitrate rather than organic aerosol.(2) Impacts of the Denver Cyclone on Air Quality in the Colorado Front Range during the FRAPPÉ 2014 campaign.We present airborne measurements made aboard the NSF C-130 aircraft during the 2014 FRAPPÉ campaign. During the study, a synoptic mesoscale development termed the “Denver Cyclone” was prominent on July 27-28, 2014. The Denver Cyclone has a unique flow structure due to mountain induced circulation, making aircraft measurements critical and insightful to pollution transport patterns during this episode. Our results showed an increase in aerosol mass concentration of OA, NO3-, and SO42-, during the cyclone by as much as 40-80%. Additionally, different aerosol species were found to impact optical extinction (βext) on cyclone vs. non-cyclone periods. Specifically, during the non-cyclone period, OA was responsible for driving βext in the Denver Metropolitan area while in the presence of the cyclone, NO3- influenced βext the most. The overarching objectives of both of these field campaigns is to gain a better understanding of the chemical and physical characteristics of atmospheric aerosols formed from different sources that are responsible for the reduction in the overall air quality. Advanced understanding of aerosol characteristics and the relationships with precursor sources is…

Subjects/Keywords: Atmospheric sciences; Atmospheric chemistry; Environmental science; Aerosol chemical composition; Aerosol Mass Spectrometer; Aerosol Optical Extinction; Aerosols; Ambient Measurements; Secondary Organic Aerosols

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Vu, K. K. T. (2016). Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-Flight Aerosol Mass Spectrometer. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/0wk5t87h

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):

Vu, Kennedy- Kiet Tuan. “Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-Flight Aerosol Mass Spectrometer.” 2016. Thesis, University of California – Riverside. Accessed March 02, 2021. http://www.escholarship.org/uc/item/0wk5t87h.

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

MLA Handbook (7^th Edition):

Vu, Kennedy- Kiet Tuan. “Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-Flight Aerosol Mass Spectrometer.” 2016. Web. 02 Mar 2021.

Vancouver:

Vu KKT. Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-Flight Aerosol Mass Spectrometer. [Internet] [Thesis]. University of California – Riverside; 2016. [cited 2021 Mar 02]. Available from: http://www.escholarship.org/uc/item/0wk5t87h.

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

Council of Science Editors:

Vu KKT. Chemical Composition of Atmospheric Aerosols in Air Quality Field Measurements Using a Compact Time-of-Flight Aerosol Mass Spectrometer. [Thesis]. University of California – Riverside; 2016. Available from: http://www.escholarship.org/uc/item/0wk5t87h

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

University of Manchester

3. Jolleys, Matthew. A global analysis of biomass burning organic aerosol.

Degree: PhD, 2013, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/a-global-analysis-of-biomass-burning-organic-aerosol(6dbebe3d-fb4a-4d68-b6c7-83c32ae3fa52).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607109

► Organic aerosols represent one of the main sources of uncertainty affecting attempts to quantify anthropogenic climate change. The diverse physical and chemical properties of organic… (more)

▼ Organic aerosols represent one of the main sources of uncertainty affecting attempts to quantify anthropogenic climate change. The diverse physical and chemical properties of organic aerosols and the varied pathways involved in their formation and aging form the basis of this uncertainty, preventing extensive and accurate representation within regional and global scale models. This inability to constrain the radiative forcings produced by organic aerosols within the atmosphere consequently acts as a limitation to the wider objective of providing reliable projections of future climate. Biomass burning constitutes one of the main anthropogenic contributions to the global atmospheric organic aerosol (OA) burden, particularly in tropical regions where the potential for perturbations to the climate system is also enhanced due to higher average levels of solar irradiance. Emissions from biomass burning have been the subject of an intense research focus in recent years, involving a combination of field campaigns and laboratory studies. These experiments have aimed to improve the limited understanding of the processes involved in the evolution of biomass burning organic aerosol (BBOA) and contribute towards the development of more robust parameterisations for climate and chemical transport models. The main objective of this thesis was to use datasets acquired from several different global regions to perform a broad analysis of the BBOA fraction, with the extensive temporal and spatial scales provided by such measurements enabling investigation of a number of key uncertainties, including regional variability in emissions and the role of secondary organic aerosol (SOA) formation in aging smoke plumes. Measurements of BBOA mass concentration obtained using Aerodyne Research Inc. Aerosol Mass Spectrometers (AMS) were used to calculate characteristic ΔOA/ΔCO ratios for different environments, accounting for the effects of dilution and contrasting fire sizes to give a proportional representation of OA production. High levels of variability in average ΔOA/ΔCO were observed both between and within different regions. The scale of this variability consistently exceeded any differences between plumes of different ages, while a widespread absence of any sustained increase in ΔOA/ΔCO with aging indicates that SOA formation does not provide a net increase in OA mass. Despite this lack of OA enhancement, increasing proportions of oxygenated OA components in aged plumes highlight the chemical transformations occurring during the evolution of BBOA, and the additional influence of OA loss through evaporation or deposition. Potential drivers of variability in ΔOA/ΔCO at source, such as changes in fuel types and combustion conditions, were investigated for controlled fires carried out within a combustion chamber. These laboratory experiments revealed a number of complex relationships between BB emissions and source conditions. Although ΔOA/ΔCO was shown to be influenced by both fuel properties and transitions between flaming and smouldering…

Subjects/Keywords: 621.3815; biomass burning; organic aerosol; emission ratios; aerosol mass spectrometer; aircraft measurements; field campaigns; combustion chamber; aerosol aging

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jolleys, M. (2013). A global analysis of biomass burning organic aerosol. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/a-global-analysis-of-biomass-burning-organic-aerosol(6dbebe3d-fb4a-4d68-b6c7-83c32ae3fa52).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607109

Chicago Manual of Style (16^th Edition):

Jolleys, Matthew. “A global analysis of biomass burning organic aerosol.” 2013. Doctoral Dissertation, University of Manchester. Accessed March 02, 2021. https://www.research.manchester.ac.uk/portal/en/theses/a-global-analysis-of-biomass-burning-organic-aerosol(6dbebe3d-fb4a-4d68-b6c7-83c32ae3fa52).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607109.

MLA Handbook (7^th Edition):

Jolleys, Matthew. “A global analysis of biomass burning organic aerosol.” 2013. Web. 02 Mar 2021.

Vancouver:

Jolleys M. A global analysis of biomass burning organic aerosol. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2021 Mar 02]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/a-global-analysis-of-biomass-burning-organic-aerosol(6dbebe3d-fb4a-4d68-b6c7-83c32ae3fa52).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607109.

Council of Science Editors:

Jolleys M. A global analysis of biomass burning organic aerosol. [Doctoral Dissertation]. University of Manchester; 2013. Available from: https://www.research.manchester.ac.uk/portal/en/theses/a-global-analysis-of-biomass-burning-organic-aerosol(6dbebe3d-fb4a-4d68-b6c7-83c32ae3fa52).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607109

4. 窪田, 勉. エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer.

Degree: 2008, Saitama University / 埼玉大学

URL: http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=GM0000008

►

指導教員: 埼玉大学大学院理工学研究科教授坂本和彦

Atmospheric aerosols are important because of their capacity to scatter and absorb solar radiation, and to act as cloud condensation nuclei, hence… (more)

Subjects/Keywords: Aerosol Mass Spectrometer; suburban area; primary and secondary aerosol

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

窪田, �. (2008). エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer. (Thesis). Saitama University / 埼玉大学. Retrieved from http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=GM0000008

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):

窪田, 勉. “エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer.” 2008. Thesis, Saitama University / 埼玉大学. Accessed March 02, 2021. http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=GM0000008.

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

MLA Handbook (7^th Edition):

窪田, 勉. “エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer.” 2008. Web. 02 Mar 2021.

Vancouver:

窪田 �. エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer. [Internet] [Thesis]. Saitama University / 埼玉大学; 2008. [cited 2021 Mar 02]. Available from: http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=GM0000008.

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

Council of Science Editors:

窪田 �. エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer. [Thesis]. Saitama University / 埼玉大学; 2008. Available from: http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=GM0000008

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

University of California – Riverside

5. Chen, Chia-Li. Secondary Organic Aerosol Formation From Select Volatile Organic Compounds.

Degree: Chemical and Environmental Engineering, 2015, University of California – Riverside

URL: http://www.escholarship.org/uc/item/91n825wv

► This thesis enhances our understanding of secondary organic aerosol (SOA) formation from select anthropogenic sources including polycyclic aromatic hydrocarbons (PAHs), PAHs mixed with m-xylene and… (more)

▼ This thesis enhances our understanding of secondary organic aerosol (SOA) formation from select anthropogenic sources including polycyclic aromatic hydrocarbons (PAHs), PAHs mixed with m-xylene and an atmospheric surrogate, and unburned whole gasoline vapors. Major SOA chemical characteristics and physical properties were explored along with SOA formation within the UCR CE-CERT environmental chamber. SOA formation was significant for all three PAHs precursors during photooxidation under high NOx, low NOx and extremely low NOx conditions with 1-methylnaphthalene forming the most SOA followed by 2-methylnaphthalene and naphthalene. SOA yields greater than 1.0 were observed for extremely low NOx (H2O2) conditions. The atmospheric reactivity influenced by H2O2, NOx levels, initial VOCs/NO ratios, and all impacted the SOA formation from the PAH precursors. Fractal SOA particles were observed for 1-methylnaphthalene or 2-methylnaphthalene high NOx photooxidation, indicating that SOA in these experiments were solid particles. SOA growth rates (aerosol mass concentration (ΔM0) versus hydrocarbon reacted (ΔHC)) from different PAHs-m-xylene mixtures are correlated with initial m-xylene/NO, PAHs/NO, [OH]/[HO2] ratio, [NO]/[HO2] ratio and [HO2]/[RO2] ratio. Addition of m-xylene to PAHs experiments suppressed SOA formation from the PAH precursor. The chemical composition characteristics such as f44 versus f43 , H/C ratio, O/C ratio, and the oxidation state of the carbon (OSc) show that PAHs-m-xylene SOA continuously ages and the SOA exhibits characteristics of both individual precursors. Finally, the SOA formation from photooxidation of whole gasoline vapor under varying NOx conditions was found to range from 1.7% to 5.2%. Further, addition of ethanol suppressed the SOA formation. This work shows that the traditional two-product SOA formation model was unable to explain the total SOA formation from the complex gasoline mixture using the actual formation observed for individual aromatic SOA precursors.

Subjects/Keywords: Environmental science; Aerosol Mass Spectrometer (AMS); Aromatic; Atmospheric reactivity; Gasoline; Polycyclic aromatic hydrocarbon (PAH); Seondaty Organic Aerosol (SOA)

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Chen, C. (2015). Secondary Organic Aerosol Formation From Select Volatile Organic Compounds. (Thesis). University of California – Riverside. Retrieved from http://www.escholarship.org/uc/item/91n825wv

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):

Chen, Chia-Li. “Secondary Organic Aerosol Formation From Select Volatile Organic Compounds.” 2015. Thesis, University of California – Riverside. Accessed March 02, 2021. http://www.escholarship.org/uc/item/91n825wv.

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

MLA Handbook (7^th Edition):

Chen, Chia-Li. “Secondary Organic Aerosol Formation From Select Volatile Organic Compounds.” 2015. Web. 02 Mar 2021.

Vancouver:

Chen C. Secondary Organic Aerosol Formation From Select Volatile Organic Compounds. [Internet] [Thesis]. University of California – Riverside; 2015. [cited 2021 Mar 02]. Available from: http://www.escholarship.org/uc/item/91n825wv.

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

Council of Science Editors:

Chen C. Secondary Organic Aerosol Formation From Select Volatile Organic Compounds. [Thesis]. University of California – Riverside; 2015. Available from: http://www.escholarship.org/uc/item/91n825wv

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

Vilnius University

6. Garbarienė, Inga. Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis.

Degree: Dissertation, Physics, 2014, Vilnius University

URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264 ;

►

Disertacija skirta smulkiosios aerozolio dalelių frakcijos šaltinių, fizikinių ir cheminių savybių įvertinimui kompleksiškai apjungiant įvairius tyrimo metodus. Darbe susieti elementinės ir organinės anglies koncentracijų pokyčiai… (more)

▼

Disertacija skirta smulkiosios aerozolio dalelių frakcijos šaltinių, fizikinių ir cheminių savybių įvertinimui kompleksiškai apjungiant įvairius tyrimo metodus. Darbe susieti elementinės ir organinės anglies koncentracijų pokyčiai su tolimąja oro masių pernaša, įvertinta regiono bei vietinių šaltinių įtaka bendrai aerozolio dalelių taršai. Aprašyti anglies turinčių aerozolio dalelių pasiskirstymai pagal dydį foninėse vietovėse ir miesto aplinkoje. Naudojant aerozolio masių spektrometrą Preilos atmosferos užterštumo tyrimų stotyje buvo identifikuotas biogeninis organinių medžiagų šaltinis, kuris vidutiniškai sudaro 15 % nuo organinių medžiagų masės, tačiau Šiaurės Atlanto oro masėje biogeninių medžiagų indėlis siekia net 50 %. Atlikus kompleksinę aerozolio ir stabiliųjų anglies izotopų masių spektrometrinę analizę buvo nustatyta, kad pirminis anglies turinčio aerozolio dalelių šaltinis mieste yra autotransportas, o Rūgšteliškio foninėje vietovėje – biomasės deginimas. Taip pat buvo nustatyta, kad Vilniuje dominavo antropogeninės antrinės organinės medžiagos (76 %), o Rūgšteliškyje vyravo biogeninės antrinės organinės medžiagos (apie 50%). Vertinant tolimosios oro masių pernašos įtaką vietinės kilmės aerozolio dalelių formavimuisi ir kaitai, buvo nustatyta, kad vulkaninės kilmės aerozolio dalelės turi įtakos submikroninės aerozolio dalelių frakcijos koncentracijai, cheminei sudėčiai ir pasiskirstymui pagal dydį.

The objective of the work was to investigate physical and chemical properties and sources of the atmospheric aerosol particles in the submicron fraction by combining different analytical techniques. The dependence of concentrations of organic and elemental carbon in different air masses was determined and the contribution of regional and local sources to the net aerosol particle pollution was estimated. Analysis of the size distribution of carbonaceous aerosol particles in background and urban areas was performed. Biogenic organic aerosol made up 15 % of the organic aerosol mass at the Preila atmospheric pollution research station, but in the North Atlantic air masses this factor was up to 50 %. Aerosol and stable isotope ratio mass spectrometry has revealed that traffic is the primary source of aerosol particles in the city, while biomass burning is the primary source at the Rūgšteliškis background station. It was determined that secondary anthropogenic organic compounds were dominating (76 %) in Vilnius, while in Rūgšteliškis secondary biogenic organic compounds made up 50 % of the total organic aerosol mass. The influence of the long-range air mass transport on the local origin aerosol particle formation and transformation has been evaluated and it has been shown that volcanic aerosol particles can significantly change the concentration, chemical composition and size distribution of local aerosol particles in the submicron range.

Advisors/Committee Members: UNDZĖNAS, ALGIMANTAS (Doctoral dissertation committee chair), BUTKUS, DONATAS (Doctoral dissertation committee member), KIMTYS, LIUDVIKAS (Doctoral dissertation committee member), KLIUČININSKAS, LINAS (Doctoral dissertation committee member), RUSECKAS, ARVYDAS (Doctoral dissertation committee member), KVIETKUS, KĘSTUTIS (Doctoral dissertation advisor), MARTUZEVIČIUS, DAINIUS (Doctoral dissertation opponent), BYČENKIENĖ, STEIGVILĖ (Doctoral dissertation opponent).

Subjects/Keywords: Aerozolio dalelės; Cheminė sudėtis; Kilmė; Aerozolio masių spektrometras; Aerosol particles; Chemical composition; Origin; Aerosol mass spectrometer

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Garbarienė, I. (2014). Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis. (Doctoral Dissertation). Vilnius University. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264 ;

Chicago Manual of Style (16^th Edition):

Garbarienė, Inga. “Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis.” 2014. Doctoral Dissertation, Vilnius University. Accessed March 02, 2021. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264 ;.

MLA Handbook (7^th Edition):

Garbarienė, Inga. “Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis.” 2014. Web. 02 Mar 2021.

Vancouver:

Garbarienė I. Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis. [Internet] [Doctoral dissertation]. Vilnius University; 2014. [cited 2021 Mar 02]. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264 ;.

Council of Science Editors:

Garbarienė I. Atmosferos aerozolio submikroninės frakcijos dalelių kilmė, cheminė sudėtis bei formavimasis. [Doctoral Dissertation]. Vilnius University; 2014. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134611-00264 ;

Vilnius University

7. Garbarienė, Inga. Origin, chemical composition and formation of submicron aerosol particles in the atmosphere.

Degree: PhD, Physics, 2014, Vilnius University

URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680 ;

►

The objective of the work was to investigate physical and chemical properties and sources of the atmospheric aerosol particles in the submicron fraction by combining… (more)

▼

The objective of the work was to investigate physical and chemical properties and sources of the atmospheric aerosol particles in the submicron fraction by combining different analytical techniques. The dependence of concentrations of organic and elemental carbon in different air masses was determined and the contribution of regional and local sources to the net aerosol particle pollution was estimated. Analysis of the size distribution of carbonaceous aerosol particles in background and urban areas was performed. Biogenic organic aerosol made up 15 % of the organic aerosol mass at the Preila atmospheric pollution research station, but in the North Atlantic air masses this factor was up to 50 %. Aerosol and stable isotope ratio mass spectrometry has revealed that traffic is the primary source of aerosol particles in the city, while biomass burning is the primary source at the Rūgšteliškis background station. It was determined that secondary anthropogenic organic compounds were dominating (76 %) in Vilnius, while in Rūgšteliškis secondary biogenic organic compounds made up 50 % of the total organic aerosol mass. The influence of the long-range air mass transport on the local origin aerosol particle formation and transformation has been evaluated and it has been shown that volcanic aerosol particles can significantly change the concentration, chemical composition and size distribution of local aerosol particles in the submicron range.

Disertacija skirta smulkiosios aerozolio dalelių frakcijos šaltinių, fizikinių ir cheminių savybių įvertinimui kompleksiškai apjungiant įvairius tyrimo metodus. Darbe susieti elementinės ir organinės anglies koncentracijų pokyčiai su tolimąja oro masių pernaša, įvertinta regiono bei vietinių šaltinių įtaka bendrai aerozolio dalelių taršai. Aprašyti anglies turinčių aerozolio dalelių pasiskirstymai pagal dydį foninėse vietovėse ir miesto aplinkoje. Naudojant aerozolio masių spektrometrą Preilos atmosferos užterštumo tyrimų stotyje buvo identifikuotas biogeninis organinių medžiagų šaltinis, kuris vidutiniškai sudaro 15 % nuo organinių medžiagų masės, tačiau Šiaurės Atlanto oro masėje biogeninių medžiagų indėlis siekia net 50 %. Atlikus kompleksinę aerozolio ir stabiliųjų anglies izotopų masių spektrometrinę analizę buvo nustatyta, kad pirminis anglies turinčio aerozolio dalelių šaltinis mieste yra autotransportas, o Rūgšteliškio foninėje vietovėje – biomasės deginimas. Taip pat buvo nustatyta, kad Vilniuje dominavo antropogeninės antrinės organinės medžiagos (76 %), o Rūgšteliškyje vyravo biogeninės antrinės organinės medžiagos (apie 50%). Vertinant tolimosios oro masių pernašos įtaką vietinės kilmės aerozolio dalelių formavimuisi ir kaitai, buvo nustatyta, kad vulkaninės kilmės aerozolio dalelės turi įtakos submikroninės aerozolio dalelių frakcijos koncentracijai, cheminei sudėčiai ir pasiskirstymui pagal dydį.

Advisors/Committee Members: UNDZĖNAS, ALGIMANTAS (Doctoral dissertation committee chair), BUTKUS, DONATAS (Doctoral dissertation committee member), KIMTYS, LIUDVIKAS (Doctoral dissertation committee member), KLIUČININSKAS, LINAS (Doctoral dissertation committee member), RUSECKAS, ARVYDAS (Doctoral dissertation committee member), KVIETKUS, KĘSTUTIS (Doctoral dissertation advisor), MARTUZEVIČIUS, DAINIUS (Doctoral dissertation opponent), BYČENKIENĖ, STEIGVILĖ (Doctoral dissertation opponent).

Subjects/Keywords: Aerosol particles; Chemical composition; Origin; Aerosol mass spectrometer; Aerozolio dalelės; Cheminė sudėtis; Kilmė; Aerozolio masių spektrometras

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Garbarienė, I. (2014). Origin, chemical composition and formation of submicron aerosol particles in the atmosphere. (Doctoral Dissertation). Vilnius University. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680 ;

Chicago Manual of Style (16^th Edition):

Garbarienė, Inga. “Origin, chemical composition and formation of submicron aerosol particles in the atmosphere.” 2014. Doctoral Dissertation, Vilnius University. Accessed March 02, 2021. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680 ;.

MLA Handbook (7^th Edition):

Garbarienė, Inga. “Origin, chemical composition and formation of submicron aerosol particles in the atmosphere.” 2014. Web. 02 Mar 2021.

Vancouver:

Garbarienė I. Origin, chemical composition and formation of submicron aerosol particles in the atmosphere. [Internet] [Doctoral dissertation]. Vilnius University; 2014. [cited 2021 Mar 02]. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680 ;.

Council of Science Editors:

Garbarienė I. Origin, chemical composition and formation of submicron aerosol particles in the atmosphere. [Doctoral Dissertation]. Vilnius University; 2014. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2014~D_20140520_134625-72680 ;

8. 窪田, 勉. エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer.

Degree: 2008, Saitama University / 埼玉大学

URL: http://id.nii.ac.jp/1586/00010469/

►

Atmospheric aerosols are important because of their capacity to scatter and absorb solar radiation, and to act as cloud condensation nuclei, hence affecting radiative balance… (more)

Subjects/Keywords: Aerosol Mass Spectrometer; suburban area; primary and secondary aerosol

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

窪田, �. (2008). エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer. (Thesis). Saitama University / 埼玉大学. Retrieved from http://id.nii.ac.jp/1586/00010469/

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):

窪田, 勉. “エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer.” 2008. Thesis, Saitama University / 埼玉大学. Accessed March 02, 2021. http://id.nii.ac.jp/1586/00010469/.

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

MLA Handbook (7^th Edition):

窪田, 勉. “エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer.” 2008. Web. 02 Mar 2021.

Vancouver:

窪田 �. エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer. [Internet] [Thesis]. Saitama University / 埼玉大学; 2008. [cited 2021 Mar 02]. Available from: http://id.nii.ac.jp/1586/00010469/.

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

Council of Science Editors:

窪田 �. エアロゾル質量分析計を用いた大気中微小粒子の挙動調査 : Measurements of fine particles with an Aerosol Mass Spectrometer. [Thesis]. Saitama University / 埼玉大学; 2008. Available from: http://id.nii.ac.jp/1586/00010469/

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

University of Toronto

9. Rehbein, Peter J. G. The Characterization of Fine Particulate Matter in Toronto Using Single Particle Mass Spectrometry.

Degree: 2010, University of Toronto

URL: http://hdl.handle.net/1807/25904

►

An Aerosol Time-of-Flight Mass Spectrometer (ATOFMS) was used to obtain mass spectra of individual aerosol particles in the 0.5 – 2 µm size range in… (more)

Subjects/Keywords: atmospheric aerosol; single particle mass spectrometry; particulate matter; amine; particle characterization; source apportionment; cluster analysis; aerosol time-of-flight mass spectrometer; 0725; 0542

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Rehbein, P. J. G. (2010). The Characterization of Fine Particulate Matter in Toronto Using Single Particle Mass Spectrometry. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/25904

Chicago Manual of Style (16^th Edition):

Rehbein, Peter J G. “The Characterization of Fine Particulate Matter in Toronto Using Single Particle Mass Spectrometry.” 2010. Masters Thesis, University of Toronto. Accessed March 02, 2021. http://hdl.handle.net/1807/25904.

MLA Handbook (7^th Edition):

Rehbein, Peter J G. “The Characterization of Fine Particulate Matter in Toronto Using Single Particle Mass Spectrometry.” 2010. Web. 02 Mar 2021.

Vancouver:

Rehbein PJG. The Characterization of Fine Particulate Matter in Toronto Using Single Particle Mass Spectrometry. [Internet] [Masters thesis]. University of Toronto; 2010. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1807/25904.

Council of Science Editors:

Rehbein PJG. The Characterization of Fine Particulate Matter in Toronto Using Single Particle Mass Spectrometry. [Masters Thesis]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/25904

Washington State University

10. [No author]. CHARACTERIZATION OF PARTICULATE POLLUTION BY AEROSOL MASS SPECTROMETRY .

Degree: 2015, Washington State University

URL: http://hdl.handle.net/2376/6172

► Atmospheric aerosols impact human health, climate, and air pollution and arrive in the atmosphere by countless number of sources. One of the largest uncertainties in… (more)

▼ Atmospheric aerosols impact human health, climate, and air pollution and arrive in the atmosphere by countless number of sources. One of the largest uncertainties in understanding these impacts is due to limitations in our understanding of the organic aerosol (OA) components. To understand this complex mixture of thousands of compounds accurate high-resolution chemical speciation is needed. An Aerodyne High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS or HR-AMS) was deployed in two separate month-long studies to measure atmospheric particulate pollution. The first study, at the Lovelace Respiratory Research Institute (LRRI), focused on the measurement of gasoline and diesel engine exhaust under various loads and dilutions in controlled chamber experiments. HR-AMS data demonstrated clean signal associated with 53 polycyclic aromatic hydrocarbon (PAH) compounds. PAHs are of interest due to their carcinogenic implication and negative health effects especially when associated with submicron particles. From this work a novel methodology was developed for quantifying these compounds by their molecular ion signal (P-MIP). In the second study, conducted in Yakima, WA, ambient wintertime pollution was characterized and the OA components were deconvolved using positive matrix factorization (PMF). This investigation resulted in the identification of two new amine associated factors which were identified by mass spectra peaks from six dominant amine ions (C3H8N+, C2H6N2+, C4H10N+, C3H8N2+, C5H12N+, and C6H14N+). Amine ions are of interest to atmospheric research because of their implications on climate and formation of new particles. The unifying implication from both studies was the utilization of the HR-AMS to identify atmospheric pollutants that continue to generate ongoing research interests (due to their impacts on climate, pollution, or human health) and are typically difficult to measure by the HR-AMS. Additionally, included in this dissertation are four examples of science/engineering related inquiry-based lessons that were developed to relate well with my own Master’s research field and implemented into three high school science and math classrooms over the course of a two year NSF STEM Fellowship. Lastly, a two-year long case study following qualitative and quantitative data from 296 students one of these activities provides examples of the positive impact by these types of developed activities. Advisors/Committee Members: VanReken, Timothy M (advisor).

Subjects/Keywords: Chemical engineering; Environmental engineering; Aerosol Mass Spectrometer; Amine; Chemical speciation; Particle phase; polycyclic aromatic hydrocarbon; positive matrix factorization

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

author], [. (2015). CHARACTERIZATION OF PARTICULATE POLLUTION BY AEROSOL MASS SPECTROMETRY . (Thesis). Washington State University. Retrieved from http://hdl.handle.net/2376/6172

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):

author], [No. “CHARACTERIZATION OF PARTICULATE POLLUTION BY AEROSOL MASS SPECTROMETRY .” 2015. Thesis, Washington State University. Accessed March 02, 2021. http://hdl.handle.net/2376/6172.

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

MLA Handbook (7^th Edition):

author], [No. “CHARACTERIZATION OF PARTICULATE POLLUTION BY AEROSOL MASS SPECTROMETRY .” 2015. Web. 02 Mar 2021.

Vancouver:

author] [. CHARACTERIZATION OF PARTICULATE POLLUTION BY AEROSOL MASS SPECTROMETRY . [Internet] [Thesis]. Washington State University; 2015. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/2376/6172.

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

Council of Science Editors:

author] [. CHARACTERIZATION OF PARTICULATE POLLUTION BY AEROSOL MASS SPECTROMETRY . [Thesis]. Washington State University; 2015. Available from: http://hdl.handle.net/2376/6172

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

11. Tsimkouski, I. New methods to study composition and processes of atmospheric organics in the gas and the condensed phase.

Degree: 2015, University Utrecht

URL: https://dspace.library.uu.nl/handle/1874/302982 ; URN:NBN:NL:UI:10-1874-302982 ; 1874/302982 ; urn:isbn:9789053359860 ; URN:NBN:NL:UI:10-1874-302982 ; https://dspace.library.uu.nl/handle/1874/302982

► Volatile organic compounds (VOCs) and organic aerosols (OA) play an important role in the Earth’s atmosphere due to their influence on human health and climate.… (more)

▼ Volatile organic compounds (VOCs) and organic aerosols (OA) play an important role in the Earth’s atmosphere due to their influence on human health and climate. To be able to control amounts of VOCs and OA in the atmosphere, one has to understand the main sources of them and the effect of external factors on these sources. While many studies on the main VOC source (i.e. emission from plants) have been performed, there has been only a limited number of studies on how external factors such as environmental pollution effect plant emissions. Historically, OA is measured as bulk organic carbon. Measuring the chemical composition of OA is more challenging but nevertheless essential to fully understand secondary sources and climate effects of aerosols. The goal of this work was the development and validation of new methods that aim at providing new tools for innovative research in the abovementioned field. The first part of this work describes a newly developed setup in order to study the effect of pollution on VOCs emitted by plants. Various pollutants can be applied in the setup. The setup allows for in situ detailed measurements of changes in plant emissions and allows distinguishing isomeric compounds emitted by plants in normal conditions as well as under stress. The setup has been tested based on experiments with birch seedlings: their emissions were measured, oxidized and the oxidation products were measured as well. A reasonable agreement with literature data was observed. The second part of this work describes a new method called offline thermal-desorption proton-transfer-reaction mass-spectrometry (TD-PTR-MS), which allows for detailed and relatively cheap measurements of OA composition based on filter samples which can be collected in a broad range of locations. The method has been tested based on the inter-comparison with the proven in situ technique (in situ TD-PTR-MS) (e.g., Holzinger et al., 2010) and in general a good agreement between the two techniques was confirmed. However, it was found that for the filters sampled for one day, positive sampling artifacts caused by the adsorption of semivolatile organic species on the filters were high, which is in accordance with previous findings described in the literature. For the filters sampled for two and three days slight negative artifacts were observed likely caused by not complete desorption of aerosols off the filters at temperatures up to 3500C and potential chemical degradation of aerosols on the filters. The third part of this work shows the ability of the in situ TD-PTR-MS technique to reasonably measure total OA mass concentrations as well as speciated organics with a time resolution of 0.5 hour. The former is shown based on the comparison with aerosol mass spectrometer (AMS) measurements. The latter is done based on the inter-comparison with two-dimensional gas chromatography with a time-of-flight mass spectrometer (GC×GC/TOF-MS) technique. We found that species with mass concentrations above 2 ng/m3, as measured by GC×GC/TOF-MS, were reasonably… Advisors/Committee Members: Roeckmann, Thomas, Holzinger, Rupert.

Subjects/Keywords: volatile organic compounds; organic aerosol; plant emissions; mass spectrometer

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Tsimkouski, I. (2015). New methods to study composition and processes of atmospheric organics in the gas and the condensed phase. (Doctoral Dissertation). University Utrecht. Retrieved from https://dspace.library.uu.nl/handle/1874/302982 ; URN:NBN:NL:UI:10-1874-302982 ; 1874/302982 ; urn:isbn:9789053359860 ; URN:NBN:NL:UI:10-1874-302982 ; https://dspace.library.uu.nl/handle/1874/302982

Chicago Manual of Style (16^th Edition):

Tsimkouski, I. “New methods to study composition and processes of atmospheric organics in the gas and the condensed phase.” 2015. Doctoral Dissertation, University Utrecht. Accessed March 02, 2021. https://dspace.library.uu.nl/handle/1874/302982 ; URN:NBN:NL:UI:10-1874-302982 ; 1874/302982 ; urn:isbn:9789053359860 ; URN:NBN:NL:UI:10-1874-302982 ; https://dspace.library.uu.nl/handle/1874/302982.

MLA Handbook (7^th Edition):

Tsimkouski, I. “New methods to study composition and processes of atmospheric organics in the gas and the condensed phase.” 2015. Web. 02 Mar 2021.

Vancouver:

Tsimkouski I. New methods to study composition and processes of atmospheric organics in the gas and the condensed phase. [Internet] [Doctoral dissertation]. University Utrecht; 2015. [cited 2021 Mar 02]. Available from: https://dspace.library.uu.nl/handle/1874/302982 ; URN:NBN:NL:UI:10-1874-302982 ; 1874/302982 ; urn:isbn:9789053359860 ; URN:NBN:NL:UI:10-1874-302982 ; https://dspace.library.uu.nl/handle/1874/302982.

Council of Science Editors:

Tsimkouski I. New methods to study composition and processes of atmospheric organics in the gas and the condensed phase. [Doctoral Dissertation]. University Utrecht; 2015. Available from: https://dspace.library.uu.nl/handle/1874/302982 ; URN:NBN:NL:UI:10-1874-302982 ; 1874/302982 ; urn:isbn:9789053359860 ; URN:NBN:NL:UI:10-1874-302982 ; https://dspace.library.uu.nl/handle/1874/302982

Utah State University

12. Erupe, Mark E. Sources and Source Processes of Organic Nitrogen Aerosols in the Atmosphere.

Degree: PhD, Chemistry and Biochemistry, 2008, Utah State University

URL: https://digitalcommons.usu.edu/etd/196

► The research in this dissertation explored the sources and chemistry of organic nitrogen aerosols in the atmosphere. Two approaches were employed: field measurements and… (more)

▼ The research in this dissertation explored the sources and chemistry of organic nitrogen aerosols in the atmosphere. Two approaches were employed: field measurements and laboratory experiments. In order to characterize atmospheric aerosol, two ambient studies were conducted in Cache Valley in Northern Utah during strong winter inversions of 2004 and 2005. The economy of this region is heavily dependent on agriculture. There is also a fast growing urban population. Urban and agricultural emissions, aided by the valley geography and meteorology, led to high concentrations of fine particles that often exceeded the national ambient air quality standards. Aerosol composition was dominated by ammonium nitrate and organic species. Mass spectra from an aerosol mass spectrometer revealed that the organic ion peaks were consistent with reduced organic nitrogen compounds, typically associated with animal husbandry practices. Although no direct source characterization studies have been undertaken in Cache Valley with an aerosol mass spectrometer, spectra from a study at a swine facility in Ames, Iowa, did not show any evidence of reduced organic nitrogen species. This, combined with temporal and diurnal characteristics of organic aerosol peaks, was a pointer that the organic nitrogen species in Cache Valley likely formed from secondary chemistry. Application of multivariate statistical analyses to the organic aerosol spectra further supported this hypothesis. To quantify organic nitrogen signals observed in ambient studies as well as understand formation chemistry, three categories of laboratory experiments were performed. These were calibration experiments, smog chamber studies, and an analytical method development. Laboratory calibration experiments using standard calibrants indicated that quantifying the signals from organic nitrogen species was dependent on whether they formed through acid-base chemistry or via secondary organic aerosol pathway. Results from smog chamber reactions of amines with ozone, nitrogen oxides, nitrate radical, and nitric acid showed that the secondary organic aerosol pathway was more plausible than acid-base chemistry, thus making the contribution of the organic nitrogen species to the total aerosol mass in Cache Valley significant. Gas phase and aerosol products formed from the smog chamber reactions were identified and used to devise reaction mechanisms. Finally, an ion chromatographic method for detecting and quantifying some key organic nitrogen species in aerosol was developed and tested. Advisors/Committee Members: Philip J. Silva, Robert S. Brown, Stephen E. Bialkowski, ;.

Subjects/Keywords: Aerosol Mass Spectrometer; Amines; Secondary Organic Aerosol; Smog Chamber; Analytical Chemistry

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Erupe, M. E. (2008). Sources and Source Processes of Organic Nitrogen Aerosols in the Atmosphere. (Doctoral Dissertation). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/196

Chicago Manual of Style (16^th Edition):

Erupe, Mark E. “Sources and Source Processes of Organic Nitrogen Aerosols in the Atmosphere.” 2008. Doctoral Dissertation, Utah State University. Accessed March 02, 2021. https://digitalcommons.usu.edu/etd/196.

MLA Handbook (7^th Edition):

Erupe, Mark E. “Sources and Source Processes of Organic Nitrogen Aerosols in the Atmosphere.” 2008. Web. 02 Mar 2021.

Vancouver:

Erupe ME. Sources and Source Processes of Organic Nitrogen Aerosols in the Atmosphere. [Internet] [Doctoral dissertation]. Utah State University; 2008. [cited 2021 Mar 02]. Available from: https://digitalcommons.usu.edu/etd/196.

Council of Science Editors:

Erupe ME. Sources and Source Processes of Organic Nitrogen Aerosols in the Atmosphere. [Doctoral Dissertation]. Utah State University; 2008. Available from: https://digitalcommons.usu.edu/etd/196

13. Φλώρου, Καλλιόπη. Continuous real-time measurement of the chemical composition of atmospheric particles in Greece using aerosol mass spectrometry.

Degree: 2014, University of Patras

URL: http://hdl.handle.net/10889/8079

► Atmospheric aerosol is an important component of our atmosphere influencing human health, regional and global atmospheric chemistry and climate. The organic component of submicron aerosol… (more)

▼ Atmospheric aerosol is an important component of our atmosphere influencing human health, regional and global atmospheric chemistry and climate. The organic component of submicron aerosol contributes around 50% of its mass and is a complex mixture of tens of thousands of compounds. Real-time aerosol mass spectrometry was the major measurement tool used in this work. The Aerodyne High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS) can quantitatively measure the chemical composition and size distribution of non-refractory submicron aerosol (NR-PM1). The mass spectra provided by the instrument every few minutes contain information about aerosol sources and processes. This thesis uses the HR-ToF-AMS measurements in two areas of Greece to quantify the contributions of organic aerosol sources to the corresponding organic aerosol levels. Local and regional air pollution sources were monitored and characterized in two sites during intensive campaigns. The first campaign took place during the fall of 2011 (September 24 to October 23) in Finokalia, Crete, a remote-background coastal site without any major human activity. The aim of the study was to quantify the extent of oxidation of the organic aerosol (OA) during autumn, a season neither too hot nor cold, with reduced solar radiation in comparison to summer. The second one took place during the winter of 2012 (February 26 to March 5), in the third major city of Greece, Patras. The measurements were conducted in the campus of the Technological Educational Institute of Patras (TEI), in order to quantify the severity of the wintertime air pollution problem in the area and its sources. The contributions of traffic and residential wood burning were the foci of that study. The Finokalia site is isolated and far away from anthropogenic sources of pollution, making it ideal for the study of organic aerosol coming from different directions, usually exposed to high levels of atmospheric oxidants. The fine PM measured during the Finokalia Atmospheric Measurement Experiment (FAME-11) by the AMS and a Multi Angle Absorption Photometer (MAAP) was mostly ammonium sulfate and bisulfate (60%), organic compounds (34%), and BC (5%). The aerosol sampled originated mainly from Turkey during the first days of the study, but also from Athens and Northern Greece during the last days of the campaign. By performing Positive Matrix Factorization (PMF) analysis on the AMS organic spectra for the whole dataset the organic aerosol (OA) composition could be explained by two components: a low volatility factor (LV-OOA) and a semi-volatile one (SV-OOA). Hydrocarbon-like organic aerosol (HOA) was not present, consistent with the lack of strong local sources. The second field campaign took place in the suburbs of the city of Patras, 4 km away from the city center during the winter of 2012. During this 10-day campaign, organics were responsible for 70% during the day and 80% during the evening of the total PM1. The OA mean concentration during that period was approximately 20 μg m-3 and… Advisors/Committee Members: Πανδής, Σπύρος, Florou, Kalliope, Κουτσούκος, Πέτρος, Μιχαλόπουλος, Νικόλαος.

Subjects/Keywords: Aerosol Mass Spectrometer (AMS); Aerosols; Positive matrix factorisation (PMF); Wood burning; 551.511 3; Φασματογραφία μάζης αιωρούμενων σωματιδίων; Αιωρούμενα σωματίδια; Παραγοντοποίηση θετικής μήτρας; Καύση ξύλων

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Φλώρου, �. (2014). Continuous real-time measurement of the chemical composition of atmospheric particles in Greece using aerosol mass spectrometry. (Masters Thesis). University of Patras. Retrieved from http://hdl.handle.net/10889/8079

Chicago Manual of Style (16^th Edition):

Φλώρου, Καλλιόπη. “Continuous real-time measurement of the chemical composition of atmospheric particles in Greece using aerosol mass spectrometry.” 2014. Masters Thesis, University of Patras. Accessed March 02, 2021. http://hdl.handle.net/10889/8079.

MLA Handbook (7^th Edition):

Φλώρου, Καλλιόπη. “Continuous real-time measurement of the chemical composition of atmospheric particles in Greece using aerosol mass spectrometry.” 2014. Web. 02 Mar 2021.

Vancouver:

Φλώρου �. Continuous real-time measurement of the chemical composition of atmospheric particles in Greece using aerosol mass spectrometry. [Internet] [Masters thesis]. University of Patras; 2014. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10889/8079.

Council of Science Editors:

Φλώρου �. Continuous real-time measurement of the chemical composition of atmospheric particles in Greece using aerosol mass spectrometry. [Masters Thesis]. University of Patras; 2014. Available from: http://hdl.handle.net/10889/8079

University of Manchester

14. Young, Dominique Emma. Characterisation of the chemical properties and behaviour of aerosols in the urban environment.

Degree: PhD, 2014, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-the-chemical-properties-and-behaviour-of-aerosols-in-the-urban-environment(27de7e50-5069-40a0-b5cd-1370747f646a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632223

► Atmospheric aerosols have adverse effects on human health, air quality, and visibility and frequently result in severe pollution events, particularly in urban areas. However, the… (more)

▼ Atmospheric aerosols have adverse effects on human health, air quality, and visibility and frequently result in severe pollution events, particularly in urban areas. However, the sources of aerosols and the processes governing their behaviour in the atmosphere, including those which lead to high concentrations, are not well understood thus limit our ability to accurately assess and forecast air quality. Presented here are the first long-term chemical composition measurements from an urban environment using an Aerodyne compact Time-of-Flight Aerosol Mass Spectrometer (cToF-AMS). Organic aerosols (OA) were observed to account for a significant fraction (44%) of the total non-refractory submicron mass during 2012 at the urban background site in North Kensington, London, followed by nitrate (28%), sulphate (14%), ammonium (13%), and chloride (1%). The sources and components of OA were determined using Positive Matrix Factorisation (PMF) and attributed as hydrocarbon-like OA (HOA), cooking OA (COA), solid fuel OA (SFOA), type 1 oxygenated OA (OOA1), and type 2 oxygenated OA (OOA2), where HOA, COA, and SFOA were observed to be of equal importance across the year. The concentration of secondary OA increased during the summer yet the extent of oxidation, as defined by the oxygen content, showed no variability during the year. The main factors governing the diurnal, monthly, and seasonal trends observed in all organic and inorganic species were meteorological conditions, specific nature of the sources, and availability of precursors. Regional and transboundary pollution influenced total aerosol concentrations and high concentration events were observed to be governed by different factors depending on season. High-Resolution ToF-AMS measurements were used to further probe OA behaviour, where two SFOA factors were derived from PMF analysis in winter, which likely represent differences in burn conditions. In the summer an OA factor was identified, likely of primary origin, which was observed to be strongly associated with organic nitrates and anthropogenic emissions. This work uses instruments and techniques that have not previously been used in this way in an urban environment, where the results further the understanding of the chemical components of urban aerosols. Aerosol sources are likely to change in the future with increases in solid fuel burning as vehicular emissions decrease, with significant implications on air quality and health. Thus it is important to understand aerosol sources and behaviour in order to develop effective pollution abatement strategies.

Subjects/Keywords: 628.5; Aerosols; Aerosol Mass Spectrometer (AMS); Urban; Air quality; Chemical composition; Positive matrix factorisation (PMF); Human health; Pollution; Organic aerosols; Solid fuel; Cooking; Secondary inorganic aerosols

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Young, D. E. (2014). Characterisation of the chemical properties and behaviour of aerosols in the urban environment. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-the-chemical-properties-and-behaviour-of-aerosols-in-the-urban-environment(27de7e50-5069-40a0-b5cd-1370747f646a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632223

Chicago Manual of Style (16^th Edition):

Young, Dominique Emma. “Characterisation of the chemical properties and behaviour of aerosols in the urban environment.” 2014. Doctoral Dissertation, University of Manchester. Accessed March 02, 2021. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-the-chemical-properties-and-behaviour-of-aerosols-in-the-urban-environment(27de7e50-5069-40a0-b5cd-1370747f646a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632223.

MLA Handbook (7^th Edition):

Young, Dominique Emma. “Characterisation of the chemical properties and behaviour of aerosols in the urban environment.” 2014. Web. 02 Mar 2021.

Vancouver:

Young DE. Characterisation of the chemical properties and behaviour of aerosols in the urban environment. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Mar 02]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-the-chemical-properties-and-behaviour-of-aerosols-in-the-urban-environment(27de7e50-5069-40a0-b5cd-1370747f646a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632223.

Council of Science Editors:

Young DE. Characterisation of the chemical properties and behaviour of aerosols in the urban environment. [Doctoral Dissertation]. University of Manchester; 2014. Available from: https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-the-chemical-properties-and-behaviour-of-aerosols-in-the-urban-environment(27de7e50-5069-40a0-b5cd-1370747f646a).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.632223

15. Jolleys, Matthew. A global analysis of biomass burning organic aerosol.

Degree: 2013, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:215748

► Organic aerosols represent one of the main sources of uncertainty affecting attempts to quantify anthropogenic climate change. The diverse physical and chemical properties of organic… (more)

▼ Organic aerosols represent one of the main sources of uncertainty affecting attempts to quantify anthropogenic climate change. The diverse physical and chemical properties of organic aerosols and the varied pathways involved in their formation and aging form the basis of this uncertainty, preventing extensive and accurate representation within regional and global scale models. This inability to constrain the radiative forcings produced by organic aerosols within the atmosphere consequently acts as a limitation to the wider objective of providing reliable projections of future climate. Biomass burning constitutes one of the main anthropogenic contributions to the global atmospheric organic aerosol (OA) burden, particularly in tropical regions where the potential for perturbations to the climate system is also enhanced due to higher average levels of solar irradiance. Emissions from biomass burning have been the subject of an intense research focus in recent years, involving a combination of field campaigns and laboratory studies. These experiments have aimed to improve the limited understanding of the processes involved in the evolution of biomass burning organic aerosol (BBOA) and contribute towards the development of more robust parameterisations for climate and chemical transport models. The main objective of this thesis was to use datasets acquired from several different global regions to perform a broad analysis of the BBOA fraction, with the extensive temporal and spatial scales provided by such measurements enabling investigation of a number of key uncertainties, including regional variability in emissions and the role of secondary organic aerosol (SOA) formation in aging smoke plumes.Measurements of BBOA mass concentration obtained using Aerodyne Research Inc. Aerosol Mass Spectrometers (AMS) were used to calculate characteristic ΔOA/ΔCO ratios for different environments, accounting for the effects of dilution and contrasting fire sizes to give a proportional representation of OA production. High levels of variability in average ΔOA/ΔCO were observed both between and within different regions. The scale of this variability consistently exceeded any differences between plumes of different ages, while a widespread absence of any sustained increase in ΔOA/ΔCO with aging indicates that SOA formation does not provide a net increase in OA mass. Despite this lack of OA enhancement, increasing proportions of oxygenated OA components in aged plumes highlight the chemical transformations occurring during the evolution of BBOA, and the additional influence of OA loss through evaporation or deposition.Potential drivers of variability in ΔOA/ΔCO at source, such as changes in fuel types and combustion conditions, were investigated for controlled fires carried out within a combustion chamber. These laboratory experiments revealed a number of complex relationships between BB emissions and source conditions. Although ΔOA/ΔCO was shown to be influenced by both fuel properties and transitions between flaming and smouldering… Advisors/Committee Members: MCFIGGANS, GORDON GB, Coe, Hugh, Mcfiggans, Gordon.

Subjects/Keywords: biomass burning; organic aerosol; emission ratios; aerosol mass spectrometer; aircraft measurements; field campaigns; combustion chamber; aerosol aging

…African Monsoon Multidisciplinary Analysis AMS Aerosol Mass Spectrometer ARCTAS Arctic… …Quadrupole Aerosol Mass Spectrometer RH Relative Humidity SV-OOA Semi-Volatile Oxygenated… …urban downwind and remote locations (Figure 3) using an aerosol mass spectrometer… …CCN Cloud Condensation Nucleus CIMS Chemical Ionisation Mass Spectrometer CE Collection… …Efficiency CPC Condensation Particle Counter C-ToF-AMS Compact Time of Flight Aerosol Mass…

10 more images…

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jolleys, M. (2013). A global analysis of biomass burning organic aerosol. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:215748

Chicago Manual of Style (16^th Edition):

Jolleys, Matthew. “A global analysis of biomass burning organic aerosol.” 2013. Doctoral Dissertation, University of Manchester. Accessed March 02, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:215748.

MLA Handbook (7^th Edition):

Jolleys, Matthew. “A global analysis of biomass burning organic aerosol.” 2013. Web. 02 Mar 2021.

Vancouver:

Jolleys M. A global analysis of biomass burning organic aerosol. [Internet] [Doctoral dissertation]. University of Manchester; 2013. [cited 2021 Mar 02]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:215748.

Council of Science Editors:

Jolleys M. A global analysis of biomass burning organic aerosol. [Doctoral Dissertation]. University of Manchester; 2013. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:215748

Universiteit Utrecht

16. Saris, L.P. Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS.

Degree: 2014, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/298264

► The uncertainty of the past aerosol composition affects the reliability of estimates made of their effect on Earth's radiation budget. In this report, a method… (more)

Subjects/Keywords: aerosols; organics; Proton transfer reaction time of flight mass spectrometer; PTR-ToF-MS; Cabauw; CESAR; climate; evaporation; surface artefacts; PTR-ice; PTR-cone; TD-PTR-MS; ice; past composition; composition; radiative forcing; SOA; secondary organic aerosol; CCN; cloud condensation nuclei; ice nuclei; ionization

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Saris, L. P. (2014). Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/298264

Chicago Manual of Style (16^th Edition):

Saris, L P. “Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS.” 2014. Masters Thesis, Universiteit Utrecht. Accessed March 02, 2021. http://dspace.library.uu.nl:8080/handle/1874/298264.

MLA Handbook (7^th Edition):

Saris, L P. “Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS.” 2014. Web. 02 Mar 2021.

Vancouver:

Saris LP. Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS. [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2021 Mar 02]. Available from: http://dspace.library.uu.nl:8080/handle/1874/298264.

Council of Science Editors:

Saris LP. Development of a method for measuring organic compounds in ice samples using PTR-ToF-MS. [Masters Thesis]. Universiteit Utrecht; 2014. Available from: http://dspace.library.uu.nl:8080/handle/1874/298264

University of Georgia

17. Hearn, John Daniel. Development of aerosol chemical ionization mass spectrometry for the study of organic particles.

Degree: 2014, University of Georgia

URL: http://hdl.handle.net/10724/23859

► An aerosol chemical ionization mass spectrometer (A-CIMS) has been developed for the study of organic particles. The low degree of fragmentation from this soft ionization… (more)

Subjects/Keywords: An aerosol chemical ionization mass spectrometer (A-CIMS) has been developed for the study of organic particles. The low degree of fragmentation from this soft ionization technique enables detection of intact molecular ions which simplifies quantificati

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Hearn, J. D. (2014). Development of aerosol chemical ionization mass spectrometry for the study of organic particles. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/23859

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):

Hearn, John Daniel. “Development of aerosol chemical ionization mass spectrometry for the study of organic particles.” 2014. Thesis, University of Georgia. Accessed March 02, 2021. http://hdl.handle.net/10724/23859.

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

MLA Handbook (7^th Edition):

Hearn, John Daniel. “Development of aerosol chemical ionization mass spectrometry for the study of organic particles.” 2014. Web. 02 Mar 2021.

Vancouver:

Hearn JD. Development of aerosol chemical ionization mass spectrometry for the study of organic particles. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10724/23859.

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

Council of Science Editors:

Hearn JD. Development of aerosol chemical ionization mass spectrometry for the study of organic particles. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/23859

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

18. Leglise, Joris. Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures : Study of secondary organic aerosol formation by mass spectrometry from the ozonolysis of unsaturated volatile organic compounds.

Degree: Docteur es, Chimie et Physique de l’Environnement, 2019, Université d'Orléans

URL: http://www.theses.fr/2019ORLE3013

►

La compréhension de la formation des aérosols organiques secondaires (AOS) reste lacunaire, notamment lors de l’ozonolyse de composés organiques volatils (COV) insaturés. La mesure de… (more)

▼

La compréhension de la formation des aérosols organiques secondaires (AOS) reste lacunaire, notamment lors de l’ozonolyse de composés organiques volatils (COV) insaturés. La mesure de composés de faible volatilité participant à la génération des AOS est un défi auquel la communauté scientifique tente de répondre. Un des objectifs de ce travail de thèse était l’installation et l’emploi d’un système d’échantillonnage et de mesure de la composition chimique de l’aérosol par spectrométrie de masse à ionisation chimique (FIGAERO-CI-ToF-MS). Cet instrument a été utilisé dans le cadre de l’ozonolyse de COV insaturés dans la chambre de simulation atmosphérique HELIOS et a permis d’évaluer les conditions de formation d’acides carboxyliques et de composés organosoufrés. Les voies de formation spécifiques des organosulfates (OS) ont par ailleurs été étudiées en injectant des particules d’ensemencement acidifiées. Cette étude a confirmé la faible efficacité de l’estérification des groupements hydroxyles. A l’inverse, la formation d’OS par ouverture de cycle époxyde est plus efficace et augmente à pH plus acide. Par ailleurs, l’augmentation de l’humidité relative a un impact positif sur la génération d’acides carboxyliques en phase particulaire.Un deuxième objectif était la caractérisation d’un système de collecte de l’aérosol et de mesure de sa composition chimique, couplé à un spectromètre de masse à transfert de protons (CHARON-PTR-ToF-MS). La mesure de la fragmentation de 26 composés purs en phase particulaire a permis le développement d’une procédure corrective tenant compte du phénomène de fragmentation. Cette procédure a été appliquée à la mesure d’AOS générés par l’ozonolyse de COV biogéniques en réacteur a écoulement. La volatilité de l’aérosol produit a été estimée par l’installation d’un tube thermodénudeur. La prise en compte de la fragmentation a grandement amélioré l’accord entre la mesure de la volatilité et son calcul par plusieurs équations paramétriques.

The understanding of secondary organic aerosols (SOA) is still incomplete, especially from the ozonolysis of unsaturated volatile organic compounds (VOC). The measurement of low volatility compounds involved in SOA formation is a challenge that the scientific community attempts to address. One of the objectives of this thesis work was the installation and use of a system for sampling and measuring the chemical composition of the aerosol by chemical ionization mass spectrometry (FIGAERO-CI-ToF-MS). This instrument has been used in the ozonolysis of unsaturated VOCs in the atmospheric simulation chamber HELIOS and the conditions for the formation of carboxylic acids and organosulfur compounds has been evaluated. The specific formation pathways of organosulfates (OS) have in addition been studied by injecting acidified seed particles. This study confirmed the low efficiency of the esterification of hydroxyl groups. Conversely, OS formation by epoxide ring opening is more efficient and increases with more acidic pH. In addition, the increase in relative humidity…

Advisors/Committee Members: Mellouki, Abdelwahid (thesis director), Daële, Véronique (thesis director).

Subjects/Keywords: Composés organiques volatils; Aérosols organiques secondaires; Spectrométrie de masse à ionisation chimique; Composition chimique de l’aérosol; Volatilité; Organosulfates; Volatile organic compounds; Secondary organic aerosols; Chemical ionization mass spectrometer; Aerosol chemical composition; Volatility; Organosulfates; 541

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Leglise, J. (2019). Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures : Study of secondary organic aerosol formation by mass spectrometry from the ozonolysis of unsaturated volatile organic compounds. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2019ORLE3013

Chicago Manual of Style (16^th Edition):

Leglise, Joris. “Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures : Study of secondary organic aerosol formation by mass spectrometry from the ozonolysis of unsaturated volatile organic compounds.” 2019. Doctoral Dissertation, Université d'Orléans. Accessed March 02, 2021. http://www.theses.fr/2019ORLE3013.

MLA Handbook (7^th Edition):

Leglise, Joris. “Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures : Study of secondary organic aerosol formation by mass spectrometry from the ozonolysis of unsaturated volatile organic compounds.” 2019. Web. 02 Mar 2021.

Vancouver:

Leglise J. Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures : Study of secondary organic aerosol formation by mass spectrometry from the ozonolysis of unsaturated volatile organic compounds. [Internet] [Doctoral dissertation]. Université d'Orléans; 2019. [cited 2021 Mar 02]. Available from: http://www.theses.fr/2019ORLE3013.

Council of Science Editors:

Leglise J. Etude de la formation d'aérosols organiques secondaires par spectométrie de masse lors de l'ozonolyse de composés organiques volatils insatures : Study of secondary organic aerosol formation by mass spectrometry from the ozonolysis of unsaturated volatile organic compounds. [Doctoral Dissertation]. Université d'Orléans; 2019. Available from: http://www.theses.fr/2019ORLE3013

19. Young, Dominique Emma. Characterisation of the Chemical Properties and Behaviour of Aerosols in the Urban Environment.

Degree: 2014, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:238054

► Atmospheric aerosols have adverse effects on human health, air quality, and visibility and frequently result in severe pollution events, particularly in urban areas. However, the… (more)

▼ Atmospheric aerosols have adverse effects on human health, air quality, and visibility and frequently result in severe pollution events, particularly in urban areas. However, the sources of aerosols and the processes governing their behaviour in the atmosphere, including those which lead to high concentrations, are not well understood thus limit our ability to accurately assess and forecast air quality.Presented here are the first long-term chemical composition measurements from an urban environment using an Aerodyne compact Time-of-Flight Aerosol Mass Spectrometer (cToF-AMS). Organic aerosols (OA) were observed to account for a significant fraction (44%) of the total non-refractory submicron mass during 2012 at the urban background site in North Kensington, London, followed by nitrate (28%), sulphate (14%), ammonium (13%), and chloride (1%). The sources and components of OA were determined using Positive Matrix Factorisation (PMF) and attributed as hydrocarbon-like OA (HOA), cooking OA (COA), solid fuel OA (SFOA), type 1 oxygenated OA (OOA1), and type 2 oxygenated OA (OOA2), where HOA, COA, and SFOA were observed to be of equal importance across the year. The concentration of secondary OA increased during the summer yet the extent of oxidation, as defined by the oxygen content, showed no variability during the year.The main factors governing the diurnal, monthly, and seasonal trends observed in all organic and inorganic species were meteorological conditions, specific nature of the sources, and availability of precursors. Regional and transboundary pollution influenced total aerosol concentrations and high concentration events were observed to be governed by different factors depending on season. High-Resolution ToF-AMS measurements were used to further probe OA behaviour, where two SFOA factors were derived from PMF analysis in winter, which likely represent differences in burn conditions. In the summer an OA factor was identified, likely of primary origin, which was observed to be strongly associated with organic nitrates and anthropogenic emissions.This work uses instruments and techniques that have not previously been used in this way in an urban environment, where the results further the understanding of the chemical components of urban aerosols. Aerosol sources are likely to change in the future with increases in solid fuel burning as vehicular emissions decrease, with significant implications on air quality and health. Thus it is important to understand aerosol sources and behaviour in order to develop effective pollution abatement strategies. Advisors/Committee Members: ALLAN, JAMES JD, Coe, Hugh, Allan, James.

Subjects/Keywords: Aerosols; Aerosol Mass Spectrometer (AMS); Urban; Air quality; Chemical composition; Positive matrix factorisation (PMF); Human health; Pollution; Organic aerosols; Solid fuel; Cooking; Secondary inorganic aerosols

…quality models. The Aerodyne Aerosol Mass Spectrometer (AMS) can quantitatively… …this thesis, namely the Aerosol Mass Spectrometer (AMS) and Positive Matrix… …analysis techniques The Aerodyne Aerosol Mass Spectrometer (AMS) can quantitatively… …the total aerosol mass, such particles are present in the atmosphere in very low numbers… …the dry deposition velocity of aerosols. For large particles the aerosol mass density is…

10 more images…

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Young, D. E. (2014). Characterisation of the Chemical Properties and Behaviour of Aerosols in the Urban Environment. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:238054

Chicago Manual of Style (16^th Edition):

Young, Dominique Emma. “Characterisation of the Chemical Properties and Behaviour of Aerosols in the Urban Environment.” 2014. Doctoral Dissertation, University of Manchester. Accessed March 02, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:238054.

MLA Handbook (7^th Edition):

Young, Dominique Emma. “Characterisation of the Chemical Properties and Behaviour of Aerosols in the Urban Environment.” 2014. Web. 02 Mar 2021.

Vancouver:

Young DE. Characterisation of the Chemical Properties and Behaviour of Aerosols in the Urban Environment. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2021 Mar 02]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:238054.

Council of Science Editors:

Young DE. Characterisation of the Chemical Properties and Behaviour of Aerosols in the Urban Environment. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:238054

20. Nuaaman, Ibraheem M. Investigation of Air Pollutants Near the Great Lakes in Ontario and Along the Coast of California.

Degree: PhD, Chemistry, 2015, York University

URL: http://hdl.handle.net/10315/30094

► This dissertation is of two parts. In the first part, carbonyls were measured in Ridgetown, Ontario using an automated HPLC-DNPH system during the BAQS-Met study… (more)

▼ This dissertation is of two parts. In the first part, carbonyls were measured in Ridgetown, Ontario using an automated HPLC-DNPH system during the BAQS-Met study in 2007. Median concentrations for formaldehyde, acetaldehyde, acetone, propanal, MEK and butanal were observed to be 1.5, 0.67, 1.9, 0.072, 0.22 and 0.041 ppb respectively. The highest carbonyl concentrations were observed with trans-boundary transport associated with airmasses that passed over Michigan and Illinois and could have originated from the Ohio Valley. Local ozone sensitivity was established using the HCHO/NO2 ratio and this area was found to be sensitive to both VOCs and NOx. Carbonyls accounted for 35% of O3 formation estimated using the MIR scale. Lake breeze events had no significant impact on carbonyl concentrations in this location. In the second part of this dissertation, aerosol concentrations and composition were obtained along the coast of California using a High-Resolution Time-of-Flight aerosol mass spectrometer (HR-AMS) onboard RV Atlantis during CalNex in 2010. Measured submicron aerosols were dominated by particulate sulfate and particulate organic matter (pOM), which accounted for 86% of all measured submicron aerosol mass. High aerosol concentrations were associated with land breezes from polluted cities while low concentrations were observed with sea breezes. For the first time, a method is proposed to establish non-refractory particulate chloride (NR p-Cl) in ambient air that is enriched with sea salt chloride. This method involves the subtraction of refractory chloride signal (RF HxCl+), which was estimated using the HxCl+ (total chloride signal) to Na35Cl+ ratio in artificially generated sea spray aerosols. Also for the first time, a method is proposed to determine percentage chloride depletion in ambient aerosols using HR-AMS measurements of Na+ and Na35Cl+. Using this proposed method, study-wide median chloride depletion in submicron aerosols was determined to be 78%. For NR p-Cl, increasing concentrations were observed with increasing RH and pH and decreasing temperature. Finally, pOM in sea spray aerosols was observed to be dominated by hydrocarbons (55%) and oxygenated hydrocarbon classes (37%); this pOM was found to be positively correlated with seawater DMS. Advisors/Committee Members: McLaren, Robert (advisor).

Subjects/Keywords: Atmospheric chemistry; Atmospheric sciences; Chemistry; Atmospheric chemistry; Troposphere; Aerosols; AMS; HR-AMS; HR-ToF-AMS; Refractory; Non-refractory; Chloride; Sulfate; Nitrate; Ammonium; Sea salt; Na35Cl+; Lake breeze; Land breeze; Sea breeze; Sea spray; Organics; Chloride depletion; Method; Carbonyls; Interference; Submicron; Particulate; Particulate matter; pH; Temperature; Relative humidity; Formaldehyde; Acetaldehyde; Acetone; Propanal; Butanal; MEK; BAQS-Met; CalNex; California; Ontario; DNPH; HPLC; Trans-boundary transport; Na+; Mass spectrum; Chlorine; Nitryl chloride; Anthropogenic; Biogenic; Primary; Secondary; Pollutant; Aerosol mass spectrometer; Diurnal; HCHO/NO2; Ozone sensitivity; VOC; OVOC; Sea sweep

11 more images…

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Nuaaman, I. M. (2015). Investigation of Air Pollutants Near the Great Lakes in Ontario and Along the Coast of California. (Doctoral Dissertation). York University. Retrieved from http://hdl.handle.net/10315/30094

Chicago Manual of Style (16^th Edition):

Nuaaman, Ibraheem M. “Investigation of Air Pollutants Near the Great Lakes in Ontario and Along the Coast of California.” 2015. Doctoral Dissertation, York University. Accessed March 02, 2021. http://hdl.handle.net/10315/30094.

MLA Handbook (7^th Edition):

Nuaaman, Ibraheem M. “Investigation of Air Pollutants Near the Great Lakes in Ontario and Along the Coast of California.” 2015. Web. 02 Mar 2021.

Vancouver:

Nuaaman IM. Investigation of Air Pollutants Near the Great Lakes in Ontario and Along the Coast of California. [Internet] [Doctoral dissertation]. York University; 2015. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10315/30094.

Council of Science Editors:

Nuaaman IM. Investigation of Air Pollutants Near the Great Lakes in Ontario and Along the Coast of California. [Doctoral Dissertation]. York University; 2015. Available from: http://hdl.handle.net/10315/30094

21. Markovic, Milos. Measurements of Water-soluble Composition of Fine Atmospheric Particulate Matter (PM2.5) and Associated Precursor Gases via Ambient Ion Monitor-ion Chromatography (AIM-IC).

Degree: 2012, University of Toronto

URL: http://hdl.handle.net/1807/32764

►

Atmospheric fine particulate matter (PM2.5), which is mostly formed in the atmosphere from precursor gases, contributes to numerous environmental and health concerns. Quantifying the ambient… (more)

▼

Atmospheric fine particulate matter (PM2.5), which is mostly formed in the atmosphere from precursor gases, contributes to numerous environmental and health concerns. Quantifying the ambient concentrations of PM2.5 and precursor gases can be challenging. Hence, many scientific questions about the formation, chemical composition, and gas/particle partitioning of PM2.5 remain unanswered. Ambient Ion Monitor - Ion Chromatography (AIM-IC) was characterized and utilized to measure the water-soluble composition of PM2.5 (dominated by pNH4+, pSO42-, and pNO3-) and associated precursor gases (dominated by NH3(g), SO2(g), and HNO3(g)) during two field campaigns. The AIM-IC detection limits for hourly sampling were determined to be 3 - 45 ng m-3. The response time for “sticky” gases was significantly improved with a nylon denuder membrane. A novel inlet configuration for the AIM-IC, which minimizes sampling inlet losses and carryover in sample analyses, was implemented. Measurements from the BAQS-Met 2007 campaign were utilized to assess the accuracy of the AURAMS model and investigate gas/particle partitioning in SW Ontario. Due to high sulphate levels, NH3(g) was the limiting chemical factor in the formation and gas/particle partitioning of PM2.5. The errors in the predictions of relative humidity and free ammonia were responsible for the poor agreement iii between modelled and measured pNO3- values. The AIM-IC measurements from the CalNex 2010 study were compared to the CMAQ model and utilized to investigate the gas/particle partitioning in Bakersfield, CA. Very high NH3(g) concentrations were observed, and the formation and partitioning of PM2.5 was limited by HNO3(g) and H2SO4. Evidence of rapid removal of HNO3(g) by interactions with super-micron dust particles, and possibly with the alkaline surface was found. CMAQ exhibited significant biases in the predicted concentrations of pSO42-, NH3(g) and HNO3(g).

PhD

Advisors/Committee Members: Murphy, Jennifer, Chemistry.

Subjects/Keywords: Atmospheric chemistry; Environmental chemistry; AIM-IC; AIM9000D; Ambient Ion Monitor; Gas/Particle partitioning; AMS; Aerosol Mass Spectrometer; BAQS-Met 2007; CalNex 2010; Atmospheric trace gases; Atmospheric aerosol; Atmospheric particulate matter; PM1; PM2.5; Air pollution; Atmospheric measurements; Ambient measurements; Ambient monitoring; Field measurements; Instrument optimization

…pressure liquid chromatograph, a gas chromatograph, a mass spectrometer, an infrared spectrometer… …aerosol mass. In the original configuration, PILS-IC 12 13 was capable of providing 4.3 min… …inorganic PM1 mass loadings at the ground and aloft during BAQS-Met 2007… …58 Table 2.2. Comparison of measured pNO3- mass loading with offline model runs using… …70 Table 3.1. Statistical evaluation of particulate pNH4+, pSO42-, and pNO3 - mass…

10 more images…

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Markovic, M. (2012). Measurements of Water-soluble Composition of Fine Atmospheric Particulate Matter (PM2.5) and Associated Precursor Gases via Ambient Ion Monitor-ion Chromatography (AIM-IC). (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/32764

Chicago Manual of Style (16^th Edition):

Markovic, Milos. “Measurements of Water-soluble Composition of Fine Atmospheric Particulate Matter (PM2.5) and Associated Precursor Gases via Ambient Ion Monitor-ion Chromatography (AIM-IC).” 2012. Doctoral Dissertation, University of Toronto. Accessed March 02, 2021. http://hdl.handle.net/1807/32764.

MLA Handbook (7^th Edition):

Markovic, Milos. “Measurements of Water-soluble Composition of Fine Atmospheric Particulate Matter (PM2.5) and Associated Precursor Gases via Ambient Ion Monitor-ion Chromatography (AIM-IC).” 2012. Web. 02 Mar 2021.

Vancouver:

Markovic M. Measurements of Water-soluble Composition of Fine Atmospheric Particulate Matter (PM2.5) and Associated Precursor Gases via Ambient Ion Monitor-ion Chromatography (AIM-IC). [Internet] [Doctoral dissertation]. University of Toronto; 2012. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1807/32764.

Council of Science Editors:

Markovic M. Measurements of Water-soluble Composition of Fine Atmospheric Particulate Matter (PM2.5) and Associated Precursor Gases via Ambient Ion Monitor-ion Chromatography (AIM-IC). [Doctoral Dissertation]. University of Toronto; 2012. Available from: http://hdl.handle.net/1807/32764

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations