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Dissertations / Theses on the topic 'Secondary pollution'

Author: Grafiati
Published: 25 May 2024
Last updated: 31 July 2025

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1

Meyer, Ben Anton. "An examination of pollution awareness and prevention in Montana secondary agricultural education programs." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/meyer/MeyerB0807.pdf.

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2

Baek, Jaemeen. "Improving aerosol simulations: assessing and improving emissions and secondary organic aerosol formation in air quality modeling." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37249.

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Both long-term and short-term exposure to fine particulate matter (PM2.5) has been shown to increase the rate of respiratory and cardiovascular illness, premature death, and hospital admissions from respiratory causes. It is important to understand what contributes to ambient PM2.5 level to establish effective regulation, and air quality model can provide guidance based on the best scientific understanding available. However, PM2.5 simulations in air quality models have often found performance less than desirable, particularly for organic carbon levels. Here, some of major shortcomings of curr
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3

Wang, Hong. "Field and laboratory investigation of ozone-indoor surface reactions: secondary emissions inventory and implications for indoor air quality." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.mst.edu/thesis/pdf/Wang_09007dcc8044137b.pdf.

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Thesis (Ph. D.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed February 6, 2008) Includes bibliographical references (p. 140-144).
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4

Hennigan, Christopher James. "Properties of secondary organic aerosol in the ambient atmosphere sources, formation, and partitioning /." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26598.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Weber, Rodney; Committee Co-Chair: Bergin, Michael; Committee Member: Mulholland, James; Committee Member: Nenes, Athanasios; Committee Member: Russell, Armistead. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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5

Morgan, William Thomas. "Pollution aerosol across Northern Europe : assessing properties, processes and effects on regional climate." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/pollution-aerosol-across-northern-europe-assessing-properties-processes-and-effects-on-regional-climate(8c347b7e-baa9-4430-af93-911ad77eef7d).html.

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Atmospheric aerosols are the major component in the shorter-term variability governing the radiative balance of the climate system, particularly on regional scales. However, knowledge of the myriad of properties and processes associated with aerosols is often limited, which results in major uncertainties when assessing their climate effects. One such aspect is the chemical make-up of the atmospheric aerosol burden.Airborne measurements of aerosol properties across Northern Europe are presented here in order to facilitate constraint of the properties, processes and effects of aerosols in this h
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6

Moolman, Tiani. "Environmental reasoning of secondary-level schoolchildren : case study of Okahandja, Namibia." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/98100.

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Thesis (MA)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Okahandja has been identified as one of the ‘dirtiest towns’ in Namibia. The town’s location makes it an important node serving as a gateway to the leisure and tourism periphery in Namibia. However, environmental problems such as littering and the burning of household waste are threatening the local cultural and nature-based tourism industry and the aesthetic beauty of the town. These forms of pollution pose various health risks to people living in the area, to those who interact with the spaces as well as for grazing animals and
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7

Couvidat, Florian. "Modélisation des particules organiques dans l'atmosphère." Phd thesis, Université Paris-Est, 2012. http://pastel.archives-ouvertes.fr/pastel-00778086.

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La formation des aérosols organiques dans l'atmosphère est étudiée via le développement d'un nouveau modèle de formation d'aérosols organiques secondaires nommé H²O (Hydrohilic/Hydrophobic Organics). Dans un premier temps, une paramétrisation de la formation d'aérosols via l'oxydation de l'isoprène est développée. Cette paramétrisation prend notamment en compte l'influence des concentrations d'oxydes d'azote sur la formation d'aérosols et leurs propriétés hydrophiles. Ensuite, H²O incluant cette paramétrisation et d'autres développements est évalué par comparaison aux mesures de carbone organi
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8

Lannuque, Victor. "Formation de l’aérosol organique secondaire dans les modèles de qualité de l’air : développement d’une paramétrisation sur la base de simulations explicites." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1129.

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L’oxydation gazeuse des composés organiques émis dans l’atmosphère mène à la formation de milliers de composés organiques secondaires (COS). Une fraction de ces COS est peu volatile, et peut se partager entre la phase gazeuse et la phase particulaire formant ainsi des aérosols organiques secondaires (AOS). Les AOS contribuent majoritairement à la composition des particules, participant entre 20 et 80 % à la masse totale des aérosols fins et influencent ainsi leurs impacts sur l’environnement, en particulier sur la qualité de l’air et le climat. Ces impacts sont quantifiés à l’aide de modèles d
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9

Simon, Leïla. "Détermination des sources de composés organiques (gazeux et particulaires) en Ile-de-France." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASJ011.

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Afin d'approfondir les connaissances sur la qualité de l'air et la chimie atmosphérique en Ile-de-France, il est nécessaire de documenter la nature et la variabilité des polluants atmosphériques sur le long terme. La station péri-urbaine du SIRTA (intégrée à l'infrastructure de recherche européenne ACTRIS) héberge des instruments de mesure permettant le suivi en continu des propriétés physico-chimiques des particules en suspension et de certains gaz réactifs inorganiques depuis une dizaine d'années. Des questions restent néanmoins encore ouvertes sur les origines de l'aérosol organique seconda
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10

Haider, Kawssar Mujtaba. "Role of the organic waste products reactivity in secondary organic aerosol formation." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR068.

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Le recyclage des produits résiduels organiques (PRO) en tant qu'engrais agricoles se développe aujourd'hui comme une approche plus durable et plus écologique par rapport aux méthodes traditionnelles d'élimination des déchets. Cependant, l'épandage des déchets organiques pourrait libérer divers polluants tels que des composés organiques volatils (COV). Ces derniers présentent des effets néfastes sur l'écosystème et la santé humaine liés à la production d'ozone et peuvent servir comme précurseurs critiques d'aérosols organiques secondaires (AOS) dans l'atmosphère. La mesure des COV émis par les
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11

Lamkaddam, Houssni. "Etude en atmosphère simulée de la formation d'Aérosol Organique Secondaire issue de la photooxydation du n-dodécane : impact des paramètres environnementaux." Thesis, Paris Est, 2017. http://www.theses.fr/2017PESC1128/document.

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L’aérosol organique secondaire (AOS), fraction majoritaire de l’aérosol submicronique, joue un rôle important sur la santé, l’environnement et le climat. L’évaluation de son impact constitue un véritable enjeu pour la communauté scientifique. Toutefois, nos connaissances actuelles sur les processus de formation d’AOS et sa composition chimique sont encore très lacunaires, et en l’occurrence, limitent le développement des modèles atmosphériques permettant de quantifier les impacts des AOS sur la qualité de l’air et le système climatique. Ainsi, l’objectif de ce travail est de produire un ensemb
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12

Zhang, Zhenhua. "Plant growth and nutrient removal in simulated secondary-treated municipal wastewater in wetland microcosmos." University of Western Australia. School of Earth and Geographical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0141.

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[Truncated abstract] The use of constructed wetlands for tertiary purification of municipal wastewater has received increasing attention around the world because direct discharge of secondary-treated municipal wastewater to water bodies has caused eutrophication. Plant species selection and vegetation management may enhance nutrient removal efficiency in constructed wetlands. However, there is a lack of knowledge on the relations between plant growth and nutrient removal efficiency in constructed wetlands. The objective of this study is to better understand how plant growth and resource alloca
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13

Roskamp, Melissa Jordan. "Characterization of Secondary Organic Aerosol Precursors Using Two-Dimensional Gas Chromatography with Time of Flight Mass Spectrometry (GC×GC/TOFMS)." PDXScholar, 2013. https://pdxscholar.library.pdx.edu/open_access_etds/1411.

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The oxidation of volatile organic compounds (VOCs) plays a role in both regional and global air quality through the formation of secondary organic aerosols (SOA). More than 1000TgC/yr of non-methane VOCs are emitted from biogenic sources (significantly greater than from anthropogenic sources). Despite this magnitude and potential importance for air quality, the body of knowledge around the identities, quantities and oxidation processes of these compounds is still incomplete (e.g., Goldstein & Galbally, 2007; Robinson et al., 2009). Two-dimensional gas chromatography paired with time-of-flight
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14

McDonald, Ewan W. "Spatial-temporal analysis of endocrine disruptor pollution, neighbourhood stress, maternal age and related factors as potential determinants of birth sex ratio in Scotland." Thesis, University of Stirling, 2013. http://hdl.handle.net/1893/16044.

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Background: The human secondary sex ratio has been the subject of long-standing medical, environmental and social scientific curiosity and research. A decline in male birth proportion in some industrialised countries is linked to endocrine disruption and is validated by some empirical studies. Increasing parental age and population stress and associated decreases in sex ratio have also been demonstrated. A thorough literature review of 123 relevant and diverse studies provides context for these assessments. Methods: A spatial-temporal investigation of birth sex ratio in Scotland and potential
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15

Martinez, Alvaro. "Contribution des composés organiques volatils (COVs) provenant des émissions des véhicules aux aérosols organiques secondaires (AOS) et à la pollution urbaine." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1041.

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Le secteur des transports est fondamental pour le développement économique d'un pays et pour assurer la communication et une bonne qualité de vie. Cependant, le transport routier conduit à une grave dégradation de la qualité de l'air et contribue au réchauffement de la planète. Parmi tous les polluants, les particules fines et ultrafines, émises par les véhicules mais également formées dans l'atmosphère sont considérées toxiques. De nombreuses études montrent que l’exposition chronique aux particules fines favorise le développement de pathologies respiratoires et cardiovasculaires. Les précurs
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16

Varol, Murat. "Combustion And Co-combustion Of Olive Cake And Coal In A Fluidized Bed." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607182/index.pdf.

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In this study, combustion performances and emission characteristics of olive cake and olive cake+coal mixture are investigated in a bubbling fluidized bed of 102 mm inside diameter and 900 mm height. The average particle sizes of coal and olive cake used in the experiments were 1.57 mm and 1.52 mm, respectively. Flue gas concentrations of O2, CO, SO2, NOx, and total hydrocarbons (CmHn) were measured during combustion experiments. Operational parameters (excess air ratio, secondary air injection) were changed and variation of pollutant concentrations and combustion efficiency with these operati
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17

Cropper, Paul Michael. "Determination of Fine Particulate Matter Composition and Development of the Organic Aerosol Monitor." Thesis, Brigham Young University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10107987.

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<p>Tropospheric fine particulate matter (PM) poses serious health risks and has a significant impact on global climate change. The measurement of various aspects of PM is challenging due to its complex chemical nature. This dissertation addresses various aspects of PM, including composition, measurement, and visibility. The U.S. Environmental Protection Agency (EPA) proposed a new secondary standard based on visibility in urban areas using 24-h averaged measurements of either light scatter or PM concentration. However shorter averaging times may better represent human perception of visibility.
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18

Varughese, Jincy. "Environmental Inequities in U.S. Public Schooling." Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/cmc_theses/1416.

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Several studies and local accounts have documented elevated levels of air pollution and toxics on or near US public schools. The low cost of brownfield lands and lands near major sources of air pollution have made siting schools on these areas enticing. Histories of using toxic chemicals in building materials explain their presence in school environments. The impacts to academic achievement associated with air pollution and exposure to lead as well as the health implications of regular, high exposure to air pollution and toxic chemicals necessitate policy changes. In this paper, the extent of
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19

Prill, Nadine. "Effects of environmental change on plant performance and plant-herbivore interactions." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:c58761e9-666c-4b7d-a78a-d70de7f253d4.

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Global environmental change fundamentally affects plants and their interactions with other species, and this has profound impacts on communities and ultimately ecosystems. In order to understand the mechanisms involved, we need to elaborate on the combined effects of different global change drivers on multiple levels of plant organization, including the biochemical level (production of defence compounds), the whole organism, the population, and the plant-herbivore interaction level. This thesis investigates (1) the combined effects of factors related to climate change and habitat fragmentation
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20

Pushpawela, Buddhi G. "The formation and characteristics of new particles in the atmosphere." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/122854/2/__qut.edu.au_Documents_StaffHome_StaffGroupH%24_halla_Desktop_Buddhi_Pushpawela_Thesis.pdf.

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Airborne particles play a major role in climate change and human health. Drawing on the results of extensive measurements carried out in the relatively clean environment of Brisbane and the heavily polluted megacity of Beijing, this thesis has significantly furthered our knowledge of the physical mechanisms of new particle formation in the lower atmosphere. Several characteristics of new particle formation events, such as their temporal distribution, the effect of wind speed and the role of atmospheric ions on the particle formation rate, were investigated for the very first time.
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21

Pachon, Quinche Jorge Eduardo. "Development and assessment of environmental indicators for mobile source impacts on emissions, air quality, exposure and health outcomes." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42719.

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Environmental indicators were developed and evaluated to assess the impact of mobile sources on emissions, air quality, exposure and health. Different levels of indicators are discussed, from single species to multipollutant indicators. Carbon monoxide (CO), Nitrogen oxides (NOx) and elemental carbon (EC) were chosen as indicators of mobile sources because emissions of these pollutants are largely attributed to mobile sources and ambient concentrations have a close response to the change in mobile source emissions. These pollutants were used in the construction of the integrated mobile source
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22

Brown, Reece. "Development and deployment of novel instrumentation for the real-time monitoring of atmospheric PM-bound ROS." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/200736/1/Reece_Brown_Thesis.pdf.

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This thesis details the development and deployment of a novel instrument to quantify particle-bound reactive oxygen species (ROS) in the atmosphere. ROS are significant as they are believed to be one of the underlying mechanisms explaining the link between air pollution exposure and a variety of cardiovascular, respiratory, and neurological diseases. The time resolution, sensitivity and stability of the instrument are higher than any comparable system in literature. In field trials this has allowed first the first ever observations of short-lived ROS species in an atmospheric environment, whic
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23

Hill, Martin. "Essays on environmental policy analysis : computable general equilibrium approaches applied to Sweden." Doctoral thesis, Stockholm : Economic Research Institute, Stockholm School of Economics (Ekonomiska forskningsinstitutet vid Handelshögsk.) (EFI), 2001. http://www.hhs.se/efi/summary/551.htm.

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24

Young, Dominique Emma. "Characterisation of the chemical properties and behaviour of aerosols in the urban environment." Thesis, University of Manchester, 2014. 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.

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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 aerosol
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25

Hallemans, Elise. "Étude de la formation, du vieillissement et de la composition chimique de l'aérosol organique secondaire dans le bassin méditerranéen." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1122/document.

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L’aérosol organique secondaire (AOS) est issu de processus d’oxydation des précurseurs gazeux, les composés organiques volatils (COV). Des lacunes persistent encore dans la connaissance des voies de formation et d’évolution de l’AOS et de sa composition chimique à l’échelle moléculaire. Ces différents aspects expliquent en partie la sous-estimation de sa concentration globale par les modèles. Pour apporter des éléments de réponse à ces problématiques, le bassin méditerranéen a été sélectionné comme région d’étude. Celui-ci est, en effet, caractérisé par une forte photochimie, notamment en été,
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26

Bertrand, Amélie. "Vieillissement atmosphérique de l'aérosol de combustion de biomasse : du potentiel de formation d'aérosol organique secondaire à la modification de l'empreinte chimique à l'échelle moléculaire." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0149/document.

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La combustion de bois, ou plus largement de la biomasse, est une source de pollution très importante en particules atmosphériques en hiver, particulièrement en France. Si les émissions primaires ont été étudiées depuis de nombreuses années, il existe de grandes incertitudes sur le devenir de ces émissions dans l’atmosphère. Le travail de thèse a donc porté sur l’étude du vieillissement en chambre de simulation atmosphérique de l’aérosol émis par 3 appareillages pour le chauffage au bois (conçus entre 2000 et 2010 et représentatifs de la politique de renouvellement mis en place par l’ADEME), av
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Johansson, Otilia. "Epiphytic lichen responses to nitrogen deposition." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-43751.

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Nitrogen (N) deposition has increased globally over the last 150 years and further increase is predicted for the future. Nitrogen is an important nutrient for lichens, involved in many processes in both photobiont and mycobiont.  However, N can be a stressor, causing many lichens and lichen communities to disappear with increased deposition. The objective of this thesis was to investigate the response of epiphytic lichens to increased N load. This was done by simulating an increased N deposition to lichens in a boreal forest with low background N, including both short term studies with transpl
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28

Ashwell, Alice Nicola. "Project water (Grahamstown) : a case study of the development of an environmental education project." Thesis, Rhodes University, 1992. http://hdl.handle.net/10962/d1003599.

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Environmental education is an approach to education which emphasises the interrelatedness of people and their human and non-human environments and seeks to encourage environmental awareness, concern and action. This case study documents the implementation and development of Project WATER, Grahamstown, a practical environmental education project dealing with catchment conservation and water quality monitoring. The Grahamstown project is one of a number of local water quality monitoring initiatives affiliated to GREEN (the Global Rivers Environmental Education Network). Participants in the proje
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29

Yan, Bo. "Characterization and source apportionment of ambient PM2.5 in Atlanta, Georgia: on-road emission, biomass burning and SOA impact." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37151.

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Characterization and Source Apportionment of Ambient PM2.5 in Atlanta, Georgia: On-Road Emission, Biomass Burning and SOA Impact Bo Yan 260 Pages Directed by Drs. Armistead G. Russell and Mei Zheng Various airborne PM2.5 samples were collected in the metropolitan Atlanta and surrounding areas, which are directly impacted or dominated by on-road mobile and other typical urban emissions, regional transport sources, prescribed burning plumes, wildfire plumes, as well as secondary sources with anthropogenic and biogenic nature in origin. Detailed PM2.5 chemical speciation was conducted inclu
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Kammer, Julien. "LANDEX : étude des aérosols organiques secondaires (AOS) générés par la forêt des Landes." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0402/document.

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L’objectif de ce travail de thèse est d’améliorer l’état de nos connaissances sur les processus de formation et du devenir de l’AOS, en lien avec la réactivité des COVB avec les oxydants de l’atmosphère et en particulier l’ozone, en utilisant le potentiel de l’écosystème landais en tant que source d'AOS biogénique. Pour cela, des campagnes de terrain ont été menées sur un site de mesure en forêt landaise, écosystème particulièrement approprié pour l’étude de la formation et du devenir des AOS. Au cours de ces campagnes, différents paramètres physico-chimiques complémentaires ont été mesurés, t
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Guilbaud, Sarah. "Etude du vieillissement des aérosols inorganiques industriels en milieu urbain." Thesis, Littoral, 2018. http://www.theses.fr/2018DUNK0524/document.

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Lors de leur séjour dans l’atmosphère, les aérosols sont soumis, entre autres, à des processus d’agrégation, ainsi que de condensation sur leurs surfaces. Ces processus, dit de vieillissement, dépendent du temps de résidence des particules dans l’atmosphère, des conditions météorologiques et de l’environnement chimique rencontré. Cette étude vise à caractériser l’aérosol inorganique et étudier son évolution physico-chimique sur quelques dizaines de milliers de mètres, dans les panaches industriels et urbains où les concentrations atmosphériques en particules fines (PM₁₀) sont relativement élev
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Dubois, Diane. "Réalisation et caractérisation d'un réacteur plasma de laboratoire pour des études sur la dépollution des gaz d"échappement." Toulouse 3, 2006. http://www.theses.fr/2006TOU30139.

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Cette thèse concerne l’étude expérimentale des décharges couronne positives à la pression atmosphérique générées dans un réacteur de laboratoire de type pointe – plan alimenté en régime de tension continue et pulsée. La nature et les caractéristiques de la décharge couronne, notamment dans son régime de « breakdown streamer », sont étudiées en fonction du régime et de l’amplitude de l’alimentation de tension, du rayon de courbure de la pointe, de la distance inter – électrodes ou encore de la composition du mélange gazeux en faisant varier les proportions de N2, de O2 et de CO2. La dynamique e
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Petit, Marie-Eléonore. "Pérennité, fonctionnalité, efficacité d'une zone humide artificielle (ZHA) en milieu méditerranéen : un nouvel écosystème au service du traitement secondaire des effluents industriels." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0439/document.

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Les zones humides naturelles méditerranéennes sont des écosystèmes rares et vulnérables souvent altérés par les pollutions des milieux adjacents. Le développement de zones humides artificielles (ZHA) servant au traitement secondaire des pollutions permettrait de limiter l’impact des activités industrielles sur les milieux naturels. Pour végétaliser ces ZHA et tolérer les contraintes du climat méditerranéen, l’utilisation d’espèces végétales locales éco-adaptées est recommandée. Toutefois ce type de ZHA, utilisant des plantes locales méditerranéennes, a fait l’objet d’un nombre restreint de tra
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Jacob, Florence. "Génération contrôlée et détermination de l'impact toxicologique des aérosols organiques secondaires." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILS078.

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L'exposition chronique aux particules atmosphériques d’un diamètre inférieur à 2,5 μm (PM2,5) à des concentrations supérieures au niveau recommandé par l'organisation mondiale de la santé est à l’origine de la survenue et/ou l’aggravation de pathologies respiratoires, cardiovasculaires, neurologiques, voire de cancers. Des valeurs seuils réglementaires ont été définies concernant la concentration massique ambiante des PM2,5. Cependant, ces valeurs ne tiennent pas compte de l’impact des variations de la composition chimique des particules sur les effets biologiques induits. Une attention partic
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El, Haddad Imad. "Fraction primaire et secondaire de l'aérosol organique : méthodologies et application à un environnement urbain méditerranéen, Marseille." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10029.

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La mise en place de politiques efficaces visant à la réduction des niveaux de concentrations en PM exige la connaissance préalable des sources primaires et secondaires de l’aérosol organique, une fraction majoritaire des PM demeurant encore mal appréhendée. Les travaux réalisés au cours de cette thèse s’inscrivent dans le cadre du projet FORMES qui avait pour principal objectif d’évaluer et de contraindre les principales méthodes de quantification de l’influence des différentes sources de la fraction organique de l’aérosol en milieu récepteur et d’en optimiser les procédures. La caractérisatio
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Pouyes, Pauline. "Etude de l'aérosol organique secondaire d'origine biogénique : caractérisation de marqueurs moléculaires et étude de leur réactivité hétérogène d'intérêt atmosphérique." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0471.

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Parmi les principaux enjeux environnementaux, la problématique des aérosols atmosphériques secondaires, dont on ne peut réguler les émissions, fait l’objet de toutes les attentions depuis plusieurs années de par leurs impacts sur le changement climatique et la qualité de l’air. Ce travail a eu pour objectif d’étudier les principaux traceurs d’aérosols organiques secondaires (AOS) issus de l’oxydation de terpènes émis par la végétation. Deux aspects complémentaires ont été étudiés expérimentalement sur le terrain et en laboratoire. Un premier a consisté en la caractérisation chimique à l’échell
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Michel, Christelle. "L'aérosol de combustion dans une région en grande mutation, l'Asie." Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00069797.

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Une source majeure d'incertitude dans l'estimation de l'impact climatique des aérosols est directement liée à notre connaissance des émissions gazeuses et particulaires. Ceci est particulièrement vrai en Asie, où une forte empreinte régionale est observée, avec différents types d'émissions, dépendant de la grande hétérogénéité de végétations et climats (émissions de feux de biomasse) et de l'évolution rapide de la population, de l'urbanisation et de l'industrialisation (émissions de fuels fossiles et de biofuels). <br />Mon travail de thèse a eu pour but, tout d'abord, de développer un inventa
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Chen, Chi-Yan, and 陳奇言. "A Study of Vehicle Exhaust Pollution by Adding Secondary Air." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/az6t2k.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>102<br>The objective of this paper is to explore the best way of reducing pollution from the automobile exhaust. In order to find out the best way, the writer of this paper tries to do two types of experiments. The first one is to add catalytic converter and four different quantities of secondary air into gasoline engine exhaust manifold, and to cover it with thermal insulation material, and the second one is to add four different quantities of secondary air into diesel engine exhaust manifold, and spray it with water. According to the numerical values of doing
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Chun-Hsien, Shih, and 施純賢. "Secondary Pollution by Volatile Organic Compounds in Wastewater Treatment Plant of Petrochemical Industry." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/14956952668176205636.

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碩士<br>國立高雄海洋科技大學<br>海洋環境工程研究所<br>101<br>The wastewater of wastewater treatment plants in petrochemical industry contains large quantity of VOCs (Volatile Organic Compounds), and the domestic regulatory standards of VOCs for the industry in early years was less developed; therefore, wastewater without proper treatment was wantonly discharged, causing pollution problems came out one after the other, coupled with volatile characteristics of such pollution substances, so a superior emission condition was formed under the high perturbation of treatment process. Therefore, wastewater treatment plant
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Yao, Yi-Ling, and 姚御凌. "A Study on the effect of secondary air in motorcycle to the exhaust pollution and catalytic converter." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/keny26.

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碩士<br>崑山科技大學<br>機械工程研究所<br>97<br>This paper is mainly to discuss the effect of secondary air in motorcycles to the exhaust pollution and catalytic converter during the engine warm-up period. We measured the exhaust emissions and catalytic converter’s temperature during engine warm-up and the idle/high engine speed. Under the warm-up transient condition, the engine and catalytic converter are both not reach the working temperature. The pollution during this period is heavy. So in this experiment, we controlled different flows of high-pressure’s secondary air into the exhaust pipe to make exhaus
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Yun-Jui and 吳昀叡. "Secondary aerosols with hourly measurements of air pollution events in Taichung the association with the atmospheric transmission." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/43378954914854813751.

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Wichmann, Janine. "Probing secondary exposure and health data as a tool to improve public health in South Africa." Thesis, 2005. http://hdl.handle.net/2263/29941.

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The usefulness of secondary exposure and health data to improve public health in South Africa will be assessed. Given the tremendous health impact of air pollution exposure the focus of this thesis is on primary prevention, that is the identification of outdoor air pollution and the use of dirty fuels (wood, animal dung, crop residues, coal, paraffin) for cooking and heating as risk factors, whilst controlling for confounding. Hourly averaged outdoor PM10 mass, NO2, NO, SO2, O3 data (1 August 1998 - 31 July 2003) from Cape Town were analysed in a nonparametric Spearman’s Rho correlation analys
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Τσιμπίδη, Αλεξάνδρα. "Simulating the atmospheric primary and secondary organic aerosols." Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2402.

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Until recently, organic particulate material was simply classified as either primary or secondary with the primary component being treated in models as nonvolatile and inert. This framework is used to simulate the organic aerosol formation, growth and composition in the eastern United States during the four seasons of the year. The model predictions are evaluated against daily average PM2.5 (particulate matter smaller than 2.5 μm) measurements taken throughout the eastern United States by the Interagency Monitoring of Protected Visual Environments (IMPROVE) and the Speciation Trends Network (S
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Liu, Yang. "Comparative analysis of Unmix/PMF modeling for PM₂.₅ source apportionment in rural and urban Kansas and a review of life cycle assessment on carbon footprint of beef production." Diss., 2018. http://hdl.handle.net/2097/39285.

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Doctor of Philosophy<br>Department of Biological & Agricultural Engineering<br>Zifei Liu<br>The Unmix and Positive Matrix Factorization (PMF) models for source apportionment were applied to evaluate prescribed burning impacts on air quality, identify model advantages, and establish a relationship between visibility and PM₂.₅ sources. Speciated PM₂.₅ data were from the Flint Hills (FH) rural and the Kansas City (KC) urban sites. At the FH site, the Unmix model identified five sources: nitrate/agricultural, sulfate/industrial, crustal/soil, smoke, and secondary organic aerosol (SOA); while the P
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Olufemi, A. C. "Investigates the levels of awareness, knowledge and attitude of South African secondary school learners and educators about environmental pollution in a coal mining area." 2013. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001338.

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Ashford, Nicholas. "The Encouragement of Technological Change for Preventing Chemical Accidents: Moving Firms from Secondary Prevention and Mitigation to Primary Prevention." 1993. http://hdl.handle.net/1721.1/1561.

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Παπασάββας, Άγγελος. "Βελτιστοποίηση των φυσικών αντιοξειδωτικών παραγόντων των φυτών μέσω του ελέγχου των θρεπτικών συστατικών". Thesis, 2014. http://hdl.handle.net/10889/8564.

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Η ρύπανση από τα χημικά λιπάσματα είναι έντονη στα ελληνικά εδάφη (ιδιαίτερα από τα νιτρικά άλατα) και επομένως είναι κρίσιμη η μείωση των εισροών αγροχημικών στο περιβάλλον. Η μείωση της λίπανσης αυξάνει την συγκέντρωση αντιοξειδωτικών ουσιών στους φυτικούς ιστούς. Πολλές επιστημονικές μελέτες μέχρι σήμερα συσχετίζουν την διατροφή με φυτικά προϊόντα υψηλής διατροφικής αξίας που περιέχουν φαινολικές-αντιοξειδωτικές ουσίες με την πρόληψη καρδιαγγειακών παθήσεων, πολλών μορφών καρκίνου αλλά και την γήρανση. Έτσι η έρευνα αυτή είχε διπλό στόχο: τη μείωση της ρύπανσης του περιβάλλοντος μέσω τη
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Κωστενίδου, Ευαγγελία. "Usage of aerosol mass spectrometry for the measurement of the physical and chemical properties of the atmospheric nanoparticles." Thesis, 2010. http://nemertes.lis.upatras.gr/jspui/handle/10889/3343.

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The Aerosol Mass Spectroscopy (AMS) is a recently developed method that provides on-line measurements of the chemical composition, mass spectrum and mass distributions of the atmospheric aerosol. Using the AMS with a thermodenuder in smog chamber experiments of ozonolysis of α-pinene, β-pinene and limonene, the mass spectrum of the secondary organic aerosols (SOA) is deconvoluted in low, medium and high volatility mass spectra. The spectrum of the surrogate component with the lower volatility for α-pinene and β-pinene is quite similar to that of ambient oxygenated organic aerosol (OOA). This c
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