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Dissertations / Theses on the topic 'Pollution levels'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Menya, Emmanuel. "Assessment of Pollution Levels Resulting from Biomass Gasification." Thesis, KTH, Kraft- och värmeteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101404.

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Today the large scale introduction of biomass gasification is hampered by health, safety and environmental issues which present a major barrier in the deployment of this technology. The condensate in particular resulting from producer gas cooling before use in gas engines is highly toxic and carcinogenic which, if not adequately controlled, can lead to detrimental impacts on human health and the environment. The study was therefore aimed at assessment of pollution levels resulting from biomass gasification organic condensates. The study involved assessing the concentration of polycyclic aromat

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2

Adams, Helen Sarah. "Exposure assessment of urban transport users to particulate air pollution." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246812.

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3

Betton, Catherine. "Nitrate-N levels in British streams and rivers : a countrywide perspective." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277094.

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4

Muindi, Kanyiva. "Air pollution in Nairobi slums : sources, levels and lay perceptions." Doctoral thesis, Umeå universitet, Epidemiologi och global hälsa, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-138293.

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Background Air quality in Africa has remained a relatively under-researched field. Most of the African population is dependent on biomass for cooking and heating, with most of the combustion happening in low efficiency stoves in unvented kitchens. The resulting high emissions are compounded by ingress from poor outdoor air in a context of poor emissions controls. The situation is dire in slum households where homes are crowded and space is limited, pushing households to cook in the same room that is used for sleeping. This study assessed the levels of particulate matter with aerodynamic diamet

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5

Boddy, Rachel E. "A study of spatial and temporal variations in pollutant levels." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287231.

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6

Li, Bing. "The relationship between asthma and pollution levels in Prince George, British Columbia." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27582.

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Three methods are used to analyse the relationships between asthma and pollution levels in Prince George. The first is the spectral analysis approach, which concentrates on the spectra of the pollusion level series and the asthma counts series, their cross spectra, their coherency, and a measure of the linear relationship between them. The other two methods are what we term the "generalized harmonic process" and the "generalized autoregressive approach", which generalize the traditional harmonic process and autoregressive model and allow us to analyse time series with less restricted distribut

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7

Shirley, Mark David Foster. "The effect of metapopulation structure on evolutionary responses to cadmium pollution in Drosophila melanogaster." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320087.

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8

Pathak, Khanindra. "Modelling and prediction of environmental noise levels near mechanised surface mines and quarries." Thesis, Imperial College London, 1996. http://hdl.handle.net/10044/1/8776.

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9

Dick, A. L. "Trace elements in Antarctic snow and air." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376538.

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10

Mills, David Kevin. "Productivity and distribution of benthic microalgae in the Forth estuary." Thesis, Heriot-Watt University, 1985. http://hdl.handle.net/10399/1649.

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11

Maphuhla, N. G. "Determination of physiochemical properties and metal levels in soil, water, and plant from Alice landfill site." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/6224.

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The state of soil is of great significance because it is a common medium for plant growth, which provides important nutrients to plants. Water pollution is the build-up of harmful substances in water bodies to the level that results in health problems for people and animals. Heavy metal pollution (of soil, water, and plants) and their health effects on people is a persistent social issue, and several types of research have recognized health risks of residents living close to open dumpsites. Dump sites are sources of heavy metal impurity and toxicity to the surrounding environment. Analyses wer

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12

Canty, Martin Neil. "Marine pollution and echinoderms : a biomarker study integrating different levels of biological organisation." Thesis, University of Plymouth, 2009. http://hdl.handle.net/10026.1/1310.

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There is growing concern that the invertebrate test organisms commonly employed in the field of aquatic ecotoxicology may not be sufficient to accurately screen for the possible deleterious effects of contaminants discharged into the marine environment. The use of echinoderms has been proposed to redress this problem, due to their ecological importance and their evolutionary closeness to the chordates. But to date, there is a paucity of data in the published literature which has utilised the adult stages of echinoderms in laboratory based toxicology studies. The present studies aimed to fill t

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13

Ma, Kit-cheong James. "Hong Kong Government criteria for assessing contamination levels of dredged marine sediments /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22264474.

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14

Brooks, J. Mark. "Predictors of indoor dust mite and cockroach levels." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. http://www.mhsl.uab.edu/dt/2007p/brooks.pdf.

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15

Al-Mutawa, Ayesha Ibrahim. "The influence of the meteorological conditions on air pollution levels in Emirate of Dubai, United Arab Emirates." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366431.

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16

Linaritakis, Konstantinos N. "Factors affecting traffic-related air pollutant levels in urban streets." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47154.

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17

Choi, Ching-yee. "Noise levels in primary school classrooms in Hong Kong audiological implications /." Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B36207846.

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Thesis (B.Sc)--University of Hong Kong, 2001.<br>"A dissertation submitted in partial fulfilment of the requirements for the Bachelor of Science (Speech and Hearing Sciences), The University of Hong Kong, May 4, 2001." Also available in print.

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18

Kirk, Randall P. "The impact of residential wood combustion on indoor particulate matter levels." Virtual Press, 1988. http://liblink.bsu.edu/uhtbin/catkey/539632.

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This study concentrates on indoor air pollution, specifically particulate matter, as a result of woodburning in the home. Three single-family residences in Richmond, Indiana, equipped with identical airtight woodburning stoves and using a controlled wood supply, were monitored for a 49-day period in 1987. Particluate matter samples were collected during periods of active wood combustion and periods absent of wood combustion using low-volume samplers. Significant differences were found in two of the three houses when wood combustion and non-wood combustion periods were compared. No relationship

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19

Simbi, Joseph. "Levels of selected gaseous pollutants in ambient air in the vicinity of a chemical industry, Kwekwe, Zimbabwe." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2015.

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Thesis (MTech (Environmental Management))--Cape Peninsula University of Technology, 2015.<br>The integrity of natural air has been compromised due to the deposition of chemical, biological and particulate substances from natural and anthropogenic sources. Adverse health consequences arising from the exposure of plants, animals and human to elevated atmospheric concentrations have been reported severally. The ambient baseline levels of many air contaminants in urban and industrial layouts of many Africa cities, especially Zimbabwe have not been fully characterized. Information on levels of thes

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20

Cobb, John. "Method development for the determination of low-levels of radionuclides in environmental materials." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/12408.

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21

Bastien, Charlotte. "Pesticide levels in agricultural drainage systems in Quebec." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60528.

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A study was conducted to measure pesticide concentrations from two tile-drained potato fields in Saint-Leonard d'Aston, Quebec. Soil and water samples were analysed for the pesticides metribuzin, fenvalerate and aldicarb in 1989, and for metribuzin and phorate in 1990.<br>Metribuzin concentrations up to 3.47 $ mu$g/l were detected in the tile drain water. Surface runoff samples had metribuzin concentrations up to 47.086 $ mu$g/l. Aldicarb was not detected in any of the water samples. Fenvalerate was detected in surface runoff at a level of 0.05 $ mu$g/l during the 1989 growing season. Phorate

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22

Delfino, Ralph J. (Ralph John). "The relationship of urgent hospital admissions for respiratory illnesses to air pollution levels in Montreal." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41570.

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The relationship between the number of daily hospital admissions for respiratory illnesses and ambient air pollution in Montreal, Canada, was investigated for cold and warm periods between 1983 and 1988. The comprehensive hospital discharge database of the Quebec Ministry of Health and Social Services was used to derive daily counts of hospital admissions for respiratory illnesses, and for certain non-respiratory illnesses not expected to be related to air pollution levels. The reliability of this database was assessed by reviewing 1,270 hospital discharges.<br>Routinely monitored independent

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23

Ares, Maria Elena. "The impacts of low levels of antibiotics on freshwater microbial communities." Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/8767.

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24

Hazuka, John Anthony 1964. "Evaluation of chemcassette technology for monitoring low-levels of nitrogen-dioxide." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276766.

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Problems associated with instruments used to measure low levels of NO₂ include non-specificity, low sensitivity, and an uncharacterized dependence on environmental conditions. MDA Scientific has recently introduced a continuous colorimetric tape technique (chemcassette) to monitor for pollutant gases. Advantages of this technology include ease of use, fast-response alarm capability, and adaptability to measure different pollutants. This research characterized and compared chemcassette performance for NO₂ with other low-level NO₂ monitoring technologies including the luminox LMA-3 monitor and t

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25

Elkilani, Amal Sayed. "Modelling indoor volatile organic compound (VOC) levels based on experimentally determined parameters." Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299681.

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26

Hsiao, Hui-Wen. "Verification of methodologies for estimating human exposure to high levels of mercury pollution in the environment." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/72988/.

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A considerable amount of work has been conducted developing exposure estimate models for quantitative evaluation of Hg intake and human health risks, but few have assessed the applicability and the validity for evaluating the risks posed by Hg in the environment and have achieved very mixed results. The present study focused on verifying the daily Hg intake estimates using exposure estimate models. Deterministic methods and the probabilistic methods (the Monte Carlo) were applied to simulate the daily Hg intake doses which were verified by comparing the estimates to those established from meas

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27

Lake, Bjorn Anders. "The Use of Semipermeable Membrane Devices (SPMDS) for Monitoring Dioxin Levels in Maine Rivers." Fogler Library, University of Maine, 2003. http://www.library.umaine.edu/theses/pdf/LakeBA2003.pdf.

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28

Meleady, Michael J. "Is environmental quality improving for environmental justice communities? an examination of trends in toxic pollution levels in Texas /." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2598.

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Thesis (M.S.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains vi, 67 p. : maps (part col.). Vita. Includes abstract. Includes bibliographical references (p. 53-56).

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29

Williams, Chavon R. "A National survey of Mercury levels in South Africa's water management areas." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8674_1298356510.

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<p>This study forms part of a broader project co-funded by the Water Research Commission (WRC), and CSIR Parliamentary Grant (PG) and Strategic Research Panel (SRP) research grants, aimed at surveying selected water resources within the 19 Water Management Areas in South Africa. Furthermore, it aims at determining the concentrations of Hg and MeHg in various environmental compartments collected from priority water resources, to identify the potential Hg hotspots, and to assess the degree of compliance with national and international guidelines. Mercury concentrations in the environment have in

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30

Tambasco, Giuseppe. "Methods to predict and reduce trace metal levels in lettuce grown on contaminated urban soils." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ44294.pdf.

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31

Adonis, Marta. "Urban air pollution by polycyclic aromatic hydrocarbons in Santiago, Chile : levels, DNA adducts, genotoxicity and CYP1A induction." Thesis, University of Surrey, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298153.

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32

Dahlberg, Anton. "Influences of black carbon levels in the micro-environment inside urban buses." Thesis, Stockholms universitet, Institutionen för miljövetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-194706.

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Several studies indicate that the cabin of buses is the micro-environment in urban public transport where commuters might be the most exposed to black carbon. Black carbon functions as an indicator of air pollution, which is shown to have harmful impacts on the human body and because it may lead to cancers, systemic inflammation, and cardiovascular diseases, it is listed as one of the top causes to premature deaths, globally. This makes it important to understand what mechanisms there are to the elevated levels of pollutants in urban buses, and by performing mobile in-cabin measurements of bla

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33

Barnwell, Mackenzie S. "Evaluation of Occupational Exposure to In-Bus Traffic Related Air Pollution Concentrations and Noise Levels for Bus Drivers." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1623166803096552.

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34

Joo, Jaehyun. "Policy dynamics in South Korea state responses to low wage levels and compensation for pollution victims, 1961-1988 /." Thesis, Boston Spa, U.K. : British Library Document Supply Centre, 1997. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.264980.

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35

Delgado-Rios, Marcos. "Microenvironmental air and soil monitoring of contaminants an evaluation of indoor and outdoor levels in Chihuahua City /." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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36

Salas, Massó Núria. "Epidemiology of arcobacter-related spp. In shellfish exposed to marine and brackish water with different levels of fecal pollution." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/668373.

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El gènere Arcobacter, que ha estat recentment dividit en 7 nous gèneres, comprèn espècies zoonòtiques i patògenes. Aquests gèneres han estat detectats, amb un alt percentatge de positivitat en marisc i juntament amb el fet que aquests aliments són consumits poc cuinats, suposen un risc per al consumidor. En aquesta tesi, s'ha estudiat la relació entre aquests bacteris i bivalves exposats a aigües amb diferents nivells de contaminació fecal. El desenvolupament d'una nova metodologia, que consisteix en el suplement del brou Arcobacter-CAT amb 2.5% NaCl i el seu posterior cultiu en agar marí, ha

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37

Yan, Chun-man, and 甄俊文. "The 1990 air pollution control regulation: a story of reducing the sulphur dioxide levels in ambient air in HongKong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45175019.

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38

Cruvinel, Brandao Fonseca Marinho Rayssa. "Atmospheric Pollutant Levels in Southeast Brazil During COVID-19 Lockdown: Combined Satellite and Ground-based Data Analysis." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/102026.

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With the ongoing COVID-19 pandemic being spread all over the world, lockdown measures are being implemented making air pollution levels go down in several countries. In this context, the air quality changes in the highly populated and trafficked Brazilian states of Sao Paulo (SP) and Rio de Janeiro (RJ) are hereby going to be addressed using a combination of satellite and ground-based data analysis. We explored nitrogen dioxide (NO2) and particulate matter (PM2.5) daily levels for the month of May during different years within 2015-2020. Daily measurements of NO2 column concentrations from the

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39

Zarpoush, Rahil, and Rahil Zarpoush. "Mitigating Noise Levels Within the Main Campus of University of Arizona by Integrating Biodegradable Polylactic Acid as an Acoustic Panel to Buildings." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/625326.

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People's experience of space is quite different because we experience our environment with all senses available to us. Environmental pollutions can affect everybody's experiences of space. Noise is one of the environmental pollutions that long-term exposure to high noise levels can cause sleep disruption, reduction of performance, permanent hearing loss, and the inability to enjoy the space. This research presents an assessment of noise levels on the main campus of the University of Arizona, based on noise measurements and noise maps, and defines problems associated with the high noise level

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40

Lumper, Randy N. "The relationship between el niño Southern oscillation and levels of paralytic shellfish poisoning present in Washingtons marine waters." Online pdf file accessible through the World Wide Web, 2008. http://archives.evergreen.edu/masterstheses/Accession86-10MES/Lumper_RNMESThesis2008.pdf.

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41

Hurtado, Heather Ann. "Naturally Occurring Background Levels of Arsenic in the Soils of Southwestern Oregon." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2996.

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This study examines the natural background concentrations of arsenic in the soils of southwest Oregon, using new samples in addition to data collected from previous theses (Khandoker, 1997 and Douglas, 1999). The original 213 samples were run by ICP-AES with a reporting limit of 20 ppm, and only three samples had detected values. The original samples were tested again (2013) at a lower reporting limit of 0.2 ppm by ICP-MS, as were 42 new samples (2013), to better ascertain the natural levels of arsenic in undisturbed soils. The aim is to add to the existing DEQ data set, which has been used to

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42

Ma, Kit-cheong James, and 馬傑昌. "Hong Kong Government criteria for assessing contamination levels of dredged marine sediments." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31254718.

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43

Dogan, Guray. "Determination Of Ambient Levels And Sources Of Volatile Organic Compounds In Izmir-aliaga Region." Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615633/index.pdf.

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In this study, atmospheric levels and sources of VOCs at Aliaga industrial area was investigated. For this, VOC concentrations were measured at two monitoring stations through winter and summer campaigns in 2005 and 2006. Sampling stations were located in downtown Aliaga and downwind of industrial facilities, approximately 500 m to the south east of Horozgedigi village. After the summer sampling, another temporary station was installed in between PETKIM and T&Uuml<br>PRAS, named as T&Uuml<br>PRAS Station to generate T&Uuml<br>PRAS and PETKIM profiles. More than 50 species were measured in all

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44

DiAngelo, Constance Rose. "Energy levels and anaerobic endproducts in the brains of two species of teleost fish at death in anoxic water." Thesis, Virginia Tech, 1986. http://hdl.handle.net/10919/45641.

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<p>The brain of fish, as in other vertebrates, is responsible for many functions basic to life and is also thought to be an anoxia-sensitive tissue. Therefore, during anoxia, the maintenance of energy within the brain is of paramount importance to the survival of the animal. Studies concerning energy levels and storage and the use of anaerobic metabolism in fish brains following exposure to anoxia are lacking.</p> <p> Rainbow trout (<u>Salmo gairdneri</u>) and brown bullhead catfish (<u>Ictalurus nebulosus</u>) occupy ecologically distinct habitats. Their tolerance of anoxia is diffe

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45

Djawe, Kpandja. "Effects of Environmental Exposures on: Pneumocystis jirovecii Pneumonia (PcP) Hospital Admissions; and Antibody Levels to Major Surface Glycoprotein among HIV-Infected Patients from San Francisco." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1321371095.

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46

Mdaka, Themba Cyprian. "Assessment of noise levels in work areas at the Polokwane Platinum Smelter, South Africa." Thesis, University of Limpopo, 2015. http://hdl.handle.net/10386/1296.

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Thesis (M.Sc (Physiology)) --University of Limpopo, 2015<br>Objective This study assesses whether noise levels above legal limits of 85 dB(A) that can result in noise-induced hearing loss are present in areas where employees are supposed to work and to verify that such areas are demarcated as noise zones at the Polokwane Platinum Smelter. Background and motivation Excessive noise is a global health hazard with considerable social and physiological impact, including the development of noise-induced hearing loss (NIHL). Noise is a major hazard in many workplaces. It is estimated that m

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47

Cull, Deneen Jane. "Quantitative comparison of levels of organic wastes from four major sources at four scales along the Newfoundland coastline." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0034/MQ62379.pdf.

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48

Papapreponis, Panayiotis. "Residential exposure to low levels of air pollution from municipal waste incinerators and possible subtle effects on the health status of the community." Thesis, University of Dundee, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500571.

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Albalawi, Salem Mohammad S. "Daily air pollution levels and asthma : exploring the influence of time-activity patterns on personal exposure in Al Jubail industrial city, Saudi Arabia." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3566.

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Title: Daily air pollution levels and asthma; exploring the influence of time-activity patterns on personal exposure in Al Jubail industrial city, Saudi Arabia Introduction: Air pollution is a known risk factor for adverse cardio-respiratory health effects. In the last few years, epidemiological studies have provided evidence that exposure to air pollution can aggravate symptoms in asthmatic patients. Some epidemiological studies have used ambient air pollution levels based on fixed-site monitoring (FSM) data to evaluate the short-term effects of ambient air pollution levels on asthma-related

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50

Rodríguez, González Sergio. "Sources and processes affecting levels and composition of atmospheric particulate matter in the Western Mediterranean." Doctoral thesis, Universitat Politècnica de Catalunya, 2002. http://hdl.handle.net/10803/6985.

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This study is focused on the identification of the sources and processes affecting levels and composition of PM10 and PM2.5 from air quality monitoring networks in Eastern Spain. This is a multidisciplinary study. Time series of TSP and PM10 recorded from 1996 to 2000 are interpreted to assess the role of local, regional and distant sources in PM levels in this region. To this is end, the influence of the meteorology on PM levels recorded at nineteen rural, urban and industrial monitoring stations is studied by means of synoptic charts, back-trajectories and local meteorological variables. The

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