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Dissertations / Theses on the topic 'Contamination of drinking water'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Conboy, Mary Jane. "Bacterial contamination of rural drinking water wells." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ35790.pdf.

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2

Halsey, Patricia M. (Patricia Marie) 1974. "Arsenic contamination study of drinking water in Nepal." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/8978.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.<br>Includes bibliographical references (leaves 73-76).<br>A study of arsenic contamination of drinking water in Nepal was conducted. Samples were collected in Nepal in January 2000 from tube wells, hand dug wells, natural springs, municipal systems and surface water bodies. Samples were analyzed in Nepal using EM Quant@ test strips and Affiniti Concentration kits. Samples were also preserved and brought back to the U.S. for analysis using Graphite Furnace Atomic Absorption Spectrometry.

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3

Uhlman, Kristine, and Janick Artiola. "Nitrate Contamination Potential in Arizona Groundwater: Implications for Drinking Water Wells." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/156932.

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4 pp.<br>This fact sheet is to be taken from research conducted by Uhlman and Rahman and published on the WRRC web site as: "Predicting Ground Water Vulnerability to Nitrate in Arizona". Funded by TRIF and peer reviewed by ADEQ. It also follows on "Arizona Well Owner's Guide to Water Supply" and also "Arizona Drinking Water Well Contaminants" (part 1 already submitted, part 2 in process).<br>Arizona's arid environment and aquifer types allow for the persistence of nitrate contamination in ground water. Agricultural practices and the prevalence of septic systems contributes to this water qua

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4

Allevi, Richard Paul. "Quantifying Potential Sources of Microbial Contamination in Household Drinking Water Samples." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42011.

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In Virginia, over one million households rely on private water supplies (e.g. well, spring, cistern). Previous literature acknowledges bacterial contamination in private water supplies as a significant public health concern in the United States. The present study tested private wells and springs in 20 Virginia counties for total coliforms (TC) and E. coli (EC) along with a suite of chemical contaminants. Sample collection was organized by the Virginia Household Water Quality Program (VAHWQP), a Virginia Cooperative Extension effort managed by faculty in the Biological Systems Engineering De

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5

Sprouse, Terry, Dennis Cory, and Robert Varady. "Aquifer Contamination and Safe Drinking Water: The Recent Santa Cruz County Experience." Arizona-Nevada Academy of Science, 1996. http://hdl.handle.net/10150/297005.

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6

Petri, Michael. "A contamination warning surveillance for raw and drinking water from Lake Constance." Thesis, Glasgow Caledonian University, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.726763.

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7

Wolfe, Andrea N. C. (Andrea Nancy Cornell) 1977. "Microbial contamination in the Kathmandu Valley drinking water supply and Bagmati River." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9016.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.<br>Includes bibliographical references (leaves 70-71).<br>The purpose of this investigation was to determine and describe the microbial drinking water quality problems in the Kathmandu Valley. Microbial testing for total coliform, E.coli, and H2S producing bacteria was performed in January 2000 on drinking water sources, treatment plants, distribution points, and consumption points. Existing studies of the water quality problems in Kathmandu were also analyzed and comparisons of both dat

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8

Weaver, Cameron L. "Lead silicate solubility and the control of lead contamination in drinking water." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07112009-040433/.

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9

Lane, Marshalle. "Dispersive liquid-liquid micro-extraction coupled with gas chromatography for the detection of trihalomethanes in different water sources in the Western Cape, South Africa." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2852.

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Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2018.<br>Trihalomethanes (THMs) are a group of four compounds that are formed, along with other disinfected by-products. This happens when chloride or other disinfectants are used to control microbial contamination in drinking water, which then reacts with natural organic or inorganic substances in water. Trihalomethanes are better known by their common names such as chloroform, bromodichloromethane, chlorodibromomethane and bromoform. These four compounds are known to be classified as cancer group B carcinogens (shown to cau

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10

Bourne, Amanda C. "Assessing the Contamination Risk of Private Well Water Supplies in Virginia." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34252.

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When well water becomes contaminated to the extent that is does not meet EPA drinking water quality standards, it is considered unsafe for consumption. Nitrate and total coliform bacteria are both health contaminants and are both regulated in public water systems. A nitrate concentration of 10 mg/L or higher is considered unsafe, as is the presence of total coliform bacteria. Well degradation, inadequate well construction, and aquifer contamination can all result in contamination of well water. Factors such as well type, well age, well depth, treatment devices, population density, household

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11

Crouse, Anton. "The protection of water sources in developing countries." Thesis, Cape Technikon, 1986. http://hdl.handle.net/20.500.11838/2167.

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Thesis (Diploma (Civil Engineering))--Cape Technikon, 1986.<br>In rural areas in Southern Africa a nearby stream or spring is a village or kraal 's main water supply. The majority of these elementdry water sources are polluted. In this project the health hazard of polluted water and methods to protect water sources from pollution are discussed. The project consists of a report of fieldwork done in Southern Kwazula and compiling from the results a Technical Paper on water source protection.

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12

Smith, Meghan Kathleen 1976. "Microbial contamination and removal from drinking water in the Terai region of Nepal." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84288.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.<br>Vita.<br>Includes bibliographical references (leaves 81-85).<br>by Meghan Kathleen Smith.<br>M.Eng.

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13

Odem, Wilbert Irwin. "COMPETITIVE ADSORPTION OF VOLATILE ORGANIC COMPOUNDS ONTO NATURAL AND SYNTHETIC ADSORBENTS (TRICHLOROETHYLENE, 1,4-DICHLOROBENZENE, TETRACHLOROETHYLENE, CARBON TETRACHLORIDE, PREDICTIVE MODELS)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275458.

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14

Tumati, Sindhu. "Reducing Lead and Selenium from Drinking Water Using Limestone-based Material." TopSCHOLAR®, 2012. http://digitalcommons.wku.edu/theses/1176.

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Contamination of drinking water with metals is a major problem facing many areas of United States and the World. There is a need for an inexpensive remediation technology for the removal of metals in drinking water that can be applied to small rural water systems. This research will focus on the development of a process for removal of select metals from drinking water by limestone-based material. Metals in drinking water considered for this research include lead and selenium. Limestone-based material has demonstrated the potential to reduce select metals (lead, cadmium and arsenic) in drinking

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15

Uddin, G. M. Saleh. "Groundwater contamination by arsenic in Bangladesh : causes, consequences and solutions." Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ENV/09envu18.pdf.

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16

Leiter, Maria Louise. "Extent and Sources of Nitrate Contamination of Drinking Water in an Agricultural Watershed in Southwest Ohio." Miami University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1250265194.

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17

Nyamukamba, Pardon. "Preparation of photocatalytic TiO₂ nanoparticles immobilized on carbon nanofibres for water purification." Thesis, University of Fort Hare, 2011. http://hdl.handle.net/10353/367.

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Titanium dioxide nanoparticles were prepared using the sol-gel process. The effect of temperature and precursor concentration on particle size was investigated. The optimum conditions were then used to prepare carbon and nitrogen doped titanium dioxide (TiO2) nanoparticles. Doping was done to reduce band gap of the nanoparticles in order to utilize visible light in the photocatalytic degradation of organic compounds. A significant shift of the absorption edge to a longer wavelength (lower energy) from 420 nm to 456 nm and 420 nm to 428 nm was observed for the carbon doped and nitrogen doped Ti

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18

Moritz, Jeldrik [Verfasser], and Knut [Akademischer Betreuer] Wichmann. "Effect of retrograde microbial contamination on mobile drinking water systems / Jeldrik Moritz. Betreuer: Knut Wichmann." Hamburg-Harburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2013. http://d-nb.info/1048574261/34.

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19

Moritz, Jeldrik Verfasser], and Knut [Akademischer Betreuer] [Wichmann. "Effect of retrograde microbial contamination on mobile drinking water systems / Jeldrik Moritz. Betreuer: Knut Wichmann." Hamburg-Harburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2013. http://d-nb.info/1048574261/34.

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20

Sexton, Diane Lynne. "Analysis of disinfection by products in drinking water by solid phase extraction." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040321/.

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21

Huang, Shan. "Assessing the Role of Risk Communication in Reducing Exposure to Arsenic in Drinking Water." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/HuangS2005.pdf.

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22

Coulibaly, Housseini Diadié. "Drinking water quality and management strategies in small Quebec utilities." Doctoral thesis, Université Laval, 2003. http://hdl.handle.net/20.500.11794/17867.

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La présente thèse porte sur une étude des petits systèmes municipaux du Québec (en l’occurrence, ceux desservant 10 000 personnes ou moins) et comporte trois volets. Le premier volet se focalise sur un portrait historique de la qualité de l’eau distribuée et sur les stratégies de gestion. Parallèlement, il met l'historique de la qualité et les stratégies de gestion en relation avec certains paramètres importants de la qualité de l’eau. Les résultats de ce volet montrent que pour les systèmes s’approvisionnant en eau de surface et pratiquant uniquement une chloration, la différence entre le nom

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23

Albanus, Celina [Verfasser]. "Microbiological and heavy metal contamination of drinking water sources in South Luangwa Valley, Zambia / Celina Albanus." Düren : Shaker, 2020. http://d-nb.info/1227824319/34.

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24

SZABO, JEFFREY G. "PERSISTENCE OF MICROBIOLOGICAL AGENTS ON CORRODING BIOFILM IN A MODEL DRINKING WATER SYSTEM FOLLOWING INTENTIONAL CONTAMINATION." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1155831397.

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25

McNickle, Michael David. "Health and Nitrate-Contaminated Drinking Water in the Lower Yakima River Valley." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/6620.

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In the United States, many private wells are used as the only source of potable water. These wells, under current federal and state regulations, are neither monitored nor checked for water purity. The purpose of qualitative case study was to gain an understanding about how the documented nitrate contamination problem in the Lower Yakima Valley River Valley is perceived by members of the community and to measure their willingness to engage in collective action for social change. Purposive samples of 6 participants were interviewed using 10 questions derived from the drinking water disparities f

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26

Jarosh, John Joseph. "Occurrence of Aeromonas hydrophila in surface water and distribution systems of East Central Indiana." Virtual Press, 1999. http://liblink.bsu.edu/uhtbin/catkey/1125065.

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The bacterium Aeromonas hydrophila is a known fish and opportunistic human pathogen commonly occurring in surface waters supplying drinking water distribution systems. The major concern of government and drinking water providers is that A. hydrophila may invade and become established in the biofilm of a distribution system, thus potentially leading to outbreaks of disease. The purpose of this study was to survey source water, distribution system biofilm, and to establish a simulated distribution system to explore the possibility of A. hydrophila invading and becoming established under normal a

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27

Day, Stephen Wayne. "Ground water contamination from an abandoned landfill site in Delaware County, Indiana." Virtual Press, 1986. http://liblink.bsu.edu/uhtbin/catkey/474188.

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Groundwater contamination by landfill generated leachate is a problem that is increasingly addressed for proposed and existing landfill sites.This thesis examines groundwater contamination movement from the abandoned Delaware County Municipal landfill. The site is located in the crest of a highly permeable sand and gravel glacial esker which allows for rapid movement of ground water and any contaminants introduced into it.The landfill site was originally investigated in the late 1970's by Ed Lusch, a graduate student at the Ball State University Geology Department. That study showed some indic

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28

Chadduck, James B. "Degradation of tertiary butyl alcohol by a Pseudomonas sp. isolated from groundwater." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/101172.

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A <i>Pseudomonas</i> sp. capable of degrading tertiary butyl alcohol (TBA) as a sole carbon source, was isolated from a groundwater aquifer (50 ft. deep) at a petroleum refinery. The most probable number (MPN) of TBA degrading microorganisms was 4.9 x 10³ organisms/g (dry wt) of subsurface soil. Pristine subsurface soils, which did not have a history of petroleum contamination, had MPNs of < 2 TBA degrading organisms/g (dry wt) indicating a natural enrichment process at the refinery site. The Q<sub>O2</sub> of <i>Pseudomonas</i> sp. was 4.2 ml O₂/mg dry wt/h when TBA was the substrate. The opt

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29

Arey, J. Samuel (Jeremy Samuel) 1975. "Anticipation nationwide risks to drinking water : predicting local scale contamination of community supply wells by gasoline additives." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/17511.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.<br>"June 2001."<br>Includes bibliographical references.<br>Only ten years after the increased addition of methyl-tert-butyl-ether (MTBE) to U.S. gasolines, nationwide MTBE contamination of thousands of drinking water supply wells has been widely documented, reflecting enormous environmental and economic costs. Due to its abundance in gasoline, high aqueous solubility, and slow degradation rate in aquifers, MTBE has migrated in significant quantities from subsurface gasoline spills to a sub

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30

Wahlstrom, Meghan. "Drinking Water in the Developing World: Sources of Fecal Contamination in Pitcher Pump Systems and Measurement Alternatives." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5146.

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It has been reported that globally we have achieved Millennium Development Goal (MDG) Target 7C, to halve the proportion of the population without access to safe drinking water; however, there is a major flaw with this statement. While Target 7C calls for access to `safe' drinking water, what is actually being measured and reported is access to an `improved' water source. The World Health Organization (WHO) maintains that they must use this proxy measure because the methods for water quality testing are too expensive and logistically complicated, but by doing so, they may be over reporting saf

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31

Booi, Xolelwa. "Perfluorinated compounds and trihalomethanes in drinking water sources of the Western Cape, South Africa." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/863.

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Thesis submitted in partial fulfilment of the requirements for the degree of MAGISTER TECHNOLOGIAE: CHEMICAL ENGINEERING in the FACULTY OF ENGINEERING at the CAPE PENINSULA UNIVERSITY OF TECHNOLOGY 2013<br>This study focused on quantifying two types of internationally regulated contaminants found in drinking water: 1) Trihalomethanes (THMs) and 2) Perfluorinated compounds (PFCs). The first contaminants monitored were THMs, classified as a group of chemicals that are formed along with others during the disinfection of water using liquid chlorine, chlorine dioxide or chlorine gas. Hence, the res

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32

CLINTON, CAROL. "Kinetics of Chlorination of the Pesticide Aldicarb in Drinking Water." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1218732380.

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33

Won, Gayeon. "Bacterial Contamination of Water In Agricultural Intensive Regions of Ohio, USA." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338163933.

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34

COTRIM, MARYCEL E. B. "Avaliação da qualidade da água na bacia hidrográfica do Rio Ribeira de Iguape com vistas ao abastecimento público." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11568.

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Made available in DSpace on 2014-10-09T12:53:21Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:58:30Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

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35

Bílková, Zuzana. "Odstraňování reziduí specifického antropogenního znečištění vody organickými látkami s hormonálními účinky při úpravě na vodu pitnou." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216804.

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Submitted master's thesis is dealing with the problem of occurrence of residues of specific anthropogenic pollution of drinking water sources, with accent on possibilities of elimination of these compounds during drinking water treatment. There was pay attention to two estrogenic hormones – estradiol and ethinylestradiol. In laboratory scale there was tested efficiency of coagulation, activated carbon adsorption and ozonation in elimination of studied compounds from artificially contaminated water.

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36

Chastain, James R. Jr. "A Heuristic Methodology for Locating Monitoring Stations to Detect Contamination Events in Potable Water Distribution Systems." Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/988.

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The requirements to protect public water systems from intentional contamination have expanded in the years following September 11, 2001. The areal extent and non-linear nature of water demand and movement in the distribution system makes efficient location of sampling points difficult. This difficulty is compounded by the fact that contamination conceptually can occur at any point and at any time within the distribution system. Small to mid-sized water systems are especially at a disadvantage in addressing this issue due to limited resources available to them. This paper proposes a heuristic m

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37

Ferguson, Christobel Margaret Biotechnology &amp Biomolecular Science UNSW. "Deterministic model of microbial sources, fate and transport: a quantitative tool for pathogen catchment budgeting." Awarded by:University of New South Wales. Biotechnology and Biomolecular Science, 2005. http://handle.unsw.edu.au/1959.4/23451.

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The most important priority for the management of Australian drinking water catchments is the control of pathogen loads delivered to raw water reservoirs and treatment plant intakes. A process-based mathematical model was developed to estimate pathogen catchment budgets (PCB) for Cryptosporidium, Giardia and E. coli loads generated within and exported from catchments. The model quantified key processes affecting the generation and transport of microorganisms from humans and animal excreta using land use and hydrologic data, and catchment specific information including point sources such as s

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38

Tissier, Adeline. "Evaluation de l'état de viabilité et du pouvoir d'infectiosité de trois micro-organismes pathogènes pour l'homme (bactérie Campylobacter, virus Adenovirus et parasite Cryptosporidium) détectés dans des échantillons d'eaux destinées à des fins alimentaires." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0034/document.

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L'objectif de ce travail a consisté à (i) déterminer l'occurrence et (ii) à étudier le comportement de différents micro-organismes pathogènes pour l'Homme reconnus comme responsables d'épidémies d'origine hydrique dans des ressources (eaux de surface et eaux de nappes) et des eaux traitées de plusieurs collectivités situées le long de la Moselle. Trois agents microbiologiques aux propriétés morphologiques et intrinsèques très différentes ont été étudiés: des bactéries (C. jejuni et C. coli), des virus entériques (adénovirus humains dont les adénovirus entériques), des parasites (C. parvum, C.

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39

Ratikane, Mosepeli. "Quality of drinking water sources in the Bloemfontein area of the Mangaung Metropolitan Municipality." Thesis, Bloemfontein : Central University of Technology, Free State, 2013. http://hdl.handle.net/11462/210.

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Thesis (M. Tech. (Environmental Health)) -- Central University of technology, Free State, 2013<br>Introduction: Drinking water of poor quality can cause a variety of diseases and may even result in death. The impact of poor drinking water is a course for concern even in South Africa. Therefore, the physical, chemical and microbiological drinking water quality was investigated in the peri-urban area of Bainsvlei and the Woodlands Hills Estate in Bloemfontein, Free State. Materials and Methods: The water quality was assessed in 20 identified sampling sites for three series with ten weeks apar

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Murduca, James V. "Assessment of Drinking Water Quality Management and a Treatment Feasibility Study for Brick by Brick Water Storage Tanks in Rakai Uganda." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7200.

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Reliable access to safe drinking water is one necessity for humans to live without concern for major health risks. The overall goal of this research is to improve the public health, through improved drinking water, for communities in the Rakai District in Uganda, directly, and other communities in the world, indirectly, via dissemination of knowledge. This study specifically assessed the knowledge of drinking water quality in regards to public health, their sanitation measures, and water treatment methods for users of Brick by Brick rainwater harvesting tanks in the Rakai District (N = 28) by

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41

Imwer, Serge Mapan. "Adsorption of perfluorinated water contaminants on Agave sisalana activated carbon fibre." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/867.

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Thesis submitted in fulfilment of the requirements for the degree Magister Technologiae: Chemical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2014<br>An awareness campaign on the harmful effects of Perfluorinated compounds (PFCs), especially Perfluorooctanoic acid (PFOA) and Perfluorooctane sulfonate (PFOS) has been conducted to inform the general public about the impact of these organic compounds on hu-mans and biota. These compounds have been shown to be potential carcinogens, as indi-cated by the United States Environmental Protection Agency (USE

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42

Luyt, Catherine Diane. "Faecal source tracking and water quality in the Eastern Cape, South Africa." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1018242.

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Water quality is concerning as many still lack access to safe drinking water. Alternate sources such as rivers (FC up to 1600 CFUs/100 mL) and rainwater are often polluted. Rainwater tanks require maintenance to improve water quality, but could be used for non-potable purposes or irrigation. Grahamstown infrastructural failures initiate deviations from DWAF 1996 domestic water guidelines for microorganisms within the distribution system. Frequent testing can decrease risks of waterborne diseases. Limitations to this are inaccessibility of rural areas, distances from testing centres and costs.

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Buttice, Audrey Lynn. "Reducing Sediment and Bacterial Contamination in Water Using Mucilage Extracted from the Opuntia ficus-indica Cactus." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002944.

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44

Arnold, David Frederick. "Environmental Justice in Virginia’ s Rural Drinking Water: Analysis of Nitrate Concentrations and Bacteria Prevalence in the Household Wells of Augusta and Louisa County Residents." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/33759.

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This research studied two predominantly rural counties in Virginia to understand whether residents have equal access to uncontaminated drinking water by socio-economic status. Statistical associations were developed with the total value of each residence based on county tax assessment data as the independent variable to explain levels of nitrate, the presence of bacteria (total coliform and Escherichia coli), and specific household well characteristics (well age, well depth, and treatment). Nearest neighbor analysis and chi-square tests based on land cover classifications were also conducted

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45

Choi, Dong-Won. "Detection of pathogenic Aeromonas spp. from a simulated water distribution system using PCR." Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1189409.

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Recently the EPA placed Aeromonas hydrophila on the Candidate Contaminant List (CCL). It has long been known to be a pathogen of cold blooded animals and now is a suspected human opportunistic pathogen as well. Among the various virulence factors produced by A. hydrophila, the cytolytic enterotoxin (AHCYTOEN) is by far one of the most important contributors to the pathogenicity of the organism. This factor is also produced by other pathogenic Aeromonas spp. In this study, PCR technology was used to detect AHCYTOEN gene from a simulated water distribution system. A set of primers was selected t

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46

Singh, Inderjit. "Significance of building and plumbing specifics on trace metal concentrations in drinking water." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28724.

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Samples were taken from 72 high-rise apartment suites (6 suites in 12 individual high-rise towers) and 60 single-family houses located within the Greater Vancouver Regional District. The influence of the following factors on trace metal concentrations in 1-L first-flush drinking water samples and running hot water samples was investigated: building height, location, plumbing age, type of plumbing and type of building. Results of this survey show that with the exception of building height, all factors had a correlation with one or more of the trace metals investigated. The trace metals examined

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47

Lewtas, Paul. "Investigation of interferences and development of pre-treatment methods for arsenic analysis by Anodic Stripping Voltammetry." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2015. https://ro.ecu.edu.au/theses/1590.

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Contamination of drinking water is a serious health issue in many developing countries and there is a recognised need for low cost portable systems that are capable of analysing drinking water down to low ppb levels. Anodic Stripping Voltammetry (ASV) instruments meet these requirements but suffer interferences from other species which may also be present in the sample, particularly organics, other metals and sulfides. The last of these has received surprisingly little attention in the literature, despite being a proven interferent. This study investigates the impact of each of these interfere

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Sharek, Robert Christopher. "Well characteristics influencing microscopic particulate analysis risk index." Master's thesis, University of Central Florida, 1998. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/57933.

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University of Central Florida College of Engineering Thesis<br>Cryptosporidium parvum is a common surface water contaminant that can cause illness in human beings. The presence of this etiological agent in groundwater identifies the groundwater as under the direct influence (GWUDI) of surface water. Currently the determination of SWUDI water sources requires an expensive, labor-intensive laboratory procedure call the Microscopic Particulate Analysis (MPA). The results of the MPA provide a risk index that rates the degree of surface water contamination. The objective of this study is to ide

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Zhang, Yanling. "Hydrophobic organic compounds (HOCs) and algal derived organic materials (AOM) in drinking reservoirs around the Pearl River Delta Region : effects of chlorination and protecting effects of dietary antioxidants against genotoxic disinfection byproducts (DBPs)." HKBU Institutional Repository, 2012. https://repository.hkbu.edu.hk/etd_ra/1403.

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Young, Kevin Andrew. "The Mucilage of Opuntia Ficus Indica: A Natural, Sustainable, and Viable Water Treatment Technology for Use in Rural Mexico for Reducing Turbidity and Arsenic Contamination in Drinking Water." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/3832.

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The use of natural environmentally benign agents in the treatment of drinking water is rapidly gaining interest due to their inherently renewable character and low toxicity. We show that the common Mexican cactus produces a gum-like substance, cactus mucilage, which shows excellent flocculating abilities and is an economically viable alternative for low-income communities. Cactus mucilage is a neutral mixture of approximately 55 high-molecular weight sugar residues composed basically of arabinose, galactose, rhamnose, xylose, and galacturonic acid. We show how this natural product was characte

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