Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Water treatment processes"”.
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The effect of various oxidants on water treatment processes
The effects of four oxidants upon water treatment process parameters were investigated. The four oxidants under consideration were ozone, chlorine dioxide, potassium permanganate, and chlorine, Experimentation was directed towards the impact of these oxidants upon turbidity, TOC, and color removal, …
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Appropriate technology water treatment processes for MaeLa Temporary Shelter, Thailand
… horizontal-flow roughing filters to treat spring water of variable annual quality in MaeLa Temporary Shelter, Thailand. The public drinking water system for 45,000 refugees is overseen by Aide Medicale Intemacionale, with which this project was conducted. Half the drinking water for the camp is …
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Determining the removal effectiveness of flame retardants from drinking water treatment processes
… have recently become a concern in the surface water environment. The concern expands to drinking water treatment processes, and whether or not they remove these chemicals while going through the treatment plant. In this study, the concentrations of organophosphoric acid triester flame …
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Effectiveness of water treatment methods for removal of haloforms and their precursors
Using a simulated lake water containing humic acid, various combinations of water treatment processes were utilized to determine their effect on precursor removal and haloform removal subsequent to their formation. Laboratory tests t including temperature, pH, alkalinity, absorbance, and chlorine …
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Effects of water treatment on pesticides in freshwaters.
… was to evaluate the effectiveness of various water treatment processes for the removal of selected pesticides from freshwaters. Of particular interest were the herbicides likely to contaminate water courses used for potable water supplies in Grampian Region. Laboratory based simulation …
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Monitoring Photocatalytic Degradation of X-ray Contrast Media with Raman Spectroscopy
… diatrizoate and iohexol have been found in wastewater and drinking water and are difficult to remove because they are resistant to water treatment processes. A removal process can be started with ultraviolet photocatalytic degradation of X-ray contrast media in the presence of titanium dioxide or …
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Thermal Analysis of Binding of Organic Pollutants to Titanium Dioxide
<p>Conventional waste water treatment processes are not completely effective in removing highly stable organic compounds. Photocatalytic degradation on titanium dioxide is a possible alternative technique for many classes of these compounds. Several studies have been done by other researchers to …
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Metal-organic frameworks for water treatment
… application of metal-organic frameworks in waste water treatment and the synthesis of new metal-organic frameworks.<br/><br/>Chapter one gives a general overview of water-treatment processes, the methods and materials used in these processes, and also the structures and properties characteristics …
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Chlorine dioxide by-products in drinking water and their control by powdered activated carbon
… and chlorate (CI03) were evaluated following pretreatment of raw water by CI02 at water treatment plants in New Castle, Pennsylvania; Charleston, West Virginia; Skagit, Washington; and Columbus, Georgia. Chlorite and chlorate concentrations were unaffected by any of the water treatment processes …
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In-line treatment of metal contaminated storm water by charred microporous polymers
… the feasibility of using an in-line storm water treatment system to remove heavy metals from storm water discharges. There are a number of commercially available microporous carbons that have a demonstrated affinity for the uptake of metals. Industry currently utilizes in-line storm water …
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The detection and quantitation of agricultural chemicals in some freshwaters used for potable water supplies in Grampian Region.
… project was to examine local sources of potable water supply for traces of organic pollutants which have been used during agricultural practices. A specific aim was to analyse water sources for herbicides (weedkillers) regularly used within the area of Scotland known as Grampian Region. Of …
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Drinking water disinfection by-products detection, formation and the precursors removal study
… and HAAs were observed after disinfection of water containing high level of iodide and are proved to be more toxic than their corresponding chlorinated and brominated species. In the presented dissertation, a novel rapid and sensitive high performance ion chromatography-tandem mass …
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Management of disinfection byproduct production in small drinking water systems
… (DBPs) currently regulated in drinking water are trihalomethanes (THMs) and haloacetic acids (HAAs). The objective of this research was to better understand how the water treatment processes employed at four smaller municipal water treatment utilities affects THM and HAA formation by …
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Effect of wastewater colloids on membrane removal of microconstituent antibiotic resistance genes
… problem, there is growing interest in advancing water treatment processes capable of limiting ARG dissemination. This study examined the potential for membrane treatment of microconstituent ARGs, and the effect of wastewater colloids on their removal. Native and spiked extracellular vanA …
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AI/ML tools for early decision making in water system operations: managing non-stationarity water quality
… range of variability has traditionally guided water system management and allowed water utilities to experience steady state operations. These steady state operations are viewed as the 'normal state' of the water system. However, non-stationarity events such as wildfires, droughts, and floods …
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Can Water Professionals Transform Pharmaceutical Disposal Practices of Hospice Nurses?
… with pharmaceutical disposal in regard to water quality. The purpose of the study is to investigate the current pharmaceutical disposal practices of hospice nurses, the attitudes of hospice nurses regarding current pharmaceutical disposal practices, and explore ways to educate the hospice …
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A Framework for Standardized Monitoring of Antibiotic Resistance in Aquatic Environments and Application to Wastewater, Recycled Water, Surface Water, and Private Wells
… in two independent laboratories on a set of six water matrices: wastewater, recycled water, and surface water from six different wastewater utilities engaging in water reuse located in five states across the USA. The impact of wastewater treatment and advanced water treatment processes was …
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Potential of Ozone and Hydroxyl Radicals to Degrade Emerging Organic Contaminants
<p>Advanced water treatment processes are necessary for the treatment of emerging organic contaminants. Traditional treatment processes do not filter or treat these contaminants causing humans and animals to come into contact and ingest them, both causing illness. Advanced oxidation processes are a …
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Development and Evaluation of Photocatalytic Linear Engineered Titanium Dioxide Nanomaterials for the Removal of Disinfection Byproduct Precursors from Drinking Water
… has long been touted as a potential drinking water treatment technology but has proven difficult to implement at full scale. This project aimed to address two of the perennial challenges preventing the use of photocatalysis for drinking water treatment: the need to safely remove the …
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Effective management solutions for biogenic odour in drinking water
Biogenic taste and odour in drinking water has become a global concern for water utilities, as eutrophication and climate change are increasing the likelihood of algal blooms and other microbial events in waterbodies. Unpleasant taste and odour perceived by consumers may result in complaints and …
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