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 28 for “"water matrices"”.
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Factors Affecting Mobility of Copper in Soil-Water Matrices
… shown that copper is sometimes found in ground water near these fields. Therefore, a laboratory study was undertaken to determine if this copper can result from plasticulture application and to determine the mechanisms that account for the movement through soil to the subsurface. From the …
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Peroxidase-mimicking nanomaterials for the detection of mercury (II) ions in water matrices
… due to population growth, climate change and water deprivation. Mercury (Hg) is one of the most toxic elements on Earth, and continues to cause major threats to aquatic life, human health and the environment. Toxic methylmercury (MeHg) arises from atmospheric deposition and forms through …
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Continuous-flow photocatalytic treatment of pharmaceutical micropollutants: activity, inhibition, and deactivation of TiO2 photocatalysts in natural water matrices
Made available in DSpace on 2012-09-18T21:18:59Z (GMT). No. of bitstreams: 2 Carbonaro_Sean.pdf: 2621237 bytes, checksum: 5fc720bdde6038dc49b55d7e2a910a3a (MD5) license.txt: 4064 bytes, checksum: 5773ab6b14d3b6df5974ca74f7c7db18 (MD5)
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Dynamics of Simultaneous Nitrite Ion and Ammonia Chlorination in Complex Water Quality Matrices and their Impact on Chlorine Residual Speciation during Disinfection
… comprehensively, the kinetics of chlorination in water matrices containing ammonia in the presence of nitrite ion have not been fully understood. The coexistence of the two nitrogen compounds is a phenomenon most often encountered during biological nitrification of municipal wastewaters. The …
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Part-I Characterization of phorbol ester; the predominant toxic component of Jathropha curcas and development of an efficient process for the detoxification of Jathropha curcas meal Part-II quantification of 2-hydroxy-4-(methylthio) butanoic acid and pantothenic acid in bovine serum and sea water matrices
<p>"Jatropha curcas is has often been touted as the most sustainable biofuel source. Jatropha curcas is a drought resistant perennial plant belonging to the Euphorbiaceae family. Interest in this plant as a biofuel source is related to high lipid (triglyceride) content of its seeds. However, …
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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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Removal of selected water disinfection byproducts, and MTBE in batch and continuous flow systems using alternative sorbents.
… were conducted on spiked Milli-Q® and lake water matrices. Results indicate considerable sorption of TCE (68.9%), slight sorption of bromate ions (19%) and no appreciable sorption for the other test compounds on LWA. The sorption of TCE increased to 75.3% in experiments utilizing smaller LWA …
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Squaramide- and Urea-based Supramolecular Gels: Characterization and Environmental Applications
… removal of different classes of pollutants from water matrices. This thesis explores the synthesis and characterization of eighteen new low molecular weight gelators (LMWGs), eleven based on the squaramide scaffold and seven based on the urea scaffold, their ability to form supramolecular gels, …
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Emerging Contaminants: Occurrence of ECs in Two Virginia Counties Private Well Water Supplies and Their Removal from Secondary Wastewater Effluent
… that have been detected in various environmental matrices, including drinking water supplies at trace concentrations (ng/L-ug/L or ng/kg-ug/kg). Current wastewater treatment plant technology is largely ineffective at removing ECs. The objectives of this investigation were to: 1) determine the …
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Comparison of ion chromatography and flow injection analysis methods for monitoring chlorite and chlorate ions in drinking water
… regulations on chlorine dioxide in drinking water treatment require low level measurement of chlorite ion (CI0₂-) and chlorate ion (CI0₃-). This research investigated analysis of CI0₂- and CI0₃-; in drinking water by flow injection analysis with iodometric detection (FIA) and ion …
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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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Effect of combined UV and free chlorine on the formation of chloronitromethanes
… of this study show that, in deionized (DI) water matrices, MCNM forms in greater quantities at chlorine to nitrogen (Cl:N) ratios less than 3, while TCNM forms in greater quantities at Cl:N ratios greater than 3. Even so, the increase in TCNM formation did not increase linearly as the Cl:N …
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Development of oxorhenium complexes and bimetallic Re-Pd/C catalysts for perchlorate reduction in water
… contaminant that is ubiquitous in drinking water sources. Efficient and sustainable technologies are needed to treat ClO4- in drinking water and ion exchange (IX) waste brine. This thesis study focuses on the development, mechanistic study and application of novel bimetallic heterogeneous …
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Evaluation of silver nanoparticle-fortified biochar as a reactive filter media for irrigation water disinfection
… contamination pathway is contaminated irrigation water. In an effort to combat the issue of foodborne illnesses, the U.S. Food and Drug Administration introduced new regulations targeting the food production industry, including a stricter law regarding the allowable amount of bacteria in …
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Catalytic Ozonation of Emerging Pollutants in Water in the Presence of MCM-41 and Fe-MCM-41
… (ibuprofen (IBU) and oxalic acid (OA)) in water in a catalytic ozonation process was investigated in this thesis. This study particularly addresses the preparation of modified catalysts, the role of pH and water matrices on the performance and stability of the catalysts, reaction pathways, …
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Human Norovirus in Artificial and Environmental Marine Water: Development of Antibody Based Rapid Methods
… the virus from contaminated surrounding waters. The consumption of raw or undercooked contaminated oysters may result in acute gastroenteritis. We investigated the occurrence of NoV GI and GII and microbial indicators of fecal contamination in oysters and harvesting water from areas along …
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Performance and characteristics of controlled release matrices composed of hydroxpropylmethylcellulose and other polymers.
… the release of propranolol hydrochloride from matrices. Gels were characterized by U tube viscometry and their cloud points of gels. The properties of polymers and their mixture in matrices or in gels were investigated by differential scanning calorimetry (DSC). Compendial dissolution …
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Development and Application of Rapid Methods for the Analysis of Selected Pollutants in Environmental Aquatic Matrices
… of specific pesticides which are listed on the Water Framework Directive (2000) as priority substances for eradication from aquatic environments. <br/><br/>Twelve target analytes comprising of triazine herbicides, phenylureas and chloroacetanilides were determined in samples of river water from …
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INVESTIGATION OF CHEMOMETRICS METHODS FOR CHARACTERISING DRIFT PHENOMENA IN iCK-AES
… protocol. Finally, the effects of chemical matrices on the long-term stability of the emission signals have been evaluated. Three synthetic matrices were prepared simulating nitric, soil and water matrices. The stability of the instrument when working wrth these matrices at both robust and …
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Deactivation and regeneration of immobilized titanium dioxide photocatalysts during treatment of pharmaceutical micropollutants in groundwater
… contaminants are being detected in natural waters, including many pharmaceuticals and personal care products (PPCPs). Many of these chemicals are recalcitrant to conventional treatment processes, so new treatment methods are being investigated. Titanium dioxide (TiO2)-based photocatalytic …
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