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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 82 for “"natural organic matter"”.
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Rotavirus interactions with silica and natural organic matter
… in the presence or absence of Suwannee Riven natural organic matter (SRNOM). Rotavirus aggregation was detected in SRNOM and divalent cation-containing solutions, and was faster than in the solely presence of divalent cations. Calculated attachment efficiencies were always higher in CaCl2 than …
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The large scale understanding of natural organic matter : processes and application
Natural biogeochemical cycles of the macronutrient elements carbon (C), nitrogen (N) and phosphorus (P) have been transformed by food and fuel production, through atmospheric pollution and climate change. Further, land disturbance has led to considerable losses of nutrients from terrestrial …
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Interactions of arsenate, natural organic matter (NOM), and goethite (a-FEOOH)
Includes bibliographical references.
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Development of a reverse osmosis/electrodialysis process to concentrate natural organic matter
… unintended consequence, disinfectants react with natural organic matter (NOM) and other background constituents to form disinfection by-products (DBPs). Each disinfectant produces a different range of DBPs. While toxicity effects of many individual DBPs have been studied, the effect of …
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Optimizing a hybrid reverse osmosis/electrodialysis system for natural organic matter concentration
… to determine an optimum way to concentrate natural organic matter (NOM) for chemical and biological characterization of disinfection by-products (DBPs). RO is an effective way to concentrate NOM. However, it also concentrates inorganic ions which lead to an increase in the osmotic pressure, …
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Approaches to modeling pathogen and natural organic matter removals in slow-rate biofilters
… semi-empirical models that predict pathogen and natural organic matter removals within these natural and engineered sand filters. The more complex pathogen model, or phenomenological colloidal filtration theory (pCFT), applies the 1937 Iwasaki solution to New England pilot scale E. coli …
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Characterization of natural organic matter and precursors to trihalomethanes using spectral flourescence signatures
… system. Nonetheless, chlorine reacts with Natural Organic Matter (NOM) and forms potentially carcinogenic Disinfection By-products (DBPs). The major chlorination DBPs are dominantly Trihalomethanes (THMs). However, not all organic compounds are equally reactive to THMs formation. NOM in …
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Colloid Formation for the Removal of Natural Organic Matter during Iron Sulfate Coagulation
Removal of organic matter is increasingly important to drinking water utilities and consumers. Organic matter is a significant precursor in the formation of disinfection by-products (DBPs). The maximum contaminant levels for (DBPs) are decreasing and more DBPs are believed carcinogenic. Traditional …
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Effects of Background Ions on Polyethersulfone (Pes) Membrane Fouling by Natural Organic Matter (Nom)
"Hence, NOM aggregation was experimentally evaluated by dynamic light scattering measurements with SRNOM. These tests showed that calcium caused formation of supramolecular NOM clusters. Large-scale MD simulations with multiple NOM molecules were then performed to probe possible formation of …
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Mechanisms of competitive adsorption between trace organic contaminants and natural organic matter on activated carbon
… used in water treatment for removal of various organic micropollutants; nonetheless, the presence of natural organic matter (NOM) in source water can reduce its efficiency for micropollutant removal. NOM has been shown to compete with target contaminant via different mechanisms: direct …
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The Effect of Natural Organic Matter on UV/H<sub>2</sub>O<sub>2</sub> Treatment and the Effect of UV/H<sub>2</sub>O<sub>2</sub> Treatment on Natural Organic Matter
… produces hydroxyl radicals that degrade organic micro-pollutants. However, radicals react non-selectively with natural organic matter (NOM). This research effort quantified the effect of NOM variation on the efficiency of UV/H<sub>2</sub>O<sub>2</sub> contaminant destruction, explored the …
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Influence of natural organic matter on the mobility of arsenic in aquatic systems, soils and sediments
… today recognized as one of the most dangerous inorganic contaminants and threats for the world’s water resources. Arsenic is ubiquitious in the earth crust and humans are especially affected through As polluted drinking water supplies. The occurrence of high As groundwater concentrations is often …
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Aromatic Rich Natural Organic Matter Increases Growth and Reduces Nickel Toxicity in a Wild Daphnia Hybrid
Natural organic matter (NOM) is on the rise across the Shield. Its heterogeneous, amalgamate nature makes each NOM source potentially unique. Relatively little is known about the direct effects distinct NOM sources have on daphniids, or the varying protection NOM provides against metal toxicity …
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Fluorescence Based Approach to Drinking Water Treatment Plant Natural Organic Matter (NOM) Characterization, Treatment, and Management
Natural organic matter present in freshwaters plays a major role in any drinking water treatment facility because of its influence on the performance of treatment stages such as the coagulation-flocculation process and the formation of disinfection by-products (DBP) derived from the NOM-oxidant …
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Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
Natural organic matter (NOM) is a generic term for a mixture of organic, slightly water-soluble components found in soil, sediment and natural waters, which represents severe challenges for the process control in water treatment plants as well as water distribution systems. The effective removal of …
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Comprehensive Analysis of Effluent Organic Matter from Five Wastewater Treatment Plants in Connecticut and Comparison to Natural Organic Matter
<p>Natural organic matter is an important driver of biotic and abiotic processes in aquatic environments. Wastewater treatment plants discharge a substantial amount of organic matter into the environment; however effluent organic matter has not been well studied. In this study, traditional organic …
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New Insights into Lead and Copper Corrosion: Impacts of Galvanic Corrosion, Flow Pattern, Potential Reversal, and Natural Organic Matter
… chemistry, and the interplay between alkalinity, natural organic matter (NOM), and orthophosphate (added as corrosion inhibitor) may have a significant influence on corrosion of common lead plumbing materials. Results of bench-scale experiments demonstrate that in some waters galvanic corrosion …
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Role of temperature and Suwannee river natural organic matter on inactivation kinetics of rotavirus and bacteriophage MS2 by solar irradiation
Made available in DSpace on 2011-05-25T14:39:48Z (GMT). No. of bitstreams: 3 Romero_Ofelia.pdf: 6501565 bytes, checksum: fe0aa589df9e541a23580f2363d03961 (MD5) license.txt: 4062 bytes, checksum: 829b47b3a3520d37a121ee82aa85744f (MD5) Romero_Ofelia.doc: 1506304 bytes, checksum: …
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