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Showing 1 to 20 of 132 for “"NOM"”.
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Ozone-bromide-NOM interactions in water treatment
… a suspected carcinogen. Natural organic matter (NOM) reads with HOBr/OBr$\sp{-}$ to form organic bromine (TOBr).
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Les statuts du nom dans les romans de Raymond Queneau
… us to form that perception. This traditional onomastic approach restricts itself to the semantic sense of a given name, its role as metaphor for the character it names.
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Interactions of arsenate, natural organic matter (NOM), and goethite (a-FEOOH)
Includes bibliographical references.
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Combined coagulation and membrane microfiltration for removal of natural organic material (nom)
The removal of natural organic matter (NOM) is a key requirement of many processes in potable water treatment. Conventionally, removal of NOM and colloidal material has been achieved by coagulation with inorganic coagulants followed by either direct rapid gravity filtration alone or clarification …
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Influence of pH and NOM on Sorption of Phenols onto Aquifer Material
… investigated. In this study influence of pH and NOM on the sorption of three different phenols (2-methyl-4,6-dinitrophenol, 2,4,6-trichlorophenol and pentachlorophenol) on a natural sandy aquifer material collected from a bank filtration site was studied in flow through column experiments. In …
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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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Fluorescence Based Approach to Drinking Water Treatment Plant Natural Organic Matter (NOM) Characterization, Treatment, and Management
… disinfection by-products (DBP) derived from the NOM-oxidant reaction in the disinfection step. In this study, samples of raw and treated water after coagulation were collected from drinking treatment systems serving the cities of Akron, Barberton, Newton Falls and Ravenna (OH). Sampling was …
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Construcció d'un SIG de base municipal amb assignació automàtica del nom de carrer a les illes d'habitatges d'una determinada població
El present treball Final de Carrera és un apropament als Sistemas d'Informació Geogràfica (SIG), segons dues vessants: la teòrica, oferint informació general sobre els SIG, i la pràctica, mostrant el desenvolupament d'una aplicació concreta basada en programari SIG.
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Evaluation of Chelex 100 and Assessing the Impact of Fulvic Acid (NOM) on Copper Toxicity and Bioavailability to Americamysis bahia
… at a constant 12.5 mg/L natural organic matter (NOM) did not affect percent bioavailability. There were also no noticeable effects when varying total Cu concentration in the presence of 0, 12, and 24 mg/L NOM. An increase in pH from 4 to 8.5 and NOM from 0 mg/L to 12.5 mg/L reduced percent …
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Cultivar, Mowing Height, and Herbicide Effects on Bermudagrass, Cynodon Dactylon [L.] Pers., Suppression in Tall Fescue, Schedonorus Arundinaceus [Schreb.] Dumort., Nom. Cons.
… Schedonorus arundinaceus [Schreb.] Dumort., nom. cons. The experimental design was a split plot design with whole plots consisting of varying mowing heights and split plots consisting of different herbicide treatments with three replications. Two separate experiments were conducted. The tall …
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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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Understanding and Predicting Water Quality Impacts on Coagulation
… turbidity and natural organic matter (NOM), are explored in the context of removal during coagulation, and the influence of co-occurring ions is described. While it is apparent that NOM character determines the minimum achievable organic carbon residual, the effects of water …
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Hydrogen peroxide mediated oxidation of ferrous iron and associated production of hydroxyl radicals in natural aquatic systems
… process. The impact of natural organic matter (NOM) upon the H2O2-mediated oxidation of Fe(II) has been explored under both circumneutral freshwater and seawater conditions, with addition of NOM resulting in markedly slower Fe(II) oxidation rates compared to inorganic Fe(II). The formation of …
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Optimizing a hybrid reverse osmosis/electrodialysis system for natural organic matter concentration
… 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, eventually rendering RO …
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Removal of disinfection by-product precursors by activated carbon and MIEX(R)
The objective of this research was to investigate NOM removal with activated carbon and MIEX(R). Hydrophilic (HPI), hydrophobic (HPO), and transphilic (TPI) NOM was fractionated and subsequent DBP formation from these fractions was studied. Several new adsorptive materials (greensand, carbon …
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Development of adsorption filtration process for virus removal for drinking water treatment
… can achieve high log removal it is not economical. The main objective of this study is to test and validate a novel adsorption filtration (AF) technology for removing viruses from GW sources for drinking water production in New Jersey. The convective diffusion of viruses to adsorbent …
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Insect-Induced Forest Disturbance Impacts on Select Water Quality Parameters in a Closed Drinking Water Reservoir
… water reservoirs. Natural organic matter (NOM) directly impacts water treatment process effectiveness and is identified as an emerging contaminant of concern. Few studies have examined how insect-induced forest disturbance contributes to abiotic inputs. This study utilized a western hemlock …
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Development and application of fractionation procedure for drinking water organic matters
… recommends reduction of natural organic matters (NOM), DBP precursors, to achieve this regulatory goal. Studies relating NOM with DBP include fractionation of water samples, characterization of collected organic fractions, fractions' formation potential tests, and jar or similar tests to remove …
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Kinetics and Speciation of Brominated Disinfection by -Products During Ozonation
… chemical components in natural organic matters (NOM). The apparent second-order rate constants increased with pH between 4.0 and 8.5 suggesting that a major reaction pathway is the reaction between phenoxides and HOBr. Bromination of phenols by HOBr was found to be approximately 1000 times faster …
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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
… 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 kinetics of hydroxyl radical/NOM reactions, determined the effect of …
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