نتایج جستجو برای: thms

تعداد نتایج: 398  

Journal: :Water research 2013
Sabrina Simard Robert Tardif Manuel J Rodriguez

Swimming is one of the most popular aquatic activities. Just like natural water, public pool water may contain microbiological and chemical contaminants. The purpose of this study was to study the presence of chemical contaminants in swimming pools, in particular the presence of disinfection by-products (DBPs) such as trihalomethanes (THMs), haloacetic acids (HAAs) and inorganic chloramines (CA...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2009
Stuart W Krasner

When drinking water treatment plants disinfect water, a wide range of disinfection by-products (DBPs) of health and regulatory concern are formed. Recent studies have identified emerging DBPs (e.g. iodinated trihalomethanes (THMs) and acids, haloacetonitriles, halonitromethanes (HNMs), haloacetaldehydes, nitrosamines) that may be more toxic than some of the regulated ones (e.g. chlorine- and br...

Journal: :Environmental science & technology 2017
Yi-Hsueh Chuang William A Mitch

Ozonation followed by biological activated carbon (O3/BAC) is being considered as a key component of reverse osmosis-free advanced treatment trains for potable wastewater reuse. Using a laboratory-scale O3/BAC system treating two nitrified wastewater effluents, this study characterized the effect of different ozone dosages (0-1.0 mg O3/mg dissolved organic carbon) and BAC empty bed contact time...

Journal: :American journal of epidemiology 2007
Cristina M Villanueva Kenneth P Cantor Joan O Grimalt Nuria Malats Debra Silverman Adonina Tardon Reina Garcia-Closas Consol Serra Alfredo Carrato Gemma Castaño-Vinyals Ricard Marcos Nathaniel Rothman Francisco X Real Mustafa Dosemeci Manolis Kogevinas

Bladder cancer has been associated with exposure to chlorination by-products in drinking water, and experimental evidence suggests that exposure also occurs through inhalation and dermal absorption. The authors examined whether bladder cancer risk was associated with exposure to trihalomethanes (THMs) through ingestion of water and through inhalation and dermal absorption during showering, bath...

2004
Mark Van Loosdrecht H. C. Kim M. J. Yu G. N. Myung J. Y. Koo Y. H. Kim

A demonstration plant consisted of granular activated carbon (GAC) and ozone/GAC process was operated using filtered water of a conventional water treatment plant as influent to study feasibility of introducing advanced water treatment. Natural organic matter (NOM) from process waters at the demonstration plant was isolated into hydrophobic and hydrophilic fractions by physicochemical fractiona...

2015
Marie Pedersen Michelle A. Mendez Bernadette Schoket Roger W. Godschalk Ana Espinosa Anette Landström Cristina M. Villanueva Domenico F. Merlo Eleni Fthenou Esther Gracia-Lavedan Frederik-J. van Schooten Gerard Hoek Gunnar Brunborg Helle M. Meltzer Jan Alexander Jeanette K. Nielsen Jordi Sunyer John Wright Katalin Kovács Kees de Hoogh Kristine B. Gutzkow Laura J. Hardie Leda Chatzi Lisbeth E. Knudsen Lívia Anna Matthias Ketzel Margaretha Haugen Maria Botsivali Mark J. Nieuwenhuijsen Marta Cirach Mireille B. Toledano Rachel B. Smith Sarah Fleming Silvia Agramunt Soterios A. Kyrtopoulos Viktória Lukács Jos C. Kleinjans Dan Segerbäck Manolis Kogevinas

BACKGROUND Bulky DNA adducts reflect genotoxic exposures, have been associated with lower birth weight, and may predict cancer risk. OBJECTIVE We selected factors known or hypothesized to affect in utero adduct formation and repair and examined their associations with adduct levels in neonates. METHODS Pregnant women from Greece, Spain, England, Denmark, and Norway were recruited in 2006-20...

Journal: :AWWA water science 2023

Spray aeration is a comparatively low-cost option to reduce trihalomethane (THM) concentrations in distribution system storage. The effect of spray on unregulated, toxic disinfection by-products was investigated bench-scale apparatus closed-tank and open-tank experiments. In the experiments, initially over 90% THMs, trichloroacetonitrile, chloropicrin were removed, while 36% dihaloacetonitriles...

2016
D. Golea S. Sutherland P. Jarvis S. J. Judd

The outcomes of a pilot-scale study of the rejection of trihalomethanes (THMs) precursors by commercial ultrafiltration/nanofiltration (UF/NF) spiral-wound membrane elements are presented based on a single surface water source in Scotland. The study revealed the expected trend of increased flux and permeability with increasing pore size for the UF membranes; the NF membranes provided similar fl...

2005
V. KOLOVOYIANNIS S. GOLFINOPOULOS

The formation of chlorination by-products (CBPs) was investigated by bench-scale chlorination experiments with surface waters from different sources in Lesvos island, Greece. The main factors studied were organic matter content of water (expressed as UV-272 absorbance), time and chlorine dose. The CBPs, determined by gas chromatographic techniques, belong to the categories of trihalomethanes (T...

Journal: :Chemosphere 2016
Fatima Al-Otoum Mohammad A Al-Ghouti Talaat A Ahmed Mohammed Abu-Dieyeh Mohammed Ali

The occurrence of chlorine dioxide (ClO2) disinfection by-products (DBPs) in drinking water, namely, chlorite, chlorate, and trihalomethanes (THMs), was investigated. Two-hundred-ninety-four drinking water samples were collected from seven desalination plants (DPs), four reservoirs (R), and eight mosques (M) distributed within various locations in southern and northern Qatar. The ClO2 concentra...

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