Results 121 to 130 of about 938 (174)

Airborne Haloacetic Acids

Environmental Science & Technology, 2003
Haloacetic acid (HAA) concentrations were measured in air samples from a semi-rural and a highly urbanized site in southern Ontario throughout 2000 to investigate their sources and gas-particle partitioning behavior. Denuders were efficient for collection of gaseous HAAs, and the particle phase was collected on a downstream quartz filter with ...
Jonathan W, Martin, Scott A, Mabury, Charles S, Wong, Francis, Noventa, Keith R, Solomon, Mehran, Alaee, Derek C G, Muir   +6 more
openaire   +2 more sources

Removal of haloacetic acids by nanofiltration

Journal of Environmental Sciences, 2009
Haloacetic acids, disinfection byproducts (DBPs) formed during drinking water chlorination process are carcinogens. The efficacy of nanofiltration (NF) was examined for the removal of five regulated haloacetic acids (HAA5): chloro-, dichloro-, and trichloro-acetic acid (CAA, DCAA, and TCAA); bromo-, and dibromo-acetic acid (BAA, and DBAA) in synthetic ...
Ratasuk, Chalatip, Ratanatamskul, Chawalit, Ratasuk, Nopawan   +2 more
openaire   +2 more sources

Photodegradation of haloacetic acids in water

Chemosphere, 2004
The global distribution and high stability of some haloacetic acids (HAAs) has prompted concern that they will tend to accumulate in surface waters and pose threats to humans and the ecosystem. It is important to study the degradation pathways of HAAs in aqueous systems to understand their ecotoxicological effects.
Lifongo, Lydia L., Bowden, Derek J., Brimblecombe, Peter   +2 more
openaire   +3 more sources

Haloacetic acids, phytotoxic secondary air pollutants

Environmental Science and Pollution Research, 1994
Haloacetic acids are atmospheric oxidation products of airborne C2-halocarbons which are important solvents and propellants. Levels of trichloroacetate (TCA) in conifer needles from mountain ranges in Germany (Black Forest, Erzgebirge) and from two sites in Finland are compared; TCA is present in conifer needles at concentrations up to 0.7 μmol/kg, MCA
Frank, H., Scholl, H., Renschen, D., Rether, B., Laouedj, A., Norokorpi, Y.   +5 more
openaire   +2 more sources

Origin of haloacetic acids in milk and dairy products

Food Chemistry, 2016
Haloacetic acids (HAAs) are formed during the process of water disinfection. Therefore their presence in foods can be correlated with the addition of or contact with treated water. To determine the origin of HAAs in milk and dairy products, firstly a chromatographic method was developed for their determination.
Maria Jose, Cardador, Mercedes, Gallego
openaire   +2 more sources

Kinetics of Haloacetic Acid Reactions with Fe(0)

Environmental Science & Technology, 2004
Detailed kinetic studies of the reactions of haloacetic acids (HAAs) with Fe(0) were performed in longitudinally mixed batch reactors. The reactions of tribromoacetic acid (TBAA), bromodichloroacetic acid, and chlorodibromoacetic acid were mass transfer limited, with corrected mass transfer coefficients of 3.7-3.9 x 10(-4) m/s.
Li, Zhang, William A, Arnold, Raymond M, Hozalski   +2 more
openaire   +2 more sources

Characterization of haloacetic acid precursors in source water

Journal of Environmental Management, 2006
Raw water from the Bangkok (Thailand) main municipal water supply canal was examined for its natural organic composition by fractionation with adsorption resins. DAX-8 resin was the first resin employed to fractionate the hydrophobic fractions. Fractionation at neutral pH resulted in the separation of the hydrophobic neutral components; at a high pH ...
Vorapot, Kanokkantapong, Taha F, Marhaba, Prasert, Pavasant, Bunyarit, Panyapinyophol   +3 more
openaire   +2 more sources

Optimizing the determination of haloacetic acids in drinking waters

Journal of Chromatography A, 2004
Three methods are currently approved by the US Environmental Protection Agency for the compliance monitoring of haloacetic acids in drinking waters. Each derivatizes the acids to their corresponding esters using either acidic methanol or diazomethane. This study was undertaken to characterize the extent of methylation of these analytes by these methods,
Mark M, Domino, Barry V, Pepich, David J, Munch, Patricia S, Fair   +3 more
openaire   +2 more sources

Percutaneous Absorption of Trihalomethanes, Haloacetic Acids, and Haloketones

Toxicology and Applied Pharmacology, 2002
Bathing in chlorinated drinking water causes significant exposure to potentially toxic disinfection by-products (DBPs). In the present studies, we measured the permeation coefficients (K(p)) of three important classes of DBPs, trihalomethanes (THMs), haloketones (HKs), and haloacetic acids (HAAs), in aqueous solution across human skin using in vitro ...
Xu, Xu, Thomas M, Mariano, Jeffrey D, Laskin, Clifford P, Weisel   +3 more
openaire   +2 more sources

Biodegradation of haloacetic acids by bacterial enrichment cultures

Chemosphere, 2004
Haloacetic acids (HAAs) are toxic organic chemicals that are frequently detected in surface waters and in drinking water distribution systems. The aerobic biodegradation of HAAs was investigated in serum bottles containing a single HAA and inoculated with washed microorganisms obtained from enrichment cultures maintained on either monochloroacetic acid
Bethany M, McRae, Timothy M, LaPara, Raymond M, Hozalski   +2 more
openaire   +2 more sources