Complete dissolution of trichloroethylene in saturated porous media
Article Abstract:
No long tails in effluent concentration data for tricholoroethylene (TCE) dissolution from porous media. Rather, as effluent concentrations decreased to small values, the tails examined were due to contaminated influent water, desorption from Teflon column plungers, or desorption from the porous medium. The research discussed porous media containing TCE trapped at residual saturation in otherwise water-saturated porous media that were rinsed with water to examine the dissolution rate of TCE as TCE volumetric fraction approached zero. Effluent concentration measurements during TCE dissolution are presented for a glass bead porous medium, a mixed sand, and a treated soil.
Comment:
No long tails in effluent concentration data for tricholoroethylene dissolution from porous media
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Transformation of hexachloroethane in a sulfidic natural water
Article Abstract:
Hydrogen sulfide and polysulfides are potential environmental reductants in sulfidic natural waters with samples taken from the anoxic hypolimnion of Lower Mystic Lake, MA. Abiotic dehydrohalogenation is attributed for the 80% reaction yielded by pentachloroethane, while an additional 9% is due to abiotic reductive elimination to trichloroethylene. Reactions of hexachloroethane, however, were mostly abiotic. Reactions of at least 61% were obtained from reduction elimination to tetrachloroethylene with 7% to 10% involving in hydrogenolysis to pentacholoethane. A disappearance for over 20% of hexachloroethane was seen in filter-sterilized samples.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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