Lee, W Batchelor, B 2024-01-21T09:36:46Z 2024-01-21T09:36:46Z 2021-09-01 2002-12-15 0013-936X https://pubs.kist.re.kr/handle/201004/138963 Abiotic reductive dechlorination of chlorinated ethylenes by the sulfate form of green rust (GR(SO4)) was examined in batch reactors. Dechlorination kinetics were described by a modified Langmuir-Hinshelwood model. The rate constant for reductive dechlorination of chlorinated ethylenes at reactive GR(SO4) surfaces,was' in the range of 0.592 (+/- 4.4%) to 1.59 (+/- 6.3%) day(-1). The specific reductive capacity of GR(SO4) for target organics was in the range of 9.86 (+/- 10.1%) to 18.0.(+/- 4.3%) muM/g and sorption coefficient was in the range of 0.53 (+/- 2.46/6) to 1.22 (+/- 4.3%) mM(-1). Surface area-normalized pseudo-first-order initial rate constants for chlorinated ethylenes by GR(SO4) were 3.4 to 8.2 times greater than those by pyrite. Chlorinated ethylenes were mainly transformed to acetylene, and no detectable amounts of chlorinated intermediates were observed The rate constants for the reductive dechlorination of trichloroethylene (TCE) increased as pH increased (6.8 to 10.1) but were independent of solid concentration and initial TCE concentration. Magnetite and/ or maghemite were produced by the oxidation of GR(SO4) by TCE. These findings are. relevant to the understanding of the role of abiotic reductive dechlorination during natural attenuation in environments that contain GR(SO4). English AMER CHEMICAL SOC HOMOGENEOUS AQUEOUS-SOLUTION CARBON-TETRACHLORIDE MEDIATED REDUCTION ACETYLENE REACTION KINETICS SULFIDE TETRACHLOROETHYLENE TRANSFORMATION TRICHLOROETHYLENE PATHWAYS Abiotic, reductive dechlorination of chlorinated ethylenes by iron-bearing soil minerals. 2. Green rust Article 10.1021/es0258374 1 ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.36, no.24, pp.5348 - 5354 ENVIRONMENTAL SCIENCE & TECHNOLOGY 36 24 5348 5354 scie scopus 000179833400010 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article HOMOGENEOUS AQUEOUS-SOLUTION CARBON-TETRACHLORIDE MEDIATED REDUCTION ACETYLENE REACTION KINETICS SULFIDE TETRACHLOROETHYLENE TRANSFORMATION TRICHLOROETHYLENE PATHWAYS Reductive dechlorination