Lee, W 2024-01-21T06:31:21Z 2024-01-21T06:31:21Z 2021-09-01 2004-09-10 0304-3894 https://pubs.kist.re.kr/handle/201004/137234 A continuous soil column experiment was conducted to investigate reductive dechlorination of trichloroethylene (TCE) in soil system reductively manipulated by three types of reductants (Fe(II), dithionite, and Fe(II) + dithionite (combined treatment of Fe(II) and dithionite)). The soil column reduced by Fe(II) + dithionite has the greatest bed volumes (51.8) treated to breakthrough indicating that the combined treatment of Fe(II) and dithionite is more effective for the reductive dechlorination of TCE in the reduced soil column than the separate treatment of Fe(II) or dithionite. The measured bed volumes to breakthrough in control and treated soil columns were similar to the estimated bed volumes based on the result of batch kinetic experiment, differing by a factor of 0.96-1.02. The relative concentration of bromide (nonreactive tracer) reached the approximate value of 1 between 0.87 and 1.03 bed volume. C-2 hydrocarbons (acetylene, ethylene, and ethane) were observed as transformation products in the effluents of soil columns treated by the reductants. However, no chlorinated intermediates were observed at the concentrations above detection limits throughout the experiment. Chloride was observed in the effluents of soil columns reduced by dithionite and Fe(II) + dithionite. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER HENRYS LAW CONSTANTS REDUCTIVE DECHLORINATION CHLORINATED ETHYLENES MINERALS Removal of trichloroethylene in reduced soil columns Article 10.1016/j.jhazmat.2004.06.027 1 JOURNAL OF HAZARDOUS MATERIALS, v.113, no.1-3, pp.175 - 180 JOURNAL OF HAZARDOUS MATERIALS 113 1-3 175 180 scie scopus 000224159100020 2-s2.0-4544326118 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article HENRYS LAW CONSTANTS REDUCTIVE DECHLORINATION CHLORINATED ETHYLENES MINERALS redox manipulation reductive dechlorination reduced soil trichloroethylene groundwater remediation