TY - JOUR
T1 - Kinetics of trichloroethene dechlorination with iron powder
AU - Hara, Junko
AU - Ito, Hiroyuki
AU - Suto, Koichi
AU - Inoue, Chihiro
AU - Chida, Tadashi
N1 - Funding Information:
This work was financially supported by the Japan Society for the Promotion of Science ((A) (2)14205150). This work would not have been possible without the help of Takayuki Ooshita (Miyama Co. Ltd.) in the experiments involving the degradation of Trichloroethene using zero-valent iron.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2005/3
Y1 - 2005/3
N2 - The dechlorination of trichloroethene (TCE) with metallic iron is an advantageous method for the remediation of contaminated groundwater and soil. The toxic reaction intermediates such as dichloroethenes (DCEs) and vinyl chloride (VC), however, occasionally accumulate in the pathway of the reaction. We have been trying to suppress these intermediates by using metallic iron powder containing impurities. In order to investigate the reaction pathways, we measured the production rates of the intermediates and the final products of the dechlorination of TCE such as DCEs, VC, ethyne or ethene. Ethyne, ethene, ethane and cis-DCE were observed as the major products, and trans-DCE, 1,1-DCE, VC, C3-hydrocarbons (such as propane, propylene), C 4-hydrocarbons (such as n-butane) and methane were observed as the minors. Also the rate constants of TCE to ethyne and ethyne to ethene were larger than any other constants. These fact show the production of ethene/ethane via ethyne is the main pathway of the dechlorination of TCE using the metallic iron powder.
AB - The dechlorination of trichloroethene (TCE) with metallic iron is an advantageous method for the remediation of contaminated groundwater and soil. The toxic reaction intermediates such as dichloroethenes (DCEs) and vinyl chloride (VC), however, occasionally accumulate in the pathway of the reaction. We have been trying to suppress these intermediates by using metallic iron powder containing impurities. In order to investigate the reaction pathways, we measured the production rates of the intermediates and the final products of the dechlorination of TCE such as DCEs, VC, ethyne or ethene. Ethyne, ethene, ethane and cis-DCE were observed as the major products, and trans-DCE, 1,1-DCE, VC, C3-hydrocarbons (such as propane, propylene), C 4-hydrocarbons (such as n-butane) and methane were observed as the minors. Also the rate constants of TCE to ethyne and ethyne to ethene were larger than any other constants. These fact show the production of ethene/ethane via ethyne is the main pathway of the dechlorination of TCE using the metallic iron powder.
KW - Dechlorination
KW - Hydrogenation
KW - Iron powder
KW - Kinetics
KW - Trichloroethene
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U2 - 10.1016/j.watres.2004.12.011
DO - 10.1016/j.watres.2004.12.011
M3 - Article
C2 - 15766971
AN - SCOPUS:17744387133
VL - 39
SP - 1165
EP - 1173
JO - Water Research
JF - Water Research
SN - 0043-1354
IS - 6
ER -