Reductive Dechlorination of Chlorinated Hydrocarbons in Water by Cu/Fe Bimetallic Reductant

The influence of Cu on the dechlorination rate of various chlorinated hydrocarbons including CF, CT, 1,1,2,2-TeCA, 1,1,2,2-TeCA and HCA by Fe 0 and Cu/Fe was investigated in batch experiments. All organohalides can be dechlorinated rapidly by Fe or Cu/Fe in aqueous system and the contaminants were d...

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Bibliographic Details
Main Authors: Wu, De-Li, Wang, Hong-Wu, Fan, Jing-Hong, Ma, Lu-Ming
Format: Conference Proceeding
Language:English
Subjects:
Chemicals
Copper
Degradation
Hydrocarbons
Iron
Kinetic theory
Laboratories
Pollution control
Water pollution
Water resources
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Summary:The influence of Cu on the dechlorination rate of various chlorinated hydrocarbons including CF, CT, 1,1,2,2-TeCA, 1,1,2,2-TeCA and HCA by Fe 0 and Cu/Fe was investigated in batch experiments. All organohalides can be dechlorinated rapidly by Fe or Cu/Fe in aqueous system and the contaminants were degraded via sequential reductive dechlorination to form less chlorinated homologues. The removal of CF, CT, 1,1,1-TCA, 1,1,2,2-TeCA and HCA followed pseudo-first-order kinetics both in Fe 0 system and Cu/Fe system. Cu/Fe reductant could enhance the dechlorination rate of all chlorinated hydrocarbons.The degradation rate constant of a general dechlorination was increased by a factor of 3 in Cu/Fe system than that in Fe 0 system. The intermediate products of dechlorination and the major pathway were summarized in this study. Hydrogenolysis and reductive elimination was the dominant reaction for various chlorinated hydrocarbons dechlorination by Cu/Fe with respect to the products.
ISSN:2151-7614
2151-7622
DOI:10.1109/ICBBE.2008.254