Document Detail

Electrically induced reduction of trichloroethene in clay.
MedLine Citation:
PMID:  19729244     Owner:  NLM     Status:  MEDLINE    
Chlorinated compounds such as trichloroethene (TCE) are recalcitrant contaminants commonly detected in soil and groundwater. Contemporary remedies such as electron donor amendment tend to be less or ineffective in treating chlorinated compounds in matrix of lower permeability, such as clay. In this study, electrically induced reduction (EIR) was tested by inserting electrodes in saturated clay containing 122.49-125.43 mg TCE kg(-1). Weak electric potentials (E) of 6, 9, and 12 V m(-1) were applied, and up to 97% of TCE were depleted during the study period. Corresponding increases in chloride concentrations was observed during TCE depletion, indicating a reductive dechlorination pathway. No migration of TCE was observed between the two electrodes, neither were intermediate compounds such as dichloroethene (DCE) or vinyl chloride (VC). Results were also tested against a mathematical equation we previously established for field applications. Electrically induced reduction may offer a novel method for in situ degradation of chlorinated contaminants, especially in low-permeable media such as clay.
Song Jin; Paul H Fallgren
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2009-08-22
Journal Detail:
Title:  Journal of hazardous materials     Volume:  173     ISSN:  1873-3336     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2009-11-27     Completed Date:  2010-02-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  200-4     Citation Subset:  IM    
School of Resources and Environment, Hefei University of Technology, Hefei, PR China.
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MeSH Terms
Aluminum Silicates / chemistry*
Hydrogen-Ion Concentration
Soil / analysis
Trichloroethylene / chemistry*
Vinyl Chloride / chemistry
Reg. No./Substance:
0/Aluminum Silicates; 0/Soil; 1302-87-0/clay; 75-01-4/Vinyl Chloride; 79-01-6/Trichloroethylene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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