Electrochemical remediation of trichloroethene-contaminated groundwater using palladized iron oxides.
The objective of this study is to develop electrochemically-enhanced dechlorination of trichloroethene (TCE) using palladized iron oxides minerals for ex situ remediation of contaminated groundwaters. A bench-scale column packed with the palladized iron oxide media connected to a cathode and an anode embedded in a carbon pad was prepared for flow through column tests. Contaminated groundwaters with about 14-16 mg/L TCE were passed from the cathode side to the anode side of the column while the system was supplied with direct current. All of the TCE in the groundwater was dechlorinated even after 300 pore volumes were passed. Furthermore, intermediate reaction products, dichloroethene isomers and vinyl chloride, were not detected in the treated water.
Roh
Y
Y
Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6038, USA. rohy@ornl.gov
Cho
K S
KS
Lee
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S
D004563:Electrochemistry; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D012997:Solvents / Q000737:chemistry*; D014241:Trichloroethylene / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000517:prevention & control
D005290:Ferric Compounds; D012989:Soil Pollutants; D012997:Solvents; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D014241:Trichloroethylene; D010165:Palladium