Dechlorination of pentachloroethane by commercial Fe and ferruginous smectite.
Short-term experiments were conducted to investigate the effect of a commercial Fe and an iron-bearing clay mineral, ferruginuous smectite (SWa-1), on the degradation of pentachloroethane (PCA). After 3 h of contact time, SWa-1 catalyzed PCA dehydrochlorination to tetrachloroethene (PCE, 65% conversion), whereas commercial Fe promoted PCA stepwise dechlorination via dehydrochlorination (approximately 40% conversion) and subsequent PCE hydrogenolysis to trichloroethene (TCE). The addition of unaltered SWa-1 to commercial Fe led to a complete inhibition on TCE production, whereas the addition of reduced SWa-1 barely resulted in a 30% decrease.
Department of Environmental Science, Policy and Management, University of California, Berkeley 94720-3110, USA. jcervini@nature.berkeley.edu
Javiera
J
Cervini-Silva
Richard A
RA
Larson
Jun
J
Wu
Joseph W
JW
Stucki
D002713:Chlorine / Q000737:chemistry*; D004980:Ethane / Q000031:analogs & derivatives* / Q000737:chemistry*; D005765:Gastrointestinal Agents / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D017640:Silicates; D012989:Soil Pollutants / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification / Q000379:methods
D005765:Gastrointestinal Agents; D006843:Hydrocarbons, Chlorinated; D017640:Silicates; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D002713:Chlorine; C033214:Smectite; D007501:Iron; D004980:Ethane; C016036:pentachloroethane