Dechlorination of pentachloroethane by commercial Fe and ferruginous smectite |
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Authors: | Cervini-Silva Javiera Larson Richard A Wu Jun Stucki Joseph W |
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Affiliation: | Department of Environmental Science, Policy and Management, University of California, Berkeley 94720-3110, USA. jcervini@nature.berkeley.edu |
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Abstract: | 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. |
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