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KMID : 1024520030120020201
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Journal of the Environmental Sciences
2003 Volume.12 No. 2 p.201 ~ p.205
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Development of Activity Enhanced Zero Valent Metals for Permeable Reactive Barrier
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Kim Young-Hun
Kim Myung-Chul
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Abstract
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The dechlorination of chlorinated methanes by iron powder and palladium coated iron (Pd/Fe) was studied in batch experiments. Iron powder dechlorinated carbon tetrachloride (CT) with a half-life of 4 days. Three chloromethane was found as major product and less chlorinated daughters. Mass balance found was to be about 93-99%. Pd/Fe showed very enhanced reactivity for CT in comparing with plain iron. The major dechlorination products of CT were also less chlorinated methanes with Pd/Fe. Pd/Fe also degrade the produced less chlorinated compounds. Sequential reactions were occurred on Pd/Fe. As the Pd/Fe content increased, the reaction rate was increased linearly.
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KEYWORD
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Zero-Valent Metals, Reduction, Dechlorination, Carbon tetrachloride, Palladium
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