Dechlorination of Hexachlorobenzene by Zero-Valent Iron
Publication: Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 8, Issue 2
Abstract
Chemical reduction of hexachlorobenzene (HCB) by metallic iron was investigated. Since the percentage of HCB transformation is almost the same as that of chloride ion production, no chlorinated intermediates in the solution was formed during the reduction reaction. The solution pH went to around 8.0 even though the initial pH was 10 or lowered to 3. The reaction is pseudofirst order with respect to HCB concentration. The optimum dosage of iron particles for the dechlorination of HCB varies with the HCB concentration. For example, when the initial concentration of HCB was the highest transformation rate of HCB occurred with using at 350 g/L of iron particles; the optimum dosage shifted to around 500 g/L when the HBC concentration was
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Copyright © 2004 American Society of Civil Engineers.
History
Received: Mar 15, 2003
Accepted: Mar 15, 2003
Published online: Mar 15, 2004
Published in print: Apr 2004
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