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Reductive Dechlorination of Chlorophenols by Palladized Iron  

Kim, Young-Hun (Department of Environmental Engineering, KyungPook National University)
Abstract
Palladium coated iron (Pd/Fe), a bimetal, was investigated for its potential to degrade less chlorophenols. Catalytically modified zero valent iron (Pd/Fe) was prepared by reductive adsorption of the secondary metal on iron and tested as reductant. The results showed that Pd/Fe rapidly degraded three monochlorophenols and two dichlorphenols. Phenol and cyclohexane were detected as daughter products. Based on the mass balance, the degradation turned out mainly dechlorination. In the kinetic study, the reaction rate was in order of 4-CP > 3-CP > 2-CP>2,30DCP > 2,4-DCP. The higher degradation rate for less chlorinated phenol agreed with the result of previous studies for chloroethenes. The degradation rate was proportional to the metal surface area. The degradation pathaways were also discussed
Keywords
Reductive Dechlorination; Zero Valent Metals; Chlorophenols; Reduction; Regioselectivity; Permeable Reactive Barriers;
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