Rapid total destruction of chlorophenols by activated hydrogen peroxide |
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Authors: | Gupta Sayam Sen Stadler Matthew Noser Christopher A Ghosh Anindya Steinhoff Bradley Lenoir Dieter Horwitz Colin P Schramm Karl-Werner Collins Terrence J |
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Institution: | Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA. |
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Abstract: | A practical, inexpensive, green chemical process for degrading environmental pollutants is greatly needed, especially for persistent chlorinated pollutants. Here we describe the activation of hydrogen peroxide by tetraamidomacrocylic ligand (TAML) iron catalysts, to destroy the priority pollutants pentachlorophenol (PCP) and 2,4,6-trichlorophenol (TCP). In water, in minutes, under ambient conditions of temperature and pressure, PCP and TCP are completely destroyed at catalyst:substrate ratios of 1:715 and 1:2000, respectively. The fate of about 90% of the carbon and about 99% of the chlorine has been determined in each case. Neither dioxins nor any other toxic compounds are detectable products, and the catalysts themselves show low toxicity. |
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