title: Rapid total destruction of chlorophenols by activated hydrogen peroxide.
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.
authors.affiliation: Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
authors.forename: Sayam Sen
authors.initials: SS
authors.lastname: Gupta
authors.forename: Matthew
authors.initials: M
authors.lastname: Stadler
authors.forename: Christopher A
authors.initials: CA
authors.lastname: Noser
authors.forename: Anindya
authors.initials: A
authors.lastname: Ghosh
authors.forename: Bradley
authors.initials: B
authors.lastname: Steinhoff
authors.forename: Dieter
authors.initials: D
authors.lastname: Lenoir
authors.forename: Colin P
authors.initials: CP
authors.lastname: Horwitz
authors.forename: Karl-Werner
authors.initials: KW
authors.lastname: Schramm
authors.forename: Terrence J
authors.initials: TJ
authors.lastname: Collins
mesh_terms: D002384:Catalysis; D017606:Chlorine Compounds / Q000737:chemistry; D002733:Chlorophenols / Q000737:chemistry*; D004147:Dioxins / Q000737:chemistry; D004785:Environmental Pollutants; D005290:Ferric Compounds / Q000737:chemistry* / Q000633:toxicity; D008401:Gas Chromatography-Mass Spectrometry; D006576:Heterocyclic Compounds, 4 or More Rings / Q000737:chemistry* / Q000633:toxicity; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D010084:Oxidation-Reduction; D010416:Pentachlorophenol / Q000737:chemistry*; D011312:Pressure; D021241:Spectrometry, Mass, Electrospray Ionization; D013696:Temperature
chemical_list: D017606:Chlorine Compounds; D002733:Chlorophenols; D004147:Dioxins; D004785:Environmental Pollutants; D005290:Ferric Compounds; D006576:Heterocyclic Compounds, 4 or More Rings; D006861:Hydrogen Peroxide; D010416:Pentachlorophenol; C024564:2,4,6-trichlorophenol