Publication Date:
2002-04-16
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gupta, Sayam Sen -- Stadler, Matthew -- Noser, Christopher A -- Ghosh, Anindya -- Steinhoff, Bradley -- Lenoir, Dieter -- Horwitz, Colin P -- Schramm, Karl-Werner -- Collins, Terrence J -- GM44867-05/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2002 Apr 12;296(5566):326-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11951040" target="_blank"〉PubMed〈/a〉
Keywords:
Catalysis
;
Chlorine Compounds/chemistry
;
Chlorophenols/*chemistry
;
Dioxins/chemistry
;
Environmental Pollutants
;
Ferric Compounds/*chemistry/toxicity
;
Gas Chromatography-Mass Spectrometry
;
Heterocyclic Compounds with 4 or More Rings/*chemistry/toxicity
;
Hydrogen Peroxide/*chemistry
;
Hydrogen-Ion Concentration
;
Kinetics
;
Magnetic Resonance Spectroscopy
;
Oxidation-Reduction
;
Pentachlorophenol/*chemistry
;
Pressure
;
Spectrometry, Mass, Electrospray Ionization
;
Temperature
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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