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Degradation of chlorinated phenols in water in the presence of H2O2 and water-soluble μ-nitrido diiron phthalocyanine

Paper ID Volume ID Publish Year Pages File Format Full-Text
54672 47020 2014 6 PDF Available
Title
Degradation of chlorinated phenols in water in the presence of H2O2 and water-soluble μ-nitrido diiron phthalocyanine
Abstract

•μ-Nitrido diiron phthalocyanine is a better catalyst for the oxidative degradation of chlorinated phenols than mononuclear complex.•Almost complete conversion of 2,6-dichlorophenol and total organic carbon removal up to 43% was obtained.•Diiron and iron catalysts operate according to different mechanisms.•Mechanism of the cleavage of aromatic cycle and mineralization is proposed.

Efficient disposal of pollutants is a key problem in the environmental context. In particular, chlorinated aromatic compounds are recalcitrant to biodegradation and conventional treatment methods. Iron phthalocyanines were previously shown to be efficient catalysts for the oxidative degradation of chlorinated phenols considered as priority pollutants. We have recently discovered μ-nitrido diiron phthalocyanines as powerful oxidation catalysts. Herein, we evaluate these emerging catalysts in the oxidation of chlorinated phenols in comparison with conventional mononuclear complex. Catalytic performance of iron tetrasulfophthalocyanine (FePcS) and corresponding μ-nitrido dimer [(FePcS)2N] have been compared in the oxidation of chlorinated phenols by hydrogen peroxide in water. The oxidative degradation of 2,6-dichlorophenol (DCP) and 2,4,6-trichlorophenol (TCP) has been studied. The (FePcS)2N exhibited better catalytic properties than mononuclear FePcS in terms of conversion and mineralization (transformation of organic chlorine to Cl− and decrease of total organic carbon due to the formation of CO2). Kinetics of the DCP oxidation indicated that different reaction mechanisms are involved in the presence of FePcS and (FePcS)2N. The high catalytic activity of (FePcS)2N in the degradation and mineralization of chlorinated phenols make μ-nitrido diiron phthalocyanines promising catalyst to apply also in environmental remediation.

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Keywords
Chlorinated phenols; Depollution; Oxidation; Catalysis; Phthalocyanine; μ-Nitrido dimer
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Degradation of chlorinated phenols in water in the presence of H2O2 and water-soluble μ-nitrido diiron phthalocyanine
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 235, 15 October 2014, Pages 14–19
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us