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Degradation of chlorophenoxyacid herbicides in aqueous media, using a novel electrochemical method†

✍ Scribed by Oturan, Mehmet A; Aaron, Jean-Jacques; Oturan, Nihal; Pinson, Jean

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 81 KB
Volume: 55
Category: Article
ISSN: 1526-498X
DOI: 10.1002/(sici)1096-9063(199905)55:5<558::aid-ps968>3.0.co;2-h

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✦ Synopsis

The degradation of ®ve chlorophenoxyacid herbicides has been studied using an electrochemical method based on the Fenton reaction (simultaneous reduction of dioxygen and ferric ions). The method consists of electrosynthesizing OH Á radicals, which react rapidly with chlorophenoxyacids in aqueous media. HPLC and GC-MS analysis show the formation of polyhydroxyphenols and quinones in a ®rst step, and the complete destruction of the aromatic nucleus upon exhaustive electrolysis. This offers a possible way for the depollution of natural waters containing chlorophenoxyacid pesticide residues.

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