caa a22 4500 475815734 CHVBK 20180406123809.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1003994428571 doi (NATIONALLICENCE)springer-10.1023/A:1003994428571 Oturan M.A. Laboratoire d'Electrochimie Moléculaire, UMR-CNRS N∘ 7591, Université Paris 7 (Denis Diderot), 2 place Jussieu, 75251, Paris Cedex 05, France aut An ecologically effective water treatment technique using electrochemically generated hydroxyl radicals for in situ destruction of organic pollutants: Application to herbicide 2,4-D [Elektronische Daten] [M.A. Oturan] The electrochemical production of Fenton's reagent by simultaneous reduction of dioxygen and ferric ions on a carbon felt electrode, permits a controlled, in situ generation of hydroxyl (OH·) radicals. The possibility of using electrochemically produced OH⋅ radicals for solving environmental problems is investigated. Continuous and controlled production of hydroxyl radicals was achieved by electrochemical reduction of O2 in the presence of a catalytic amount of ferric or ferrous ion. These radicals are used for remediation of water containing toxic-persistent-bioaccumulative organic pollutants through their transformation into biodegradable compounds or through their mineralization into H2O and CO2. A widely used herbicide, 2,4-dichlorophenoxyacetic acid (2,4-D), was selected as a model for a toxic organic pollutant. High pressure liquid chromatography (HPLC) was used to quantify the distribution of the hydroxylated products obtained. Rate constants for the hydroxylation reactions of 2,4-D, 2,4-dichlorophenol (2,4-DCP), 2,4-dichlororesorcinol (2,4-DCR) and 4,6-dichlororesorcinol (4,6-DCR) were determined. The mineralization of 2,4-D and its derivatives was followed by total organic carbon (TOC) measurements. More than 95% of 2,4-D and the intermediates generated during the electrolysis can be mineralized. Kluwer Academic Publishers, 2000 2,4-dichlorophenoxyacetic acid (2,4-D) nationallicence Fenton's reagent nationallicence hydrogen peroxide nationallicence hydroxyl radical nationallicence total organic carbon (TOC) nationallicence water treatment nationallicence Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 475-482 0021-891X 30:4<475 2000 30 10800 https://doi.org/10.1023/A:1003994428571 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003994428571 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Oturan M.A. Laboratoire d'Electrochimie Moléculaire, UMR-CNRS N∘ 7591, Université Paris 7 (Denis Diderot), 2 place Jussieu, 75251, Paris Cedex 05, France aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 475-482 0021-891X 30:4<475 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer