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題 名 | Electrochemical Oxidation of 2-Nitrophenol in Aqueous Medium by Electro-Fenton Technology |
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作 者 | Ammar, Salah; Oturan, Nihal; Oturan, Mehmet A.; | 書刊名 | Journal of Environmental Engineering and Management |
卷 期 | 17:2 2007.03[民96.03] |
頁 次 | 頁89-96 |
分類號 | 445.46 |
關鍵詞 | 2-nitrophenol; Water treatment; Electro-Fenton process; Carbon felt cathode; Mineralization; |
語 文 | 英文(English) |
英文摘要 | The oxidative degradation of aqueous 2-nitrophenol (2-NP) solutions at pH3 has been studied in a non divided electrochemical cell by indirect electrochemical oxidation technique using electro-Fenton process. Hydroxyl radical, a very powerful oxidizing agent, was produced from Fenton’s reagent (□+□□) in a catalytic way under current controlled electrolyses conditions on a carbon felt electrode as cathode. This environmentally friendly treatment technique allows to efficiently decontaminate aqueous solutions polluted by 2-NP. In situ generated hydroxyl radical lead to the degradation of 2-NP until its total mineralization. The degradation rate and mineralization efficiency increase with applied current. The reaction kinetics follow a pseudo-first order reaction. Catechol, resorcinol, 1,2,4-trihydroxybenzene, hydroquinone and benzoquinone were detected as aromatic reaction intermediates. Malonic, glyoxilic and oxalic acids were detected as aromatic reaction intermediates. Malonic, glyoxilic and oxalic acids were identified as ultimate end-products before complete mineralization. The initial organic nitrogen was converted in to N□ and N□ ions. |
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