Electrochemical incineration of dimethyl phthalate by anodic oxidation with boron-doped diamond electrode

作     者：HOU Yining QU Jiuhui ZHAO Xu LIU Huijuan 

作者机构：State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2009年第21卷第10期

页      面：1321-1328页

核心收录：

学科分类：090403[农学-农药学(可授农学、理学学位）] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 09[农学] 0904[农学-植物保护] 

基　　金：supported by the National Natural Science Foundation of China (No 50778172) the Funds for Creative Research Groups of China (No 50621804) 

主　　题：dimethyl phthalate anodic oxidation boron-doped diamond mineralization 

摘      要：The anodic oxidation of aqueous solutions containing dimethyl phthalate （DMP） up to 125 mg/L with sodium sulfate （Na2SO4） as supporting electrolyte within the pH range 2.0-10.0 was studied using a one-compartment batch reactor employing a boron-doped diamond （BDD） as anode. Electrolyses were carded out at constant current density （1.5-4.5 mA/cm^2）. Complete mineralization was always achieved owing to the great concentration of hydroxyl radical （-OH） generated at the BDD surface. The effects of pH, apparent current density and initial DMP concentration on the degradation rate of DMP, the specific charge required for its total mineralization and mineralization current efficiency were investigated systematically. The mineralization rate of DMP was found to be pH-independent and to increase with increasing applied current density. Results indicated that this electrochemical process was subjected, at least partially, to the mass transfer of organics onto the BDD surface. Kinetic analysis of the temporal change of DMP concentration during electrolysis determined by High Performance Liquid Chromatography （HPLC） revealed that DMP decay under all tested conditions followed a pseudo first-order reaction. Aromatic intermediates and generated carboxylic acids were identified by Gas Chromatography- Mass Spectrometry （GC-MS） and a general pathway for the electrochemical incineration of DMP on BDD was proposed.