title: [Studies on the degradation of paracetamol in sono-electrochemical oxidation].
abstract: A novel lead dioxide electrodes co-doped with rare earth and polytetrafluoroethylene (PTFE) were prepared by the electrode position method and applied as anodes in sono-electrochemical oxidation for pharmaceutical wastewater degradation. The results showed that the APAP removal and the mineralization efficiency reached an obvious increase, which meant that the catalytic efficiency showed a significant improvement in the use of rare-earth doped electrode. The effects of process factors showed that the condition of the electrode had the best degradation efficiency with doped with Ce2O3 under electrolyte concentration of 14.2 g x L(-1), 49.58 W x cm(-2), 50 Hz, pH = 3, 71.43 mA x cm(-2). The APAP of 500 mg x L(-1) removal rate reached 92.20% and its COD and TOC values declined to 79.95% and 58.04%, the current efficiency reached 45.83% after degradation process for 2.0 h. The intermediates were monitored by the methods of GC-MS, HPLC, and IC. The main intermediates of APAP were p-benzoquinone, benzoic acid, acetic acid, maleic acid, oxalic acid, formic acid etc, and the final products were carbon dioxide and water. The goal of completely degradation of pollutant was achieved and a possible degradation way was proposed.
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China. dqz@zjut.edu.cn
authors.forename: Qi-Zhou
authors.initials: QZ
authors.lastname: Dai
authors.forename: Wen-Jiao
authors.initials: WJ
authors.lastname: Ma
authors.forename: Hong
authors.initials: H
authors.lastname: Shen
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Jian-Meng
authors.initials: JM
authors.lastname: Chen
mesh_terms: D000082:Acetaminophen / Q000737:chemistry / Q000302:isolation & purification*; D002384:Catalysis; D004345:Drug Industry; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D007854:Lead / Q000737:chemistry; D008567:Membranes, Artificial; D008674:Metals, Rare Earth / Q000737:chemistry; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D011138:Polytetrafluoroethylene / Q000737:chemistry; D013016:Sound; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry
chemical_list: D000082:Acetaminophen; D007854:Lead; D008567:Membranes, Artificial; D008674:Metals, Rare Earth; D010087:Oxides; D011138:Polytetrafluoroethylene; D062065:Wastewater; C047365:lead oxide