声电氧化处理扑热息痛的研究  

Studies on the Degradation of Paracetamol in Sono-electrochemical Oxidation

作　　者：戴启洲[1] 马文姣[1] 沈宏[1] 陈浚[1] 陈建孟[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,杭州310032

出　　处：《环境科学》2012年第7期2410-2418,共9页Environmental Science

基　　金：浙江省重点科技创新团队项目(2011R09048-04);高等学校博士学科点专项科研基金项目(20113317120004);浙江省自然科学基金项目(Y5090272);国家科技支撑计划项目(2011BAE07B09)

摘　　要：采用电沉积法制备了新型稀土和氟树脂共掺杂二氧化铅电极,并用于声电氧化体系处理扑热息痛(APAP)废水.结果表明,采用稀土掺杂电极后,APAP的去除效率及矿化效率大幅度增加,显示出催化效率的显著提升.工艺因素作用规律结果表明,Ce-PTFE共掺杂PbO2电极在电解质14.2 g.L-1、功率为49.58 W.cm-2、频率50 Hz、pH为3、电流密度为71.43 mA.cm-2的条件下去除APAP效果最佳.反应进行2 h后,500 mg.L-1APAP去除率为92.20%,COD和TOC的去除率分别为79.95%和58.04%,电流效率高达45.83%.结合GC-MS、HPLC、IC等分析手段,检测到了主要中间产物包括苯醌,苯甲酸、乙酸、顺丁烯二酸,乙二酸、甲酸等,推测了APAP的可能降解途径.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 C% 03 under electrolyte concentration of 14. 2 g. L-~ , 49.58 W. cm-2, 50 Hz, pH =3, 71.43 mA.cm 2. The APAP of 500 mg＇L J 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, maleie acid, oxalic acid, formic acid ere, 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.

关 键 词：二氧化铅电极 稀土 声电氧化 制药废水 降解机制 

分 类 号：X703.1[环境科学与工程—环境工程]