| 声电氧化处理扑热息痛的研究 |
| 摘要点击 1701 全文点击 900 投稿时间：2011-09-21 修订日期：2012-02-02 |
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| 中文关键词 二氧化铅电极 稀土 声电氧化 制药废水 降解机制 |
| 英文关键词 lead dioxide electrode rare earth sono-electrochemical oxidation pharmaceutical wastewater degradation mechanism |
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| 中文摘要 |
| 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-1 APAP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. |
| 英文摘要 |
| 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 Ce2O3under electrolyte concentration of 14.2 g·L-1, 49.58 W·cm-2, 50 Hz, pH=3, 71.43 mA·cm-2. The APAP of 500 mg·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. |
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