电化学处理苯酚废水时阳极聚苯酚膜的剥离

采用刮削法、化学试剂法、热力分解法、电化学法等对电化学处理苯酚废水时阳极生成的聚苯酚膜层与不锈钢基体的分离进行了探索研究。电化学测试、差热扫描分析结果表明：刮削法、化学试剂法和热力分解法存在膜去除不彻底或聚合物不能回收等缺点，只有电化学法能彻底移除阳极聚苯酚膜。控制体系pH为2、采用0.1mol/L硫酸钠水溶液为电解质、阳极电流密度维持在10mA/cm²以上及电解时间3～10min，即可将苯酚聚合物与不锈钢基体剥离，阳极不锈钢电极可直接回用。

Removal of poly(phenol) formed on the anode during treatment of phenol wastewater by electrochemical methods

The use of the scraping method, chemical reagents method, thermal decomposition method and electrochemical stripping method have been compared as a means of removing the electro-polymerization products formed by the electrochemical treatment of phenol wastewater from a 304 stainless steel substrate. It was shown that the electrochemical method was the best method of removal, since the scraping method, chemical reagents method and thermal decomposition method have several disadvantages, such as incomplete removal, and inability to reuse the electrode. By keeping the current density above 10mA/cm² at the interface between poly(phenol) and 304 stainless steel for 3-10 minutes, there was a perfect separation between them in 0.1mol/L sodium sulfate aqueous solution, with a pH of 2. In addition, the stainless steel electrode can be directly reused.