电解质类型对电化学降解苯酚的影响

Effect of Eletrolyte Types on Degredation of Phenol by Electrochemical Oxidation

以典型有机污染物苯酚为研究对象,NaCl、CaCl_2、Na_2SO_4为支持电解质,用涂层钛电极进行了电氧化试验,研究了电解质种类、浓度、不同比例氯化钙、氯化钠混合组分组成对苯酚降解效率的影响。并从pH值、活性氯含量进行了分析评价。试验结果表明:电解质中氯离子的存在具有间接氧化的作用。含氯电解质总质量分数2%条件下,单一组分氯化钙在开始4h内比氯化钠具有更高的活性氯产量和和降解效率;当氯化钠、氯化钙混合投加时,两者质量比为1∶1时,苯酚降解效率最高。

Taking Phenol asresearch subjectand NaCl, CaCl2 and Na2SO4 as the supporting electrolyte, the effect of species, concentration, different proportion of CaCl2 and NaCl of supporting electrolyte to phenol removal rate was studied, with coated Ti-anode as the working electrode in this paper. It was evaluated from the angle of pH and active chloride as well. The experimental results showed that active chlorine had an indirect oxidation effect. CaCl2 had a higher generation of active chloride and removal rate of phenol than NaCl at the beginning 4 hours when total mass fraction in the chloride electrolyte was 2%. What＇ s more, when the proportion of NaCl： CaCl2 was 1：1, the degradation of phenol efficiency was the best.