声电联合技术氧化降解2-氯酚的研究

在优化电解（EC）条件的基础上，以2-氯酚（2-CP）为模拟污染物，研究了超声（US）-电解（EC）联合技术氧化降解的性能，并初步探讨了其降解过程．结果表明：电解质Na2SO4浓度和pH是影响声电组合技术的重要因素，当pH〉9，电解质Na2SO4浓度大于0．15mol／L时，声电组合降解2-CP的效率最高．US—EC降解2-CP的动力学方程符合拟一级动力学关系，其表观反应速率常数（0．0096min^-1）大于EC（0．0055min^-1）和US（0．0034min^-1）两种单因素作用之和，表明超声与电解组合降解2-CP时，对电解产生显著的协同效应。通过LC／MS检测，2-氯-1，4-对苯醌为2-CP降解中间产物，说明2-CP的降解经历了羟基对位氧化、开环等过程．

Ultrasound assisted electrocatalysis oxidation for enhanced decomposition of 2-chlorophenol in water

Ultrasound(US) assisted electrocatalysis(EC) oxidation was evaluated as an effective treatment strategy for enhanced decomposition of organic chloride.The 2-chlorophenol(2-CP) was used as a model compound and treated in electrochemical systems with and without ultrasound,respectively.Experimental results showed that 2-CP decomposition level depended on the alkalinity and conductivity of water phase.High alkalinity and concentration of electrolyte were favorable to the decomposition of 2-CP.The apparent reaction rate in US/EC decomposition of 2-CP was 0.009 6 min~(-1),more than the addition of the effects of electric catalysis(0.005 5 min~(-1)) and ultrasound(0.003 4 min~(-1)) used alone.The major intermediate formed during 2-CP decomposition was 2-chloro-p-benzoquinone,which was also readily decomposed using US/EC process.