钛基二氧化铅阳极、泡沫镍阴极电化学降解偶氮类染料酸性红18的研究  

PbO_2/Ti Anode and Foam Ni Cathode Electrochemical Degradation of Acid Red 18

作　　者：查磊[1] 史雪莲[1] 秦娜娜[1] 王斌[1] 

机构地区：[1]四川大学建筑与环境学院,成都610065

出　　处：《四川化工》2011年第5期17-22,共6页Sichuan Chemical Industry

摘　　要：以钛基二氧化铅作阳极,泡沫镍作阴极对偶氮类染料酸性红18溶液进行电解。在不添加隔膜的条件下,考察了电压、电流、电解质含量、pH值等因素对酸性红18电化学降解的影响,同时对不同降解时间后AR18的相对残余浓度与时间的相关性进行分析,结果表明,酸性红18的降解符合准1级反应动力学方程。在添加隔膜的条件下,对酸性红18在硫酸钠和氯化钠电解质体系的电解进行紫外-可见光光谱分析,结果表明,酸性红18在硫酸钠电解质体系中的脱色主要表现为阴极还原,酸性红18在氯化钠电解质体系中的脱色主要表现为阳极氧化。PbO2/Ti anode and foam Ni cathode were used in electrolysis of acid red 18 （AR18） solution. Voltage, current , electrolyte concentration and pH that affected electrochemical degradation of AR18 was studied without ion exchange membrane. Simultaneously, we analyzed the correlativity between remnant concentration of AR18 and electrolysis time. The results showed that the degradation of AR18 was consistent with first-order kinetic. In the experiment appending ion exchange membrane, we analysed the UV- Visible spectrum data in differentelectrolyte, the result indicated that the decolorization mechanism of AR18 with Na2SO4 electrolyte was cathode reduction, conversely, the decolorization mechanism of AR18 with NaClelectrolyte was anode oxidation.

关 键 词：酸性红18 电化学 脱色 

分 类 号：X703[环境科学与工程—环境工程]