Ru0.7Si0.3O2/Ti电极电催化氧化处理硝基苯废水

Degradation of Nitrobenzene Wastewater by Electrocatalytic Oxidation with Ru_(0.7)Si_(0.3)O_2/Ti Electrode

制备了Ru0.7Si0.3O2/Ti电极,并以该电极作为氧化阳极,不锈钢为阴极,电催化氧化降解废水中硝基苯。实验结果表明,当硝基苯初始质量浓度为220 mg/L时,最佳条件为:电流密度25×10-3 A/cm2;Na2SO4作为电解质时加入量为8 g/L;溶液初始pH=2。在此最佳条件下,硝基苯去除率大于85%,TOC去除率大于50%,表明Ru0.7Si0.3O2/Ti阳极能有效去除废水中有机污染物;对中间产物的检测结果表明,硝基苯的降解是阴阳两极协同作用的结果。

A Ru0.7Si0.3O2/Ti electrode is used as the anode and stainless steel as the cathode,to decompose nitrobenzene in wastewater.The optimal conditions are as follows when the original concentration is 220 mg/L,J（current density）=25×10-3 A/cm2,ρ（Na2SO4）=8 g/L,pH=2.Under the optimal conditions,the removal efficiencies of nitrobenzene and TOC are above 85% and 50% respectively.The result shows Ru0.7Si0.3O2/Ti anode can effectively remove the organic pollutants in wastewater.The result of the intermediates detection shows that the nitrobenzene degradation is a synergistic process of the anode and the cathode.