电化学协同催化处理硝基苯废水的研究

电化学协同催化处理硝基苯废水的讨论摘要：本文用复极性固定床电化学反应器协同电催化处理硝基苯模拟废水，通过正交试验确定了电解硝基苯的最优条件：电解电压为 40V；进水初始 pH 值为 10；Na2SO4浓度为1000mg/L。又分别考察了电解电压、Na2SO4浓度、pH 值、硝基苯的初始浓度等条件对电解效果的影响。电化学协同电催化对初始浓度为 60mg/L 的硝基苯废水的电解的最佳去除率为65.78%；在以上条件下，硝基苯初始浓度为 120mg/L 时，硝基苯有最佳的去除效果，其去除率为 80.55%。通过中间及最终产物的 GC-MS 分析，对电化学协同催化降解硝基苯的机理进行了推测。关键词：复极固定床电化学反应器，电催化，硝基苯，机理The study for treatment of nitrobenzene wastewaterwith bipolar packed bed cell (BPBC) and electrocatalyzeAbstract: This study was performed to investigate the treatment of nitrobenzene wastewater with bipolar packed bed cell (BPBC) and electrocatalyze. The effect of voltage, concentration of Na2SO4, pH and initial concentration of nitrobenzene on nitrobenzene removal was studied. It was concluded that 40V of voltage, 1000mg/L of Na2SO4 concentration and pH 3 or pH 10 were its best condition for 60mg/L of nitrobenzene. Under this condition, ratio of nitrobenzene reduction was 65.78%. Nitrobenzene removal had its optimal efficiencies at 120mg/L of nitrobenzene initial concentration (80.55%). With analyzing interim and ultimate production, degradation mechanism of nitrobenzene by BPBC was presumed.Keywords: bipolar packed bed cell (BPBC), electrocatalyze, nitrobenzene，mechanism硝基苯是一种剧毒化学品，也是我国确定的 58 种优先控制污染物之一[1]。它广泛存在于化工、染料、农药和制药等工业部门排放的废水中，具有排放量大、难生物降解、有毒性或“三致”作用等特点，常规处理方法很难获得满意的效果 [2]。目前，硝基苯的处理方法主要集中在物理法和生化法，包括化学氧化法、吸附法、萃取法、超临界水氧化法以及生物法等，但这些方法都存在一定的局限性。近年来，电化学方法作为一种环境友好技术（environment-...