Ti-PbO2-La电极处理硝基苯废水

利用电沉积法制备Ti-PbO2-La电极，考察了不同掺镧电极对电化学氧化反应中?OH生成的影响，结合SEM、XRD发现，电镀液中掺镧可使电极活性层发生结构改变，增大电极稳定性的同时生成更多的羟基自由基参与降解反应。实验表明当掺杂量为0.015mol/L时电极对模拟水处理效率最高。硝基苯、化学需氧量的浓度变化和电流强度、溶液pH、初始浓度有关。实际水的最佳处理条件是：I=0.9A，pH=5,d=1cm。当NB(ρ)=322.7mg\L，CODcr=1730mg/L时，反应2.5h后， NB(ρ)<0.2mg/L；反应4.5h后，CODcr<40mg/L。

Treament of Nitrobenzene Wastewater with Ti//PbO2-La Electrode

By using electro-deposition Ti-PbO2-La electrodes, visited different La-doped electrodes for electrochemical oxidation of the formation of ?OH. Combined with SEM and XRD, found that La-doped in electroplating solution enables active electrode layer occurs enlarges electrode structure changes, while increasing the stability of hydroxyl radicals generated in more degradation. Experiments show when the doping of 0.015mol/L of electrodes to simulated water treatment efficiency. Meanwhile, the change of nitrobenzene, CODcr concentration and current intensity, pH, initial concentration is associated. The best treatment actual water conditions: I = 0.9A, pH = 5, d = 1cm.When started with the NB (ρ) is 322.7mg \ L and CODcr is 1730mg / L, after the reaction of 3h, the NB (ρ) is less than 0.2mg / L, CODcr is less than 40mg / L, which meet the national emission standards.