含中间层的DSA电极电催化氧化硝基苯废水的研究

为了提高难降解有机废水的可生化性，以及更高效地去除废水中的特征污染物，同时避免二次污染，利用自制的含锡锑中间层的钌钯氧化物涂层电极对有机废水中的硝基苯进行处理，并利用SEM、XRD等方法对电极中间层、表层进行微观表征。微观测试表明，基体、中间层、表层之间结合力较强，有利于增强电极寿命；水处理实验表明，电催化氧化反应体系适合高浓度有机废水的处理，由于该反应体系需要外加电解质加强传质，这在实际运用中为废水中盐度的处理提供了一种新的途径，当电流密度为20 mA/cm²、电解质浓度为10 g/L、pH=5、极板间距=2 cm时，电催化氧化体系对硝基苯具有较高的去除效率。

Study on degradation of nitrobenzene wastewater by electro-catalytic oxidation with DSA electrode

In order to improve the biodegradability of persistent organic wastewater and remove the key pollutants more efficiently in the wastewater. A new type of DSA electrode is used to decompose nitrobenzene wastewater which the electrode is composed of Sn/Sb oxide as mid-layer and Ru/Pd oxide as external-layer. The test of SEM and XRD shows that this electrode has better catalytic-activity,longer life and stronger bonding between bottom-layer,mid-layer and external-layer;the result of wastewater treatment shows that the reaction system is suitable for high concentrations of organic wastewater. Also, the system can provide a new salinity reuse method in the actual wastewater because the system needs electrolyte to enhance the mas transfer. Then, the system can reach a higher removal efficiency under the conditions of J(current density) =20 mA/cm~2,C' (Na_2SO_4 electrolyte concentration) =10 g/L,pH =5 ,L( distance between anode and cathode) =2 cm.