钛基修饰氧化物电极降解氧化乐果的研究

Preparation of Oxide Electrode and Application in Degradation of Omethoate

采用钛基锡锑铅氧化物为阳极,以有机磷农药氧化乐果为目标有机物,考察了电压、电解质加入量、pH、电解时间等因素对氧化乐果的降解率和溶液COD的影响。当外加电压为8 V,电解质硫酸钠的浓度0.1 mol.L-1,pH=6,电解100 mg.L-1的氧化乐果模拟废水,2.0 h降解率为97.22%,电解时间为3.0 h时,溶液的COD去除率达78.68%。并以水杨酸为探针性物质,推测出电催化过程中羟基自由基的产生。

The Ti/Sn,Sb,Pb oxide electrodes were prepared by thermal oxidation. The results showed that the removal efficiency and the removal COD of omethoate was influenced by voltage, the concentration of electrolyte （Na2SO4）, pH and the reaction time. With voltage of 8V, 0.1 mol·L^-1 Na2SO4, the removal efficiency of omethoate solution （100 mol·L^-1） was 97.22 % when the electrolysis＇ s time was 2.0 h. When the simulated wastewater was treated for 3 h, the removal rate of COD was 78.68 %. Salicylic acid had been used as a probe to discuss the generation of the hydroxyl radical.