以颗粒活性炭(GAC)为载体,通过浸渍法制备了多种负载型粒子电极,并研究其对亚甲基蓝模拟废水的处理效果.结果表明,负载了Mn-Co-Ce复合氧化物的粒子电极对亚甲基蓝的脱色效果最好,1.5h的脱色率可达94.31％,COD去除率为65.11％.通过单因素实验确定的最佳实验条件如下:反应时间为1.5h,槽电压为20 V,辅助电解质Na2SO4浓度为0.15 mol/L,极板间距为4 cm.反应动力学分析显示,亚甲基蓝的脱色反应表现为一级反应动力学.系统连续运行30次以上,脱色率为80％和COD去除率为50％,说明该粒子电极具有一定的稳定性.紫外-可见光吸收光谱分析进一步表明Mn-Co-Ce/GAC对亚甲基蓝溶液有着很好的脱色效果.%Granular activated carbon (GAC was used as the substrate for fabricating load-type particle electrodes with impregnation method.The results showed that the particle electrode loaded Mn-Co-Ce composite oxide performed the high decolorization efficiency to treat methylene blue simulated wastewater.The removal rate of color and COD by Mn-Co-Ce/GAC particle electrodes reached about 94.31％ and 65.11％ in 90 minutes.Experimental results showed that the optimal operating condition was as follows:Reaction time of 90 minutes,voltage of 20 V,Na2SO4 solution of 0.i5 mol/L and the electrode distance of 4 cm.The reaction kinetics analysis indicated that the decolorization reaction of methylene blue belonged to firstorder kinetics.The corresponding color and COD degradation rate reached about 80％ and 50％ after the system ran 30 cycles,which showed that the Mn-Co-Ce/GAC particle electrodes had a certain degree of stability.Analytical reSults from UV-visible absorption spectra indicated that the Mn-Co-Ce/GAC particle electrodes had good decolorization effect on treating methylene blue.
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