负载型三维粒子电极技术处理农药生产废水研究

摘要

The particle electrode supported with Cu,Zn,Ni,and Mn oxides as active ingredients has been prepared with activated carbon as carriers,and applied to the pretreatment of wastewater from pesticide production. Contrast experiment results show that the active ingredient of Mn-supported oxide activated carbon particle electrode has the best catalytic degradation effect on the organics in the mixed wastewater from pesticide production. After a two-hour reaction,the COD removing rate is as high as 49.5%. The optimum process conditions of the pretreatment of mixed wastewater from pesticide production by Mn-supported oxide activated carbon particle electrode is discussed. The experimental results show that after a two-hour reaction,the COD removing rate reaches 59.5%,under the conditions of pH=3,cell voltage 18 V,and supporting electrolyte Na2SO4 concentration 0.09 mol/L. The first-order reaction kinetics equation is used for fitting the pretreatment reaction process of mixed wastewater from pesticide production by the Mn-supported oxide activated carbon particle electrode. The results show that the degradation process complies with the first-order reaction kinetics equation quite well.%以活性炭为载体制备了负载Cu、Zn、Ni、Mn氧化物为活性成分的粒子电极，并应用于农药生产混合废水的预处理。通过对比实验发现负载Mn氧化物活性炭粒子电极对农药生产混合废水中有机物的降解催化效果最好，反应2 h后COD去除率最高达到49．5％。探讨了Mn氧化物负载活性炭粒子电极预处理农药生产混合废水的最佳工艺条件。实验显示在pH为3，槽电压为18 V和辅助电解质Na2SO4浓度为0．09 mol/L的条件下反应2 h后COD去除率最高达到59．5％。采用一级反应动力学方程对Mn氧化物负载活性炭粒子电极预处理农药生产混合废水的反应过程进行拟合，结果表明降解过程较好地符合一级反应动力学方程。