负载型三维粒子电极降解甲基橙模拟废水研究

Process of methyl orange simulated wastewater degraded by supported bipolar three-dimension particle electrodes

采用负载型活性炭为填充电极的三维电极法处理甲基橙模拟废水,研究了不同粒子电极的处理效果,考察了影响模拟废水中色度与COD去除率的因素,探讨了甲基橙降解的反应动力学,并运用紫外-可见吸收光谱初步研究了甲基橙的降解机理.结果表明,负载锰的氧化物的粒子电极处理效果最好,降解3h后,色度与COD去除率分别达95%与80%;通过单因素实验确定的最佳实验条件:槽电压12V,初始pH值为3,辅助电解质浓度0.05mol/L.反应动力学分析显示,甲基橙降解反应表现为一级反应动力学.紫外-可见吸收光谱分析结果表明,以负载型活性炭为粒子电极的三维电极法对模拟废水中的色度与COD具有很好的降解效果.

The methyl orange simulated wastewater has been treated by a three-dimensional-electrode processin which load-type activated carbon was used as particle electrodes. Effects of different particle electrode and the factors affecting the removal efficiency of COD and degradation of color were studied. Kinetics and the degradation mechanism of methyl orange simulated wastewater was studied by UV-visible absorption spectra. Loading manganese compounds＇ particle electrodes could get best effect,the corresponding color and COD degradation rate reached about 97% and 80% after 3h,respectively. Experimental results showed that the optimal operating conditions were as follows：cell voltage 12V,initial pH value 3,concentration of supporting electrolyte 0.05mol/L. The analysis results from kinetics indicated that the degradation of methyl orange was first-order kinetics. Analytical results from UV-visible absorption spectra indicated the color and COD were well degraded by three-dimensional-electrode process using load-type activated carbon as particle electrodes.