摘要：
采用生物法合成Pd/C催化剂，制备成bio-Pd/C气体扩散电极降解甲基橙模拟废水，考察了电流大小、pH、曝气条件对甲基橙去除效果的影响，探讨了bio-Pd/C气体扩散体系下的电催化降解机制。结果表明，所制备的催化剂中Pd以无定形态存在并高度分散在生物炭内部连通的孔隙中，形状比较规则，粒径为10~15 nm。反应30 min后，bio-Pd/C气体扩散体系对甲基橙的去除率达到99%、对TOC的去除率达到53%。增大电流、低pH、增加曝气均有利于甲基橙的降解，在bio-Pd/C气体扩散体系中掺杂Pd催化剂可以强化甲基橙的降解。
关键词:
电Fenton,
气体扩散电极,
bio-Pd/C催化剂,
降解,
甲基橙
Abstract:
Pd/C catalyst has been synthesized by biological method, the bio-Pd/C gas diffusion electrode prepared for the degradation simulated methyl orange wastewater, the influence of current intensity, pH and aeration conditions on the removing effect of methyl orange investigated, and the electro-catalytic degradation mechanism of bio-Pd/C gas diffusion system discussed. The results show that the Pd in the prepared catalyst exists in amorphous form, and highly disperses in the interconnecting pores of charcoal. Its shape is comparatively regular and particle size 10-15 nm. After reacted for 30 min, the removing rate of methyl orange by bio-Pd/C gas diffusion system is 99%, TOC removing rate 53%. Increasing current, low pH and aeration are beneficial to the degradation of methyl orange. Adding Pd catalyst to bio-Pd/C gas diffusion system can enhance the degradation of methyl orange.
Key words:
electro-Fenton,
gas diffusion electrode,
bio-Pd/C catalyst,
degradation,
methyl orange
中图分类号:
韩锐善,谢韦,汪启年,武超. bio-Pd/C气体扩散电极的电Fenton体系降解甲基橙[J]. 工业水处理, 2019, 39(5): 24-28.
Ruishan Han,Wei Xie,Qinian Wang,Chao Wu. Degradation of methyl orange by the electro-Fenton system of bio-Pd/C gas diffusion electrode[J]. Industrial Water Treatment, 2019, 39(5): 24-28.