负载型活性炭粒子三维电极法处理亚甲基蓝模拟废水  

Treatment of methylene blue simulated wastewater by supported activated carbon particle with three⁃dimensional electrode method

作　　者：谢江 郭戈 邱洁 XIE Jiang;GUO Ge;QIU Jie(Changqing Oilfield(Yulin)Oil&Gas Co.,LTD.,Yulin 719000,China)

机构地区：[1]长庆油田(榆林)油气有限公司,陕西榆林719000

出　　处：《无机盐工业》2024年第5期78-86,共9页Inorganic Chemicals Industry

摘　　要：为了改善三维电极体系中粒子电极对亚甲基蓝(MB)模拟废水的电催化氧化处理效果,采用等体积浸渍法和烧结法成功合成了金属氧化物与颗粒活性炭相结合的粒子电极(M/AC),并对其进行表征。考察了金属组分种类和金属组分负载量对粒子电极催化性能的影响,并对所合成粒子电极的反应机理进行了探讨。结果表明:M/AC粒子电极为多通道多孔网状结构,可以提供大量的表面活性位点;M/AC粒子电极在三维电极体系中对高浓度MB模拟废水表现出良好的电催化降解能力;Mn/AC粒子电极的最佳负载量为5%(质量分数),其电催化氧化性能优于Fe/AC和Ni/AC粒子电极;Mn(5)/AC在三维电极体系中运行8 h后对MB模拟废水的电催化降解率为90%,200 h后仍可达到80%以上;在电催化氧化过程中,Mn/AC粒子电极表面的Mn^(2+)、Mn^(3+)和Mn^(4+)可以实现催化循环,产生活性物质,即羟基自由基和超氧自由基。Mn/AC粒子电极具有长期稳定电催化降解水中有机污染物的潜力。To improve the effect of electrocatalytic oxidation on methylene blue(MB)simulated wastewater by particle elec-trode in three-dimensional electrode system,a particle electrode(M/AC)combining metal oxides with granular activated carbon was successfully synthesized with equal volume impregnation and sintering methods and characterized.The effects of the type and loading of metal components on the catalytic performance of the particle electrode were investigated.Moreover,the reaction mechanism of the synthesized particle electrode was discussed.The results indicated that:M/AC particle elec-trode had multi-channel porous network structure,which could provide a large number of surface active sites.The M/AC par-ticle electrode showed good electrocatalytic degradation ability for high concentration MB simulated wastewater in three-di-mensional electrode system.The optimal loading capacity of Mn/AC particle electrode was 5%(mass fraction),and its elec-trocatalytic oxidation performance was better than that of Fe/AC and Ni/AC particle electrode.The electrocatalytic degrada-tion rate of Mn(5)/AC in the three-dimensional electrode system was 90%after 8 h,and could still reach more than 80%af-ter 200 h.In the electrocatalytic oxidation process,Mn^(2+),Mn^(3+) and Mn^(4+) on the surface of Mn/AC particle electrode could achieve catalytic cycling and produce active substances(hydroxyl radical and superoxide radical).Mn/AC particle electrode had the potential for long-term stable electrocatalytic degradation of organic pollutants in water.

关 键 词：三维电极 粒子电极 活性炭 金属氧化物 电催化 

分 类 号：O647.3[理学—物理化学]