摘要
文章以啤酒酵母为原料制备了载钴活性炭(Co/AC)和活性炭(AC,对照材料),用于强化电芬顿处理亚甲基蓝(MB)废水,对体系中存在的吸附和催化降解耦合作用进行了研究。独立吸附反应中,Co/AC对MB的吸附动力学过程和等温吸附过程分别符合准二级动力学模型和Langmuir方程,其理论饱和吸附容量为232.48 mg/g,低于AC(399.79 mg/g)。电芬顿反应中,Co/AC催化对MB和TOC去除率分别为99.05%、88.57%,高于AC催化的95.95%、68.87%,以及硫酸亚铁催化的35.53%、32.37%。Co/AC优异的催化降解MB性能主要源于其具有更强的促进·OH生成的能力。Co/AC对MB的吸附和催化降解耦合作用过程符合构建的Langmuir-first-order动力学方程。
This paper describes a noval catalyst,cobalt-loaded activated carbon(Co/AC),and a bench-scale experiment involving the preparation of Co/AC and the activated carbon(AC)with a sort of raw material,beer-yeast.Researches on enhancing the electric-Fenton degradation of methylene blue(MB)in wastewater were thereby carried out using Co/AC with AC as a control subject,which highlighted the coupling effect of adsorption and catalytic degradation of MB.As a result,it was showed that in the independent adsorption reaction,the processes of adsorption kinetics and isotherm during MB degradation with Co/AC well fitted the pseudo-second-order model and Langmuir equation,respectively,and the theoretical saturated adsorption capacity was 232.48 mg/g,lower than that with AC(399.79 mg/g);while during the electric-Fenton reaction,the efficiencies of removing MB and TOC in the presence of Co/AC were respectively 99.05%and 88.57%,being higher than those with AC(95.95%of MB and 68.87%of TOC)and with catalyst FeSO4(35.53%of MB and 32.37%of TOC).Summarily,the excellent catalytic activity of Co/AC could be attributed to its ability for boosting the generation of·OH;and the coupling process of adsorption/catalytic degradation of MB was in compliance with the Langmuir-first-order-kinetic equation that had been constructed.
作者
康瑾
王琪
高瞻
熊平
蔡俊雄
KANG Jin;WANG Qi;GAO Zhan;XIONG Ping;CAI Junxiong(Hubei Provincial Academy of Eco-environment Sciences(Provincial Ecological Environment Engineering Assessment Center),Wuhan 430072,China;Hubei Key Laboratory of Pollution Damage Assessment and Environmental Health Risk Prevention and Control,Wuhan 430072,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2023年第12期58-64,共7页
Environmental Science & Technology
基金
湖北省自然科学基金计划项目(2023AFB583)
关键词
载钴活性炭
电芬顿
吸附
催化降解
亚甲基蓝
cobalt-loaded activated carbon
electric-Fenton
adsorption,catalytic degradation,methylene blue
