颗粒活性炭三维电极臭氧体系降解布洛芬影响因素及机理研究  

Study on influencing factors and mechanism of degradation of ibuprofen by particle activated carbon three-dimensional electrode ozone system

作　　者：拓明明 张甜甜 白焕婷 王拓 安琪琪 甄延忠[2] TA Mingming;ZHANG Tiantian;BAI Huanting;WANG Tuo;AN Qiqi;ZHEN Yanzhong(School of Architecture Engineering,Yan’an University,Yan’an University,Yan’an 716000,China;School of Petroleum Engineering and Environmental Engineering,Yan’an University,Yan’an 716000,China)

机构地区：[1]延安大学建筑工程学院,陕西延安716000 [2]延安大学石油工程与环境工程学院,陕西延安716000

出　　处：《延安大学学报（自然科学版）》2024年第3期10-18,共9页Journal of Yan'an University：Natural Science Edition

基　　金：陕西省自然科学基础研究计划项目(2024JC-YBQN-0105);陕西省教育厅专项科研计划项目(23JK0734);国家自然科学基金项目(22068037);陕西省厅市联动项目(2022GD-TSL-68)。

摘　　要：为了解决传统电催化臭氧(E-O_(3))工艺中传质效率低和难降解有机物的问题,在E-O_(3)工艺中引入了颗粒活性炭(GAC)粒子电极,建立三维E-O_(3)体系(E-O_(3)-GAC)。选取布洛芬(IBP)作为目标污染物,对比研究该体系氧化降解效率。结果表明,E-O_(3)-GAC体系氧化能力明显优于常规催化体系(电解(E)、活性炭吸附(GAC)、臭氧氧化(O_(3))、活性炭催化(O_(3)-GAC)、电催化臭氧(E-O_(3))),在40 min反应时间内,IBP降解率可达96.9%。同时,E-O_(3)-GAC体系的协同指数(SI)为2.97,表明电场和GAC具备较好的协同活化作用。E-O_(3)-GAC体系的最佳运行参数为:GAC浓度0.5 g/L,电流强度300 mA,O_(3)流速60 mL/min,初始溶液为酸性条件。一系列猝灭与表征实验表明,在E-O_(3)-GAC体系中,GAC和电场协同催化O_(3),明显提高羟基自由基(·OH)产量。GAC作为微粒电极,能够有效还原水溶液中O_(2)为H_(2)O_(2),与O_(3)反应生成·OH。外加电场对GAC提供保护作用,从而保持GAC催化活性的稳定。综上,E-O_(3)-GAC体系是一个高效、稳定的有机废水处理技术,有望在有机废水处理领域发挥优势。To solve the problems of low mass transfer efficiency and difficult degradation of organic matter in traditional electrocatalytic ozone(E-O_(3))process,particle electrode of granular activated carbon(GAC)was introduced into the E-O_(3)process,and three-dimensional E-O_(3)system(E-O_(3)-GAC)was established.Ibuprofen(IBP)was selected as the target pollutant to compare the oxidative degradation efficiency of the system.The results show that the oxidation capacity of E-O_(3)-GAC system is significantly better than that of conventional catalytic systems(electrolysis(E),activated carbon adsorption(GAC),ozone oxidation(O_(3)),activated carbon catalysis(O_(3)-GAC),electrocatalytic ozone(E-O_(3))),and the degradation rate of IBP can reach 96.9%within 40 min reaction time.At the same time,the synergistic index(SI)of E-O_(3)-GAC system is 2.97,indicating that the electric field and GAC have good synergistic activation.The optimal operating parameters of E-O_(3)-GAC system are as follows:GAC concentration is 0.5 g/L,current intensity is 300 mA,ozone flow rate is 60 mL/min,and the initial solution is acidic.A series of quenching and characterization experiments showed that in the E-O_(3)-GAC system,GAC and electric field synergistically catalysed O_(3),significantly increasing the yield of hydroxyl radical(·OH).GAC,as a particle electrode,could effectively reduce O_(2)to H_(2)O_(2)in aqueous solution and react with O_(3)to generate·OH.The applied electric field offered a protective effect for the GAC,thus maintaining the stability of GAC catalytic activity.To sum up,the E-O_(3)-GAC system is efficient and stable.In summary,E-O_(3)-GAC system is an efficient and stable organic wastewater treatment technology,which is expected to play an advantage in the field of organic wastewater treatment.

关 键 词：颗粒活性炭 三维电极 臭氧 协同效应 羟基自由基 

分 类 号：X703[环境科学与工程—环境工程]