GAC/α-FeOOH非均相(电)芬顿催化剂处理罗丹明B废水研究  

Study on treatment of Rhodamine B wastewater with GAC/α-FeOOH heterogeneous(electrical)Fenton catalyst

作　　者：尹梓珊 王双玉 李沛沛 万春城 王艳秋[1] YIN Zishan;WANG Shuangyu;LI Peipei;WAN Chuncheng;WANG Yanqiu(School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Anshan Hifichem CO.,Ltd.,Anshan 114200,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051 [2]鞍山七彩化学股份有限公司,辽宁鞍山114200

出　　处：《辽宁科技大学学报》2024年第6期430-438,共9页Journal of University of Science and Technology Liaoning

基　　金：辽宁省教育厅项目(JYTMS20230957);辽宁省大学生创新创业训练计划(S202310146037)。

摘　　要：为解决均相芬顿易产生铁泥、催化剂无法回收等问题,本文采用浸渍法制备非均相芬顿催化剂GAC/α-FeOOH,应用于非均相(电)芬顿体系处理罗丹明B(RhB)废水。采用非均相化学芬顿体系降解RhB,当pH=5,GAC/α-FeOOH投加量35 g/L,H_(2)O_(2)体积分数2.2%时,120 min内RhB降解率99.99%,COD去除率96.91%。采用非均相电芬顿体系降解RhB,当电压10 V,pH=7,GAC/α-FeOOH投加量2.5 g,电解质溶液60 mL时,180 min内RhB降解率99%,COD去除率98.1%。淬灭实验证明了·OH的产生,采用UV-Vis和GC-MS对处理过程中的RhB废水进行表征,揭示RhB废水降解机理,RhB在芬顿反应产生的·OH的作用下,断链为小分子物质,进一步被矿化为H2O和CO_(2)。To solve the problem that homogeneous Fenton is prone to produce iron sludge and the catalyst cannot be recovered,the heterogeneous Fenton catalyst GAC/α-FeOOH was prepared by an impregnation method and applied to a heterogeneous(electro)Fenton system for the treatment of Rhodamine B(RhB)wastewater.When the conditions for RhB degradation in the heterogeneous chemical Fenton system were pH=5,GAC/α-FeOOH dosage of 35 g/L,and H_(2)O_(2) volume fraction of 2.2%,the degradation rate of RhB was 99.99%and the COD removal rate was 96.91%in 120 min.A heterogeneous electro-Fenton system was used to degrade RhB,which resulted in 99%degradation of RhB and 98.1%removal of COD in 180 min when the voltage was 10 V,pH=7,GAC/α-FeOOH dosage was 2.5 g,and the electrolyte solution was 60 mL.Quenching experiments proved the production of·OH,and UV-Vis and GC-MS were used to characterise the RhB wastewater during the treatment process and to analyse the RhB wastewater degradation mechanism.The mechanism is that in the presence of·OH produced by the Fenton reaction,the RhB molecule is broken into small molecules,which are further mineralized into H_(2)O and CO_(2).

关 键 词：颗粒活性炭 Α-FEOOH 非均相芬顿催化剂 电芬顿 罗丹明B 

分 类 号：X703[环境科学与工程—环境工程]