光电催化技术同时降解有机物与回收重金属的研究  

Treatment of Rhodamine B and Recovery of Cu^(2+) Ions by Photoelectrocatalytic Process

作　　者：张隽瑀 郭礼宝[1] 赵旭[1] 曲久辉[1] 

机构地区：[1]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085 [2]北京大学附属中学,北京100190

出　　处：《中国给水排水》2013年第15期111-114,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51222802)

摘　　要：采用光电组合法同时实现了罗丹明B的氧化降解和Cu2+的回收。TiO2/Ti薄膜电极作为光电催化阳极,光电催化产生的氧化剂可有效氧化罗丹明B;不锈钢作为光电催化反应阴极,游离的Cu2+在阴极得到电子被还原沉积回收。针对5 mg/L罗丹明B和0.2 mmol/L Cu2+的混合体系,光电催化氧化技术、光催化氧化与电化学氧化过程对罗丹明B的去除率分别为80%、50%、40%,对Cu2+的回收率分别为78%、8%、60%,可见光电组合具有良好的协同作用。光电组合处理罗丹明B和Cu2+的最佳pH值为3.5、电流密度应控制在0.3~0.6 mA/cm2。研究结果显示光电催化技术可作为罗丹明B和Cu2+混合废水的一种处理方法。Photoelectrocatalytic oxidation was used to treat simulated wastewater containing rhoda- mine B and Cu2＋ ions. TiO2/Ti thin film was used as the photoanode which produced strong oxidant to oxidize rhodamine B under UV light irradiation. Stainless steel was used as photocathode on which Cu^2＋ ions were reduced and recovered by electrodeposition. The removal rates of rhodamine B were 80% , 50% and 40% , and the recovery rates of Cu^2＋ were 78% , 8% and 60% when the wastewater containing 5 mg/L rhodamine B and 0.2 mmol/L Cu^2＋ was treated by photoelectroncatalytic oxidation, photocatalyt- ic oxidation and electrochemical oxidation, respectively. The optimum pH of photoelectroncatalytic oxida- tion was 3.5, and the current density should be controlled between 0.3 and 0.6 mA/cm2. Photoelectron- catalytic oxidation technology is an effective method to treat rhodamine B and Cu2＋ ions mixed wastewater.

关 键 词：光电催化技术 罗丹明B CU^2+ 

分 类 号：X703[环境科学与工程—环境工程]