应用天然褐铁矿催化生物电芬顿体系氧化橙Ⅱ染料  

Using Raw Limonite Ore in a Bio-Electro-Fenton System for Oxidation of Orange Ⅱ

作　　者：陶虎春[1] 丁辉[1] 石刚[1] 李金波[1] 

机构地区：[1]北京大学深圳研究生院环境与能源学院深圳市重金属污染控制与资源化重点实验室城市人居环境科学与技术重点实验室,广东深圳518055

出　　处：《应用基础与工程科学学报》2014年第4期625-633,共9页Journal of Basic Science and Engineering

基　　金：深圳市重点实验室组建项目(CXB201111240110A);重点实验室提升项目(CXB201105100085A)

摘　　要：研究比较了将褐铁矿、磁铁矿和赤铁矿3种铁矿粉投加到生物电芬顿体系中,发生Fenton反应氧化降解模拟废水中的橙Ⅱ染料的效果.结果表明,3种铁矿均能够催化形成生物电芬顿体系,其中褐铁矿的催化效果最好,2.5h橙Ⅱ染料的去除率可以达到98%以上.在以褐铁矿催化的生物电芬顿体系中,pH值1—5范围内,pH值越低对橙Ⅱ的去除效果越好.pH值为2的模拟橙Ⅱ染料废水经25h连续处理,COD去除率可以达到72%,矿化电流效率达76.90%.向50ml阴极体系中投加0.1g褐铁矿,可以维持体系在较高的氧化效率下连续运行20个周期,且没有残渣产生.The oxidative degradation of Orange Ⅱ dye in synthetic wastewater was studyed in three Bio-Electro-Fenton systems which were dosed limonite, magnetite and hematite iron ore powder, respectively. The results showed that these three kinds of iron ore were able to catalyze the reaction in Bio-Electro-Fenton system, and the catalytic effect of limonite was the best. More than 98% of Orange Ⅱ dye was removed in 2.5h. In the Bio-Electro-Fenton system catalyzed by limonite,the catalytic effect was improved by decreasing pH within the range of pH 1--5. After 25 hours treatment at pH = 2, the COD removal efficiency of the Orange Ⅱ dye reached 72% and the mineralization current efficiency was 76.90%. The system could be maintained for 20 cycles with high removal efficiency and no excess sludge being produced when a dose of 0. lg limonite added to 50mL catholyte.

关 键 词：褐铁矿 生物电芬顿 橙Ⅱ染料 

分 类 号：X703.1[环境科学与工程—环境工程]