1%La掺杂膨润土/纳米TiO_2材料处理氰化贫液性能研究  

Study on Properties of 1%La Doped Bentonite/Nano TiO_2 in Treating Cyanide Waste Water

作　　者：曹旭[1] 王青龙[2] 张亚莉[2] 赵景刚[1] 王晓亮[1] 杨宝书 宫本奎[2] 赵萍萍[2] 

机构地区：[1]山东河西黄金集团有限公司,山东招远265402 [2]山东理工大学化学与工程学院,山东淄博255049

出　　处：《湿法冶金》2017年第1期61-64,68,共5页Hydrometallurgy of China

基　　金：山东省自然科学基金资助项目(ZR2013EEM005)

摘　　要：研究了用1%La掺杂膨润土/纳米TiO_2材料处理氰化贫液,考察了吸附时间、光催化时间、溶液pH、溶液温度对处理效果的影响。结果表明:在吸附时间2h、光催化2h、溶液pH为10左右、溶液温度25℃条件下,铜、锌吸附率分别达80%和65%,CN-分解率达45%。氰根催化机制表明,在高压汞灯光源照射下,氰化贫液中的CN-最终分解为NO_3^-、CO_3^(2-)等物质。1% lanthanum was doped in bentonite/nano-TiO2 to treat cyanide waste water. The treating effects of adsorption time,optimum photocatalytic time,waste water pH and solution temperature on CN-decomposition rate and adsorption rate of Cu2＋ and Zn2＋ were examined. The experiment results show that the optimum absorption time is 2 h,the optimum photocatalytic time is 2 h,the pH of waste water is about 10,and the solution temperature is 25 ℃. Under the optimal conditions, the adsorption rate of copper and zinc are 80% and 65%, respectively, the decomposition rate of cyanide is 45%. Under the high pressure mercury lamp,the cyanide is decomposed into NO3- and CO3 2-.

关 键 词：膨润土/纳米TiO2 氰化物 废水 光催化 吸附 

分 类 号：X758[环境科学与工程—环境工程]