201×7强碱性阴离子交换树脂对氰化物的吸附性能及吸附机理  

Adsorption property and mechanism of 201×7 strongly basic anion exchange resin for cyanide

作　　者：廖赞[1] 兰新哲[2] 朱国才[3] 

机构地区：[1]北京有色金属研究总院 [2]西安建筑科技大学冶金工程学院 [3]清华大学核能与新能源研究院

出　　处：《黄金》2008年第7期46-50,共5页Gold

基　　金：国家863资助项目(2003AA32X090)

摘　　要：通过试验选择了201×7强碱性阴离子交换树脂吸附氰化物,确定了该树脂对氰化物的静态饱和吸附量为25.39mg/mL湿树脂,动态饱和吸附量为27.43mg/mL湿树脂。在研究解吸的过程中,选择中性NaCl溶液作为解吸剂,取得了良好的解吸效果。通过动态试验,研究了氰化物质量浓度、流速等因素对树脂吸附性能的影响,以及NaCl溶液流速对淋洗效果的影响。研究探讨了该树脂吸附氰化物的机理,结果表明,氰化物在201×7树脂上的吸附机理主要是CN-与树脂的季胺基团形成氢键吸附和范德华引力吸附。201×7树脂对氰化物的吸附性能较好,在处理、回收提金废水氰化物中,具有工业应用前景。In lab tests, 201× 7 strongly basic anion exchange resin is selected for cyanide adsorption. The results show that the capacity of static saturation adsorption for cyanide is 25.39mg/mL wet resin, and the dynamic saturation is 27.43mg/mL wet resin. At the same time, a neutral strippant NaCl is selected and good stripping effects were achieved. Furthermore, the influence of flow rate and concentration of cyanide on adsorption and elution is examined. The paper primarily discusses the adsorptive mechanics of 201× 7 resin for cyanide. It shows that hydrogen bond and physical adsorption forms. So 201 × 7 strongly basic anion exchange resin has good foreground for cyanide disposal and recovery from the cyanide containing wastewater.

关 键 词：阴离子交换树脂 氰化物 吸附 解吸 机理 

分 类 号：X751[环境科学与工程—环境工程]