累托石／壳聚糖吸附剂的制备及对锌的吸附  

Preparation of Rectorite-Chitosan Sorbent and Its Absorption for Zinc

作　　者：李爱阳[1] 李大森 李安伍[1] 

机构地区：[1]湖南工学院,湖南省衡阳市421002 [2]长沙远大住宅工业有限公司

出　　处：《金属矿山》2009年第4期143-145,153,共4页Metal Mine

基　　金：湖南省自然科学基金项目(编号:08JJ3015);湖南省教育厅科研计划项目(编号:07C030);衡阳市工业科研开发计划项目(编号:06KG59)

摘　　要：按浸渍法制备了累托石/壳聚糖复合吸附剂,用复合吸附剂对含Zn2+溶液进行了吸附试验,在试验基础上对实际电镀含锌废水进行了处理。结果表明:当壳聚糖与累托石的质量比为0.04,壳聚糖脱乙酰度为90%时,制成的复合吸附剂吸附效率较高。当水中Zn2+浓度低于100mg/L时,在pH值为7,复合吸附剂用量为3.0g/L,吸附时间为40min条件下,复合吸附剂对Zn2+的吸附率达99%以上,处理后的水符合国家污水综合排放一级标准。Rectorite-ehitosan composite sorbent was prepared by impregnation method, which was used in the adsorption test for Zn^2＋ containing solution. Based on the test, it was used to treat the practical electroplating waste water containing zinc. The result shows that the composite sorbent has a high adsorption rate when the mass ratio of chitosan to rectorite was 0.04 and the deaeetylation degree of chitosan was 90%. At a Zn^2＋ concentration of the solution of lower than 100 mg/ L, a pH value of 7, a composite sorbent dosage of 3.0 g/L and an adsorption time of 40 min, the composite sorbent can have a Zn^2＋ adsorption rate of higher than 99% ,with the treated water conforming to the requirements in the state standard for Class A sewage discharge.

关 键 词：累托石 壳聚糖 复合吸附剂 Zn2+ 

分 类 号：X703[环境科学与工程—环境工程] TQ424.3[化学工程]