ZnCl_2改性花生壳对含铜废水的吸附研究  

Adsorption of copper from wastewater by ZnCl_2 modified peanut shell

作　　者：王东梅[1] 龚正君[1] 陈钰[1] 孙彩云[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031

出　　处：《广东农业科学》2013年第19期175-177,182,共4页Guangdong Agricultural Sciences

基　　金：中央高校基本科研业务费专项资金资助-青年教师百人计划(SWJTU09BR171);西南交通大学实验教学与实验技术项目(201202)

摘　　要：采用花生壳为原料,以50%氯化锌溶液为花生壳原料的活化剂,采用功率为640 W的微波照射4 min的改性方法制备成改性花生壳。结果表明:未改性花生壳对Cu2+的去除效果劣于改性花生壳。改性花生壳吸附Cu2+的最佳投加量为0.2 g,最适合的pH值为6,最佳的吸附时间为12 h。其动力学行为符合Lagergren的准二级反应动力学模型。The adsorbent was prepared from peanut shell by using ZnC12 as activating agent, copper in aqueous solution was used as adsorbate, the influence of pH, adsorbent dosage, temperature, contact time were investigated through dynamic tests. Then the kinetics of modified peanut shell was studied. The results showed that the modified peanut shell had maximum adsorption efficiency when the pH was 6, the dosage was 0.2 g, the temperature was 25℃ and the contact time was 12 h. By substituting experimental data into kinetics models, quasi-second-order kinetics model could better describe the kinetics of modified peanut shell adsorbing CuE＋.

关 键 词：花生壳 改性 CU2+ 吸附 动力学 

分 类 号：X703[环境科学与工程—环境工程]