木薯交联羧甲基淀粉吸附铅离子的试验研究  

Adsorption of Pb^(2+) in Wastewater Using Cassava Cross-linking Carboxymethylated Starch

作　　者：谭义秋[1] 翁艳英[1] 慕光杉[1] 

机构地区：[1]广西民族师范学院化学与生物工程系,广西崇左532200

出　　处：《湿法冶金》2013年第6期398-402,共5页Hydrometallurgy of China

基　　金：广西自然科学基金资助项目(2010GXNSFA013049);广西高校优秀人才资助计划项目[桂教人(2011)40号];广西高等学校重点资助科研项目(201202ZD094);广西民族师范学院重点科研项目(XYZD2011002)

摘　　要：采用搅拌球磨机对木薯淀粉机械活化,以活化60min的木薯淀粉为原料,干法合成交联羧甲基淀粉吸附剂。考察了交联羧甲基淀粉的取代度、溶液pH、Pb2+初始质量浓度、吸附时间、用量等因素对交联羧甲基淀粉吸附Pb2+的影响。结果表明:交联羧甲基淀粉对Pb2+有很好的吸附作用;用取代度为0.763的交联羧甲基淀粉吸附溶液中的Pb2+,在Pb2+初始质量浓度40mg/L、pH=7.0、交联羧甲基淀粉用量0.10g、吸附时间40min条件下,吸附容量为18.6mg/g,吸附率为93.1%。The cross-linking carboxymethylstarch adsorbent was prepared by dry method using cassava starch,mechanically activated for 60 min by a stirring-type ball mill,as a starting material. The effects of substitution degree （Ds） of cross-linking carboxymethylstarch, solution pH, Pb2＋ initial concentration, adsorption time, and the starch dosage on adsorption abilities of the cross-linking carboxymethylstarch for Pb2＋ were investigated. The results indicate that the adsorption abilities of the cross-linking carboxymethylstarch for Pb2＋ is good. Treated solution of containing Pb2＋ by the cross-linking carboxymethylstarch （D=0. 763）, the adsorption capacity for Pb2＋ is 18.6 mg/g, and the adsorption rate for Pb2＋ is 93.1%, when the dosage of the cross-linking carboxymethylstarch is 0.10 g,Pb2＋ initial concentration is 40 mg/L,solution pH is 7.0 ,adsorption time is 40 rain.

关 键 词：木薯淀粉 交联羧甲基淀粉 铅离子 吸附 

分 类 号：TQ424.3[化学工程]