交联阳离子淀粉对重金属离子的吸附性能研究  

Study on absorption of cross-linked cationic starch to heavy metal ions

作　　者：韩怀芬[1] 褚淑祎[1] 陈建孟[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2005年第1期74-77,共4页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金项目(401001)

摘　　要：对常规的阳离子淀粉先进行交联,制得交联阳离子淀粉.研究了pH,金属离子的初始质量浓度、药剂投加量、接触时间对重金属离子(主要是Cr3+,Cu2+,Pb2+和Cd2+)吸附性能的影响,发现当重金属离子初始质量浓度=50mg/L、吸附剂投加量=0.5g/L,接触时间=30min时,Pb2+,Cu2+,Cr3+在pH=6时吸附容量达到最大,分别为97.94%,99.46%,84.30%,而Cd2+在pH=7时达到最大,其值为99.36%,交联阳离子淀粉对Cr( )的吸附效果不大,仅为29.38%.此外,运用红外光谱对反应机理初步进行了探索.The cross-linked starch was prepared by reacting maize starch with cationic cetherifying agent( HTA). The starch so prepared was used in heavy-metal ions(mainly divalent metal ions) removal from solutions. The absorption ability of the starch depended on pH, reaction time, starch content and metal ions. It showed that the absorption capacity of Pb^(2+), Cu^(2+), Cr^(3+) reached a maximum value when the metal concentration was 50 mg/L, the reaction time was 30min and the pH was 6, while the absorption of Cd^(2+) reached a maxium value at pH 7. The maxium value of Pb^(2+), Cu^(2+), Cr^(3+) and Cd^(2+) was separately 97.94%, 99.46%, 84.30% and 99.36%. The absorption of Cr(Ⅵ) was not very good. In addition, the mechanism was discussed by using the infrared spectrum.

关 键 词：重金属离子 CD^2+ 质量浓度 PB^2+ 投加量 吸附性能 CU^2+ 交联 吸附剂 研究 

分 类 号：X703[环境科学与工程—环境工程] X172