化工进展2017，Vol.36Issue(7)：2554-2561,8.DOI:10.16085/j.issn.1000-6613.2016-2225
交联羧甲基淀粉的制备及其对重金属离子的吸附性能
Synthesis of cross-linked carboxymethyl starch and its adsorption properties on heavy metal ions
摘要
Abstract
Cross-linked carboxymethyl starch was synthesized by corn starch using epichlorohydrin as cross-linking agent,and chloroacetic acid as etherifying agent.The etherification reaction mechanism was discussed and the optimum reaction conditions were ascertained as follows:n(sodium hydroxide):n(acetic acid) ∶ n(starch) is 1.2 ∶ 1 ∶ 1,and the reaction temperature was 50℃.The structure was characterized by Fourier transform infrared (FTIR),X-ray diffraction (XRD) and scanning electron microscopy (SEM).When the DS was 0.581,adsorption experimental results for heavy metal ions showed that the removal rate of the CCMS on Zn(Ⅱ) and Co(Ⅱ) were 92.48％ and 93.79％,respectively,which were much higher than that of activated carbon and were better than that of acrylic acid type cation exchange resin.CCMS also had a favorable regeneration performance,after two times of regeneration the amount of adsorption was still maintained at more than 70％ of the original adsorption.This indicated that CCSM had a bright future in commercial application as a natural polymer adsorption material,and can be used as a potential substitute for synthetic resin adsorbents.关键词
交联羧甲基淀粉/重金属离子/吸附剂/再生/环境保护Key words
cross-linked carboxymethyl starch/heavy metal ions/adsorbent/regeneration/environmental protection分类
化学化工引用本文复制引用
张昊,范新宇,王建坤,郭晶,梁卡..交联羧甲基淀粉的制备及其对重金属离子的吸附性能[J].化工进展,2017,36(7):2554-2561,8.基金项目
国家自然科学基金项目(51503147). （51503147）
