期刊论文

Wang, J.-S.(xhwjs@163.com)

中文

原子能科学技术

1000-6931

2013

47

4

540-545

10.7538/yzk.2013.47.04.0540

国家自然科学基金资助项目（21177053）；

本校为第一且通讯机构

利用接枝共聚的方法制备了β-环糊精交联磁性壳聚糖,并将其用于吸附水溶液中的U(Ⅵ),考察了溶液初始pH、吸附时间、温度等因素对U(Ⅵ)去除率的影响。吸附实验结果表明:β-环糊精交联磁性壳聚糖对U(Ⅵ)的吸附平衡时间为60min;温度越低,吸附剂投加量越大;溶液初始pH在3.0～6.0的弱酸性范围内有利于β-环糊精交联磁性壳聚糖对U(Ⅵ)的吸附。解吸实验结果表明,β-环糊精交联磁性壳聚糖经5次解吸后对U(Ⅵ)的吸附去除率仅下降7.41%。SEM表明,β-环糊精交联磁性壳聚糖表面粗糙。IR分析显示,β-环糊精交联磁性壳聚糖表面的—OH、—NH_2是U(Ⅵ)结合的主要位点,吸附U(Ⅵ)后并未明显改变原有结构。

A β-cyclodextrin cross-linked magnetic chitosan, prepared by the method of graft copolymer, was used to adsorb U(VI) from aqueous solution. The effects of initial solution pH, adsorption time, temperature and other factors on U(VI) removal rate by β-cyclodextrin cross-linked magnetic chitosan were studied. The adsorption experimental results show that the adsorption equilibrium time of U(VI) onto β-cyclodextrin cross-linked magnetic chitosan is 60 min, and low temperature and high adsorbent dosage are beneficial for the adsorption. The optim...