期刊论文

中文

应用化工

1671-3206

2014

43

3

427-431,434

10.16581/j.cnki.issn1671-3206.2014.03.015

湖南省自然科学基金资助项目（12JJ6014）；

本校为第一机构

采用两步法合成磁性胺肟基功能化CMC(简称PAO/CMC/Fe_3O_4),用批示法研究了PAO/CMC/Fe_3O_4对U(VI)的吸附行为,考察了pH值、吸附时间、吸附剂用量等对吸附效果的影响。结果表明,PAO/CMC/Fe_3O_4对U(VI)的吸附容量大,速度快,最大吸附容量119.21 mg/g,30 min左右达到吸附平衡,平衡数据符合Langmuir等温方程,符合伪二阶动力学吸附模型,说明PAO/CMC/Fe_3O_4对U(VI)的化学吸附过程是速率控制步骤。

Magnetic functional composite of polyamidoxime （PAO）-grafted magnetic carboxymethylated cellulose （CMC/Fe3O4） was prepared by two-step method.The adsorptive features of PAO/CMC/Fe3O4 for UO22＋ with respect to pH,adsorbent dose,contact time were investigated using batch sorption techniques.The results showed that the maximum adsorption capacity of the magnetic composite toward U（Ⅵ） was 119.21 mg/g.Equilibrium data were well described by the Langmuir sorption isotherm.Suitable adsorption kinetics was found,and the process followed pseudo-...