期刊论文

Xie, S.(xiesbmr@263.net)

中文

化工学报

0438-1157

2013

64

7

2488-2496

10.3969/j.issn.0438-1157.2013.07.025

supported by the National Natural Science Foundation of China 国家自然科学基金项目 the Science and Technology Project of Hunan Province 湖南省科技计划重点项目

本校为第一且通讯机构

采用戊二醛交联海藻酸钠固定化的腐殖酸,制备得到多孔性薄膜(GA-HA/SA),用于去除含铀废水中的铀(Ⅵ)。通过静态吸附实验,研究了pH值、初始浓度、接触时间、温度对GA-HA/SA吸附U(Ⅵ)效果的影响,进行了吸附过程的热力学与动力学分析;通过红外光谱(FTIR)、扫描电镜(SEM)、X射线能谱(EDS)探讨了相关吸附机理。实验结果表明,pH值为6时吸附效果最好,吸附在60min基本达到平衡。吸附过程符合Langmuir和Dubinin-Radushkevich(D-R)等温模型;25℃时,最大吸附容量为312.5mg·g~(-1)。吸附动力学过程符合准二级速率方程(R~2>0.99),吸附速率的控速步骤为颗粒内扩散。GA-HA/SA对U(Ⅵ)的吸附是自发的吸热反应。S...

Glutaraldehyde crosslinked humic acid-immobilized sodium alginate was used to develop a novel porous composite membrane adsorbent (GA-HA/SA) for the removal of uranium (VI) ions from uranium-contained wastewater. The physicochemical properties of GA-HA/SA before and after adsorption were investigated by FTIR, SEM and EDX methods. To investigate the effects of experimental parameters on adsorption behavior, batch experiments were performed by changing solution pH, initial concentration of U(VI) ions, contact time and temperature. The experimenta...