期刊论文

中文

南华大学学报(自然科学版)

1673-0062

2016

30

4

11-15

10.19431/j.cnki.1673-0062.2016.04.003

国家自然科学基金资助项目(11675072)；

本校为第一机构

采用自制的二氧化硅胶体聚合体,进行了pH值、接触时间和铀初始浓度对二氧化硅胶体聚合体吸附铀效果影响试验,结果表明,溶液的pH对二氧化硅胶体聚合体吸附铀的效果影响较大,并且在pH为4时吸附铀的效果达到最佳;二氧化硅胶体聚合体吸附铀的速度快,30 min即可达到吸附平衡;该材料去除铀的效率高,当溶液中铀初始浓度低于10 mg/L时,该材料对铀的去除率大于98%;随着初始铀浓度增加,吸附容量增加,铀的去除率降低;扫描电镜分析结果表明,二氧化硅胶体聚合体表面形貌吸附铀前后变化不大;能谱分析结果表明,1 g吸附剂所吸附铀的质量分数为4.32%,与二氧化硅胶体聚合体从溶液中吸附铀43.0 mg相吻合.

The aim of this study was to explore the adsorption behavior of uranium( VI) on self￣made SiO2 colloids polymer.The influences of pH value,contact time and the initial u￣ranium(VI) concentration on the adsorption course was analyzed.The result shown that pH value had important influences on the adsorption course,pH=4 is the optimal condition for uranium(VI) adsorption,in that condition, the absorb speed of uranium(VI) onto SiO2 colloids polymer is fast,adsorption equilibrium time is less than 30 minutes.For a 10 mg/L uranium( VI) concentratio...