期刊论文

Xia, Liang-Shu

中文

原子能科学技术

1000-6931

2014

48

12

2187-2194

10.7538/yzk.2014.48.12.2187

湖南省自然科学基金与衡阳市自然科学联合基金资助项目（14JJ5019）； 湖南省高等学校科研项目重点项目资助（12A120）；

本校为第一且通讯机构

通过静态吸附实验,研究了用十六烷基三甲基溴化铵(HDTMA·Br)改性的蛭石对U(Ⅵ)的吸附行为,以及有机改性蛭石(吸附剂)用量、pH值、铀初始质量浓度、吸附时间等因素对有机改性蛭石吸附 U(Ⅵ)效果的影响,从热力学和动力学方面对吸附过程进行了分析,并通过FT-IR和SEM 探讨了其相关吸附机理。结果表明:增加吸附剂用量、延长吸附时间和降低铀初始质量浓度都能提高有机改性蛭石对铀的去除率,最佳吸附pH值为6.5左右,120min达到吸附平衡;用絮凝剂协同吸附能提高有机改性蛭石对铀的吸附效果;有机改性蛭石对铀的吸附遵循Langmuir吸附等温线,符合准二级动力学方程。有机改性蛭石吸附铀前后的FT-IR表明,—OH...

The adsorption behavior of U(VI) on modified vermiculite by HDTMA·Br was studied with static experiments. The effects of the amount of adsorbent, pH, initial mass concentration of uranium and time on the removal rate of uranium were investigated. The unit mass of adsorption process was analyzed in thermodynamics and kinetics, and the adsorption mechanism was analyzed with FT-IR and SEM. The results indicate that the removal rate of uranium can increase with the increase of adsorbent amount and time, and the decrease of initial mass concentrati...