摘要
以高庙子膨润土作为吸附介质,通过静态吸附实验,研究了高庙子膨润土在不同水相环境中对核素239Pu的吸附行为。探讨了接触时间、水相pH值、离子种类以及离子浓度等因素对吸附行为的影响。研究结果表明:高庙子膨润土对钚具有很强的吸附能力,吸附率达到99%以上,且吸附速率较快,4d即可达到吸附平衡。随着水相pH值增大,膨润土对钚的吸附能力逐渐增强。水相中CO23-、Fe3+和Ca2+对钚吸附有较强抑制作用,并且当离子浓度小于0.02mol/L时,随着浓度的增大,分配系数Kd值逐渐减小;当离子浓度大于0.02mol/L时,分配系数Kd值基本趋于稳定。
The adsorption of ^239Pu on Gaomiaozi（GMZ） bentonite was studied in different ionic environment by the static adsorption experiment. The influence of the contact time,pH, the different kinds of ions and ionic concentration on the adsorption behavior was also studied. The experimental results show the adsorption ability of ^239Pu on GMZ bentonite is good, and the adsorption rate is fast, four days it can achieve adsorption equilibrium. The adsorption capacity of bentonite to ^239Pu increases with increasing of pH value in water phase. The adsorption of ^239Pu on GMZ bentonite is strongly hindered by CO3^2- , Fe^3＋ and Ca^2＋. The Kd value increases with the concentration increasing while ionic concentration less than 0.02 mol/L. The Kd value is not affected by ionic concentration while ionic concentra- tion more than 0.02 mol/L.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2013年第4期247-251,共5页
Journal of Nuclear and Radiochemistry
基金
国家杰出青年科学基金资助项目(41025015)
四川省青年科技创新研究团资助项目(2011JTD0013)
