钙基膨润土和钠基膨润土对Pu的吸附行为  

Sorption behavior of Pu on Ca-bentonite and Na-bentonite

作　　者：冷阳春[1] 庹先国[2,3] 宿吉龙[1] 岳萍[1] 

机构地区：[1]成都理工大学核技术与自动化工程学院,成都610059 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059 [3]西南科技大学核废物与环境安全国防重点学科实验室,绵阳621010

出　　处：《环境化学》2014年第8期1321-1325,共5页Environmental Chemistry

基　　金：国家杰出青年科学基金(41025015);四川省青年科技创新研究团队项目(2011JTD0013)资助

摘　　要：通过静态吸附实验,探讨了在不同条件下,钙基膨润土和钠基膨润土对239Pu的吸附行为.结果表明,钙基膨润土对钚的吸附能力强于钠基膨润土;固液比的增大有助于膨润土对钚的吸附,但达到一定值后对吸附不再产生影响;两种膨润土的吸附能力均随着水相pH的增大而增强,但随着CO2-3和Fe3+离子浓度的增大而减弱;此外,两种膨润土对Pu的吸附行为均可用Freundlich等温式表示.The adsorption behavior of 239Pu on Ca-bentonite and Na-bentonite was studied by static adsorption experiments under different conditions. The results show that the Ca-bentonite adsorption capacity was stronger than that of Na-bentonite. High solid/liquid ratios help the adsorption of 239Pu on the two bentonites. Howerer, the adsorption would maintain unchanged when the ratios reached certain values. Adsorption capacity of the two bentonites increased with the increase of pH, and declined with the addition of CO2-3 and Fe3＋in aqueous solution. Besides, the adsorption of 239Pu on the two bentonites can be described by the Freundlich isotherm well.

关 键 词：PU 膨润土 吸附行为 分配系数 

分 类 号：TL942[核科学技术—辐射防护及环境保护] X53[环境科学与工程—环境工程]