Pu在地下水溶液中的形态及吸附行为  

Speciation and adsorption behavior of Pu in groundwater

作　　者：成建峰[1] 冷阳春[2] 赖捷[2] 朱杉[1] 庹先国[1,2,3] 

机构地区：[1]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 [2]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 [3]四川理工学院,自贡643000

出　　处：《环境化学》2017年第7期1630-1635,共6页Environmental Chemistry

基　　金：国家自然科学基金(41630646);四川省非金属复合与功能材料重点实验室(15zxfk07);四川省科技计划项目(2014JY0206)资助~~

摘　　要：以GMZ膨润土为吸附介质,纯水和阿拉善某地下水为溶液,研究了Pu在GMZ膨润土中的吸附平衡时间关系、Pu初始浓度与吸附量的关系、不同浓度pH值对Pu的吸附影响.用PHREEQC软件模拟计算了水溶液中Pu的形态.研究表明,实验条件下GMZ膨润土对Pu的吸附平衡时间为20 h,中性环境中吸附效果大于酸性环境中的吸附效果,纯水溶液中的吸附效果大于阿拉善某地下水溶液中的吸附效果,通过模拟形态分析,溶液中的形态对吸附效果产生一定影响,在酸性溶液中主要是Pu^(3+),中性溶液中主要是Pu(OH)^(+3),碱性溶液中主要是Pu(OH)_4.Adsorption kinetics of Pu in GMZ bentonite was studied in pure water and Alashan groundwater. The effect of initial concentration and pH on the adsorption of Pu in GMZ bentonite was investigated. Speciation of Pu in water was also calculated by PHREEQC simulation software. The results showed that adsorption of Pu in GMZ bentonite reached equilibrium after 20 h, and the adsorption of Pu in GMZ bentonite in neutral solution and pure water were better than that in acidic solution and Alashan groundwater, respectively. Simulation analysis results showed that speciation of Pu in acidic, neutral and alkaline solution were mainly Pu3＋,Pu（OH）3＋, and Pu（OH）4, respectively.

关 键 词：形态 膨润土 吸附 钚 

分 类 号：X523[环境科学与工程—环境工程] X771