Pu在地下水溶液中的形态及吸附行为

Using GMZ bentonite as an adsorption medium and pure water and a certain groundwater in Alxa as solutions, the relationships between the adsorption equilibrium time of Pu in GMZ bentonite, the relationship between the initial concentration of Pu and the adsorption amount, and the influence of different concentrations of pH values on the adsorption of Pu were studied. The speciation of Pu in the aqueous solution was simulated and calculated using the PHREEQC software. The research shows that under the experimental conditions, the adsorption equilibrium time of Pu on GMZ bentonite is 20 h, the adsorption effect in a neutral environment is greater than that in an acidic environment, and the adsorption effect in a pure water solution is greater than that in a certain groundwater solution in Alxa. Through simulated speciation analysis, the speciation in the solution has a certain influence on the adsorption effect. In an acidic solution, it is mainly Pu~(3+), in a neutral solution, it is mainly Pu(OH)_3~+, and in an alkaline solution, it is mainly Pu(OH)_4.

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.