四川大学学报（自然科学版）2017，Vol.54Issue(4)：815-821,7.DOI:10.3969/j.issn.0490-6756.2017.04.025
粘土岩对铀(Ⅵ)的吸附特征研究
Study of adsorption characteristic of uranium(Ⅵ) on clay rock
摘要
Abstract
In this paper,experimental study on static absorption was carried out for Alashan clay rock on Inner Mongolia.To explore the factors which may influence absorption characteristic of U(Ⅵ) on clay rock,including contact time,U(Ⅵ) initial concentration,solid-liquid ratio,pH value,ionic type and ionic concentration.The following results are obtained.The absorption rate of U(Ⅵ) on Alashan clay rock in Inner Mongolia is quite fast with adsorption equilibrium achieved in 24 hours.The optimum adsorption ratio is 1 ∶ 200,and the optimum adsorption concentration is 160 μg · mL-1.The absorption capacity of clay rock was enlarged with the increasing of pH value.When pH value is at 8,the ability of absorption reaches the best.The absorption capacity of U (Ⅵ) is largely hindered by Ca2+ 、CO32-and HCO3-,which have a great effect on the absorption ability of U(Ⅵ).The distribution coefficients of K+ 、Na+ 、Cl-、NO3-、SO42-can be changed with the change of ionic concentration,The surface adsorption of U(Ⅵ) on clay rock is dominated by inner-sphere complexation.The studies indicate the adsorption behavior of U(Ⅵ) on clay rock has a great significance on settling high level radioactive waste in China.关键词
粘土岩/铀/吸附特征/核素迁移Key words
Clay rock/U(Ⅵ)/Adsorption characteristic/Nuclide migration分类
能源科技引用本文复制引用
赖捷,刘畅,冷阳春,成建峰,庹先国..粘土岩对铀(Ⅵ)的吸附特征研究[J].四川大学学报（自然科学版）,2017,54(4):815-821,7.基金项目
国家自然科学基金重点项目(4163000426) （4163000426）
四川省应用基础研究计划(2014JY0206) （2014JY0206）
西南科技大学研究生创新基金(16ycx002) （16ycx002）
