摘要
为评价γ辐照对AG1-×8树脂吸附^(99)Mo的影响,选择吸收剂量分别为37.5、275、825 kGy的AG1-×8树脂,通过静态和动态实验,研究AG1-×8树脂对Mo(Ⅵ)的吸附性能。结果表明,经γ辐照后,AG1-×8树脂表面形态未发生变化及破损;AG1-×8树脂对Mo(Ⅵ)的静态分配系数随吸收剂量的增加而减小;AG1-×8树脂辐照前后对Mo(Ⅵ)的静态分配系数在NH_(4)OH介质中不随介质浓度变化,而在硝酸、氢氧化钠、碳酸铵介质中随浓度的增加而减小;在1 mol/L氨水介质中,AG1-×8树脂辐照前后对Mo(Ⅵ)吸附行为符合Langmuir等温模型,吸附过程为自发、吸热过程,饱和吸附容量分别为74.07、71.02、70.97、57.57 mg/g;Mo(Ⅵ)在NH_(4)OH中吸附、用1 mol/L碳酸铵溶液解吸,Mo(Ⅵ)回收率随吸收剂量的增大而降低。
To evaluate the influence of gamma irradiation on adsorption of ^(99)Mo on AG1-×8 resin,three irradiated AG1-×8 resin with absorbed doses of 37.5 kGy,275 kGy and 825 kGy were chosen to investigate the adsorption properties of Mo(Ⅵ)on AG1-×8 resin via the static absorption and the dynamic adsorption experiments.The experimental results showed that no difference of the surface of AG1-×8 resin was observed compared to non-irradiated resin.The static distribution coefficient of Mo(Ⅵ)adsorbed by resin decreased with the increase of absorbed doses,and the static distribution coefficient of Mo(Ⅵ)adsorbed by irradiated and non-irradiated resin was not variable in different concentration of NH_(4)OH but decreased with increasing the concentration of HNO_(3),NaOH,and(NH_(4))_(2)CO_(3).The sorption on irradiated and non-irradiated resin both followed Langmuir isotherm model,indicating that each of these adsorption processes was spontaneous and endothermic in nature,and the static saturated adsorption capacity was 74.07 mg/g,71.02 mg/g,70.97 mg/g and 57.57 mg/g in 1 mol/L NH_(4)OH,respectively.While Mo(Ⅵ)was adsorbed in NH_(4)OH and desorbed with 1 mol/L(NH_(4))_(2)CO_(3),the recovery yield of Mo(Ⅵ)decreased with the increase of absorbed doses.
作者
吴宇轩
梁积新
黄文博
向学琴
沈亦佳
于宁文
吴如雷
赵婧妍
罗志福
WU Yuxuan;LIANG Jixin;HUANG Wenbo;XIANG Xueqin;SHEN Yijia;YU Ningwen;WU Rulei;ZHAO Jinyan;LUO Zhifu(Department of Nuclear Technology and Application,China Institute of Atomic of Energy,Beijing 102413)
出处
《同位素》
CAS
2021年第6期509-517,共9页
Journal of Isotopes
基金
国防科工局“十三五”核能开发科研第六批项目(后补助)
核技术创新联合基金(U1967216)。
