离子交换法处理^60Co污染的γ辐照装置源井水  

Ion exchange-based treatment of 60Co contaminated well-water for storing γ irradiation source

作　　者：毕梦[1] 缪世林[2] 张晓露[3] 张友九[1] 

机构地区：[1]苏州大学医学部放射医学与防护学院江苏省放射医学与防护重点实验室,215123 [2]苏州大学医学部,215123 [3]苏州大学卫生与环境技术研究所,215123

出　　处：《中华放射医学与防护杂志》2014年第8期617-620,共4页Chinese Journal of Radiological Medicine and Protection

基　　金：核技术利用与辐射安全监管技术支持项目（JG201211）;江苏高校优势学科建设工程资助项目（PAPD）

摘　　要：目的 选择合适的离子交换树脂处理60Co污染的贮源井水,使污染的贮源井水中放射性水平低于10 Bq/L,满足排放要求.方法 通过亚硝酸钴钾共沉淀-β计数法测量水样中60Co的活度,比较两种不同离子交换树脂处理60Co污染模拟井水的效果,并选择净化效果较好的离子交换树脂处理^60Co污染的源井水.结果 MBD-15-SC型混合离子交换树脂对模拟井水中60Co净化效果明显高于ZGCNR50型强酸性阳离子交换树脂,大约为5.8倍;采用多次两级MBD-15-SC型混合离子交换树脂循环处理污染的源井水,可使水中60Co放射性浓度从4.16×10^5 Bq/L降至1.16 Bq/L.结论 采用多次两级MBD-15-SC型混合离子交换树脂可有效处理60 Co污染的源井水,处理后的贮源井水符合排放要求.Objective To select an efficient ion exchange resin to purify the 60Co contaminated well-water for storing radioactive source and to ensure the radioactivity of 60Co in treated well-water below 10 Bq/L.Methods The radioactivity of 60Co in the water samples was measured by using the potassium cobaltinitrite coprecipitation-β counting method.The treatment efficiencies of two different ion exchange resins for the simulated 60Co-bearing waste water were compared to select a better one to dispose of the 60Co contaminated well-water.Results The treatment efficiency of MBD-15-SC mixed ion exchange resin was about 5.8 times higher than ZGCNR50 strong-acid cation exchange resin.The radioactivity of 60Co in the contaminated well-water could be reduced from 4.16 × 10^5 Bq/L to 1.16 Bq/L by two-stage sorption of MBD-15-SC mixed ion exchange resin.Conclusions Using several times of two-stage MBD-15-SC mixed ion exchange resin could effectively purify the 60Co contaminated well-water.The quality of the treated well-water could meet the sewage discharge standards.

关 键 词：离子交换法 ^60CO 贮源井水 

分 类 号：R144[医药卫生—公共卫生与预防医学]