2012—2020年杭州市区水中^(90)Sr和^(137)Cs放射性水平调查  

Investigation on ^(90)Sr and ^(137)Cs activity concentrations in water in Hangzhou urban area from 2012 to 2020

作　　者：王鹏 曹艺耀[1] 任鸿 周磊 邹华[1] 俞顺飞[1] 赵尧贤[1] 赖忠俊 宣志强[1] Wang Peng;Cao Yiyao;Ren Hong;Zhou Lei;Zou Hua;Yu Shunfei;Zhao Yaoxian;Lai Zhongjun;Xuan Zhiqiang(Zhejiang Province Center for Disease Control and Prevention,Hangzhou 310051,China)

机构地区：[1]浙江省疾病预防控制中心,杭州310051

出　　处：《中华放射医学与防护杂志》2023年第8期627-632,共6页Chinese Journal of Radiological Medicine and Protection

基　　金：浙江省基础公益研究计划项目(LGC21H260001);浙江省卫生健康科技计划(2019KY353,2021KY613,2021KY616,2022KY132,2022KY130,2022RC120,2022ZH030);浙南放射医学与核技术应用研究院开放课题(ZFY-2021-K-003,ZFY-2022-K-001,ZFY-2022-K-006)。

摘　　要：目的调查分析杭州市区水中90 Sr和137 Cs放射性水平和来源。方法2012—2020年,选取杭州市区3个水质监测点:钱塘江水(杭州市重要饮用水源)、末梢水(居民直接饮用水)、西湖水(游客密集区域,水体每月与钱塘江水交换1次),分别在丰水期和枯水期采集水样并用放射化学法测定样品中^(90)Sr和^(137)Cs的活度浓度,根据137 Cs和90 Sr活度浓度获得活度比(^(137)Cs/^(90)Sr)。结果2012—2020年,末梢水中90 Sr和137 Cs的活度浓度范围分别为(2.0±1.1)~(7.4±0.4)mBq/L,(0.45±0.06)~(7.1±0.6)mBq/L,^(137)Cs/^(90)Sr活度比值范围为0.07~2.40;钱塘江水中90 Sr和137 Cs的活度浓度范围分别为(3.7±1.1)~(17.0±4.4)mBq/L,(0.28±0.01)~(15.0±4.5)mBq/L,^(137)Cs/^(90)Sr活度比值范围为0.03~0.90;西湖水中^(90)Sr和^(137)Cs的活度浓度范围分别为(2.2±0.5)~(11.0±2.0)mBq/L,(0.32±0.04)~(7.9±1.9)mBq/L,^(137)Cs/^(90)Sr活度比值范围为0.05~1.20。结论杭州市区水中^(90)Sr和^(137)Cs活度浓度处于本底水平,远低于世界卫生组织《饮用水质量指导标准第四版》建议的浓度限值(^(90)Sr和^(137)Cs均为10 Bq/L)。Objective To investigate the activity concentrations of ^(90)Sr and ^(137)Cs in water in Hangzhou urban area.Methods From 2012 to 2020,Qiantang River water as an important drinking water source,tap water as direct drinking water for residents,and West Lake water in tourists crowded area were selected forwater quality monitoring with respect to conctnts of ^(90)Sr and ^(137)Cs.The activity concentrations of ^(90)Sr and ^(137)Cs in water samples,as collected in wet and dry seasons resepectively,were determined by radiochemical analysis,with the ^(137)Cs to ^(90)Sr activity ratios obtained.Results From 2012 to 2020,the activity concentrations of ^(90)Sr and ^(137)Cs in tap water were(2.0±1.1)-(7.4±0.4)mBq/L and(0.45±0.06)-(7.1±0.6)mBq/L,respectively.The ^(137)Cs to ^(90)Sr activity ratios ranged from 0.07 to 2.40.The activity concentrations of ^(90)Sr and ^(137)Cs in Qiantang River were(3.7±1.1)-(17.0±4.4)mBq/L and(0.28±0.01)-(15.0±4.5)mBq/L,respectively.The ^(137)Cs to ^(90)Sr activity ratios ranged from 0.03 to 0.90.The activity concentrations of ^(90)Sr and ^(137)Cs in West Lake water were(2.2±0.5)-(11.0±2.0)mBq/L and(0.32±0.04)-(7.9±1.9)mBq/L,respectively.The ^(137)Cs to ^(90)Sr activity ratios ranged from 0.05 to 1.20.Conclusions The activity concentrations of ^(90)Sr and ^(137)Cs in water in Hangzhou urban area were at the background levels,lower than the concentration limits,10 Bq/L both for ^(90)Sr and ^(137)Cs recommended by WHO in the 4th edition of Guidelines for Drinking Water Quality.

关 键 词：杭州 水 放射性核素 ^(137)Cs/^(90)Sr活度比 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]