| 王鹏,曹艺耀,任鸿,周磊,邹华,俞顺飞,赵尧贤,赖忠俊,宣志强.2012—2020年杭州市区水中90Sr和137Cs放射性水平调查[J].中华放射医学与防护杂志,2023,43(8):627-632 |
| 2012—2020年杭州市区水中90Sr和137Cs放射性水平调查 |
| Investigation on 90Sr and 137Cs activity concentrations in water in Hangzhou urban area from 2012 to 2020 |
| 投稿时间：2023-03-11 |
| DOI：10.3760/cma.j.cn112271-20230311-00070 |
| 中文关键词: 杭州 水 放射性核素 137Cs/90Sr活度比 |
| 英文关键词:Hangzhou Water Radionuclide 137Cs to90Sr activity ratio |
| 基金项目: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） |
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| 中文摘要: |
| 目的 调查分析杭州市区水中90Sr和137Cs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90Sr和137Cs的活度浓度，根据137Cs和90Sr活度浓度获得活度比（137Cs/90Sr）。结果 2012—2020年，末梢水中90Sr和137Cs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，137Cs/90Sr活度比值范围为0.07~2.40；钱塘江水中90Sr和137Cs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，137Cs/90Sr活度比值范围为0.03~0.90；西湖水中90Sr和137Cs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，137Cs/90Sr活度比值范围为0.05~1.20。结论 杭州市区水中90Sr和137Cs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（90Sr和137Cs均为10 Bq/L）。 |
| 英文摘要: |
| Objective To investigate the activity concentrations of 90Sr and 137Cs 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 90Sr and 137Cs. The activity concentrations of 90Sr and 137Cs in water samples, as collected in wet and dry seasons resepectively, were determined by radiochemical analysis, with the 137Cs to 90Sr activity ratios obtained.Results From 2012 to 2020, the activity concentrations of 90Sr and 137Cs 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 137Cs to 90Sr activity ratios ranged from 0.07 to 2.40. The activity concentrations of 90Sr and 137Cs 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 137Cs to 90Sr activity ratios ranged from 0.03 to 0.90. The activity concentrations of 90Sr and 137Cs 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 137Cs to 90Sr activity ratios ranged from 0.05 to 1.20.Conclusions The activity concentrations of 90Sr and 137Cs in water in Hangzhou urban area were at the background levels, lower than the concentration limits, 10 Bq/L both for 90Sr and 137Cs recommended by WHO in the 4th edition of Guidelines for Drinking Water Quality. |
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