广西城市集中式饮用水水源放射性水平调查与研究

Investigation and study on the radioactive level of centralized drinking water sources in Guangxi Zhuang Autonomous Region

目的调查广西14个主要城市的50个集中式饮用水水源中总α、总β、铀、钍和镭-226浓度水平,为广西辐射环境管理积累基础数据资料。方法依据《辐射环境监测技术规范》(HJ/T 61—2001)开展调查,水中总α、总β、铀、钍和镭-226的相关分析方法进行样品分析。结果广西城市集中式饮用水水源中总α、总β、铀、钍和镭-226的监测结果范围分别为<0.008~0.122 Bq/L、0.014~0.250 Bq/L、0.031~0.909μg/L、0.063~0.709μg/L和1.00~53.1 mBq/L。结论广西城市集中式饮用水水源放射性处于天然环境本底水平,总α、总β浓度均不超过《生活饮用水卫生标准》中的放射性指标指导值,地下水型饮用水水源符合《地下水质量标准》中Ⅲ类水水质放射性指标要求。北海市城市集中式饮用水水源放射性水平属广西14个城市中最高。

Objective To investigate the concentrations of gross α,gross β, Uranium, Thorium and Radium-226 in 50 concentrated drinking water sources in 14 major cities of Guangxi, and to accumulate basic data for radiation environmental management in Guangxi. Methods Basede on 《Technical criteria for radiation environmental monitoring》(HJ/T 61 —2001), the sample analysis was carried out by the Corresponding analytical methods of gross α, gross β, Uranium, Thorium and Radium-226 in water. Results The monitoring results of gross α, gross β, Uranium, Thorium and Radium-226 in concentrated drinking water sources in major cities in Guangxi were < 0.008~0.122 Bq/L, 0.014~0.250 Bq/L, 0.031~0.909 μg/L,0.063~0.709 μg/L and 1.00~53.1 mBq/L respectively. Conclusion The radioactivity of concentrated drinking water sources in major cities in Guangxi is at the background level of the natural environment, and the concentration of either grossα or gross β does not exceed the guiding values of radioactivity index in 《Standards for Drinking Water Quality》.Groundwater-type drinking water sources conforms to the requirements of Grade Ⅲ water quality radioactivity index in 《Standards for Groundwater Quality》. The radioactive level of the city’s centralized drinking water source in Beihai City is the highest among the 14 major cities in Guangxi.