蚌埠市2011～2017年度饮用水源地地表水总α、总β放射性水平监测分析

Monitoring and analysis of the total α and total β radioactivity levels in surface water in Bengbu from 2011 to 2017

目的:采样监测了蚌埠市2011~2017年度饮用水源地地表水中总α、总β放射性水平,了解饮用水源地地表水中总α、总β放射性本底水平和分布特点。方法:采用国家标准方法对总α、总β放射性活度进行了监测,并对监测结果进行了分析评价。结果:总β放射性水平整体较总α高;枯水期与丰水期无明显规律性;总α和总β放射性活度浓度范围分别为0.003~0.08 Bq/L和0.10~0.33 Bq/L;估算蚌埠居民通过饮用水摄入总α和总β放射性核素所致年均内照射有效剂量范围分别是(1.3~14.4)×10-3 m Sv/a和(4.8~10.6)×10-4 m Sv/a;均符合国家标准限值。结论:蚌埠市饮用水源地地表水中总α和总β放射性水平在正常本底范围内,未见总放射性含量异常。

Aim:To monitor total levels ofαand totalβradioactivity,and to find out their back ground levels and distribution in the surface water in Bengbu from 2011 to 2017.Method:The totalαand totalβradioactivity of surface water samples were monitored and results were analyzed according to the national standard.Result:The level of totalβradioactivity was overall higher than that of totalαradioactivity;There was no obvious regularity between dry season and rainy season;The activity concentration of totalαandβwere in the range of 0.003-0.08 Bq/L and 0.10-0.33 Bq/L;The per-capita annual effective dose due to drinking water in Bengbu was(1.3-14.4)×10-3 mSv/a and(4.8-10.6)×10-4 mSv/a;The results are in line with national standards.Conclusion:The level of totalαand totalβof surface water in Bengbu fall in the range of normal background.