长江沿岸部分NORM行业水中210Po的分析

人类所受辐射照射主要来源于天然辐射。本工作分析了长江沿岸部分NORM行业水中²¹⁰Po的浓度。结果表明,燃煤电厂、水泥厂、钢铁厂、铁矿排出水口中²¹⁰Po的活度浓度分别为(0.93～4.76)×10^-3 Bq/L、(1.12±0.07)×10^-2 Bq/L、(9.89±0.78)×10^-3 Bq/L、(2.17±0.21)×10^-3 Bq/L,均在长江水系²¹⁰Po的波动范围之内。稀土加工排放的废水和雨水中²¹⁰Po的活度浓度分别为(1.03~1.40)×10^-1Bq/L、(3.05±0.04)×10^-1Bq/L,比本底水平高两个数量级,需要引起特别关注,有待于进一步研究。

Analysis of 210Po in water samples from some NORM industries along Yangtze River

The radiation exposure received by mankind mainly comes from natural radiation. This study investigated the levels of ²¹⁰Po in water samples from some NORM industries along the Yangtze River. The activities of ²¹⁰Po in the effluent from coal-fired power plants, a cement plant, an iron and steel making plant and an iron ore were (0.93—4.76)×10^-3 Bq/L,(1.12±0.07)×10^-2 Bq/L,(9.89±0.78)×10^-3 Bq/L and (2.17±0.21) Bq/L, which were all in fluctuation range of ²¹⁰Po concentrations in the Yangtze River. The activities of ²¹⁰Po in the effluent and rainwater from rare earth plants were as high as (1.03—1.40)×10^-1 Bq/L and (3.05±0.04)×10^-1 Bq/L, which were two orders of magnitude higher than the background level. This should be paid special attention and needs further research.