长江沿岸部分NORM行业水中^(210)Po的分析

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

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^(210)Po的浓度。结果表明,燃煤电厂、水泥厂、钢铁厂、铁矿排出水口中^(210)Po的活度浓度分别为(0.93~4.76)×10-3Bq/L、(1.12±0.07)×10-2Bq/L、(9.89±0.78)×10-3Bq/L、(2.17±0.21)×10-3Bq/L,均在长江水系^(210)Po的波动范围之内。稀土加工排放的废水和雨水中^(210)Po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。

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 of210Po concentrations in the Yangtze River. The activities of210Po 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.