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| Distribution Characteristics and Evaluation of Radioactivity in Linshui River |
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Received:October 20, 2016
Revised:October 24, 2016
Accepted:October 31, 2016
Published Online:January 22, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.02.015 |
| KeyWord:Linshui River; radionuclides; distribution characteristics; pollution evaluation |
| Author | Institution |
| DING Xiaoyan |
东华理工大学核资源与环境省部共建国家重点实验室培训基地 |
| ZHANG Chunyan |
东华理工大学水资源与环境工程学院 |
| GAO Bai |
东华理工大学核资源与环境省部共建国家重点实验室培训基地 |
| LIU Yuanyuan |
东华理工大学核资源与环境省部共建国家重点实验室培训基地 |
| JIANG Yafei |
东华理工大学核资源与环境省部共建国家重点实验室培训基地 |
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| Abstract: |
| Distribution characteristics of radionuclides (U, Th) in Linshui River were studied. Pollution of water was evaluated to calculate internal dose level of radionuclides of residents. The results show that ranges of radionuclides concentrations are 1.1~8.2 μg/L for uranium and 0.5~8.18 μg/L for thorium. Contents of U and Th rise when sampled closer to sampling site of uranium ore. Overall, contents of U and Th in river trend to drop along the way. Comprehensive evaluation of radionuclides (U, Th) in river, performed by Nemerow''s Pollution Index (NPI) as against background values of sampling sites NO.1 locating in upstream of uranium district, indicates that the river is subjected to different levels of radioactive contamination with the highest level of NPI reaching 10.37 as hazardous level. Radionuclides (U, Th) lead to the maximal effective dose of 8.84×10-6 Sv, lower than the recommended level of WHO, suggest that radionuclides in the river are of no or a little harm for human health for now. Monitoring and research on the river water are recommended to continue with migration and accumulation of radionuclides into consideratioin. |
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