| 2016—2020年云南土壤放射性水平及其变化趋势分析 |
| Analysis of Soil Radioactivity Level and Its Change Trend in Yunnan Province from 2016 to 2020 |
| 投稿时间：2022-04-28 修订日期：2023-05-15 |
| DOI：10.19316/j.issn.1002-6002.2023.05.20 |
| 中文关键词: 云南 土壤 放射性 监测分析 |
| 英文关键词:Yunnan Province soil radioactivity monitoring analysis |
| 基金项目: |
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| 通讯作者:闫俊丞* 云南省辐射环境监督站, 云南 昆明 650034 |
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| 中文摘要: |
| 根据2011—2020年云南辐射环境质量土壤国省控点238U、232Th、226Ra、40K、137Cs、90Sr的监测结果，给出云南环境土壤放射性水平，得出云南环境土壤放射性水平总体平稳；云南环境土壤国省控点238U、232Th、226Ra、40K的监测结果与云南省环境天然放射性水平调查结果相近，与云南土壤238U、232Th、226Ra、40K分布趋势基本吻合；云南土壤238U、232Th、226Ra活度浓度略低于全国平均水平；由于大气迁移、沉降作用，早期核试验、核事故释放的核素137Cs、90Sr在云南环境土壤均有不同程度的检出。云南属伴生放射性矿产资源大省，滇西南某地受伴生放射性矿产采选冶影响，局部区域地表土壤放射性水平出现不同程度增高。 |
| 英文摘要: |
| Based on the monitoring results of 238U,232Th,226Ra,40K,137Cs and 90Sr in the national and provincial control points of radiation environmental quality in Yunnan Province from 2011 to 2020,the level of Yunnan's soil environmental radioactivity was given,and the results showed that the level of soil environmental radioactivity in Yunnan Province was generally stable.The monitoring results of 238U,232Th,226Ra and 40K in the national and provincial control points of Yunnan Province were similar to the investigation results of local natural environmental radioactivity levels,which were basically consistent with the distribution trends of 238U,232Th,226Ra and 40K in Yunnan Province.The activity concentrations of 238U,232Th and 226Ra in soil of Yunnan Province were slightly lower than the national average.Influenced by atmospheric migration and sedimentation,137Cs and 90Sr released from the early nuclear test and nuclear accident were detected in different degrees in soil of Yunnan.Yunnan is a province with large associated radioactive mineral resources.The radioactive level of surface soil in a certain area of southwest Yunnan has increased due to the influence of mining and smelting of associated radioactive mineral resources. |
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