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| Vertical Distribution of Radionuclides and Heavy Metals in Soil Below Temporary Repositories of Solid Wastes Associated with Radioactivity in a Rare Earth Enterprise |
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Received:April 18, 2022
Revised:April 25, 2022
Accepted:April 29, 2022
Published Online:July 13, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.08.020 |
| KeyWord:rare earth; natural radioactive nuclides; heavy metal; temporary repository; pollution evaluation |
| Author | Institution |
| CHEN Bai-di |
广东省环境辐射监测中心 |
| ZHU Zhi-ru |
广东省环境辐射监测中心 |
| CHEN Zhi-dong |
广东省环境辐射监测中心 |
| WANG Zuo-he |
广东省环境辐射监测中心 |
| HUANG Zheng-xuan |
广东省环境辐射监测中心 |
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| Abstract: |
| Soil samples from 0 to 12 m soil below two temporary storage repositories of solid wastes associated with radioactivity by a rare earth smelting enterprise were taken to analyze the content and vertical distribution of natural radionuclides (238U, 226Ra and 232Th) and heavy metals (Cd, Pb, Cr, As and Hg) and compared with regional environmental background value and related standards, as well as evaluated by Geo-accumulation index and Nemerow pollution index methods. The results show that the radionuclides contamination in 0-12 m soil below the two temporary repository of solid wastes associated with radioactivity can be evaluated as clean and pollution-free and heavy metals can be evaluated as clean or moderately clean (warning limit), which indicates that after 30 years of service, the temporary repository with granite and concrete mixture bottom has a good sealing effect on natural radionuclides and heavy metals in the solid waste associated with radioactivity. |
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