Combined determination of 210Pb and 210Po in soil samples around a decommissioned uranium mine
10.13491/j.issn.1004-714X.2023.06.016
- VernacularTitle:某退役铀矿山周围土壤样品中210Pb和210Po的联测结果分析
- Author:
Chunming ZHONG
1
;
Xin ZHANG
1
;
Yuqi HUANG
1
Author Information
1. Research Institute No. 230, CNNC, Changsha 410007 China;Hunan Engineering Technology Research Center for Evaluation and Comprehensive Utilization of Associated Radioactive Mineral Resources, Changsha 410007 China.
- Publication Type:OriginalArticles
- Keywords:
Decommissioned uranium mine;
Soil;
210Pb;
210Po;
Activity concentration
- From:
Chinese Journal of Radiological Health
2023;32(6):685-690
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the current situation of radioactive contamination in the soil around a decommissioned uranium mine by combined determination of 210Pb and 210Po activity concentrations. Methods Soil samples were collected around a decommissioned uranium mine. 210Po and the 210Pb decay product 210Bi were plated on a copper sheet by self-deposition at a constant temperature. Gross α and gross β counts were measured using a low-background α/β counter. The activity concentrations of 210Pb and 210Po in soil were calculated. The radioactive contamination was evaluated using geological accumulation index. Results The activity concentrations of 210Pb and 210Po in the soil around the decommissioned uranium mine were 873.7-2315.5 and 956.0-2315 Bq·kg−1, respectively. The activity concentrations of 210Pb and 210Po in nearby farmland soil were 54.2-257.8 and 59.1-234.5 Bq·kg−1, respectively. Evaluation with the geological accumulation index showed that the level of nearby farmland contamination was 0-2, indicating zero to moderate radioactive contamination of the farmland. Conclusion The relatively high radioactivity around the decommissioned uranium mine requires attention to the transfer, diffusion, and ingestion of the uranium decay products 210Pb and 210Po in the surrounding soil to avoid radioactive contamination of the environment.
