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- Title
某铀水冶厂周边土壤放射性核素U 和Th 分布特征及 污染评价.
- Authors
钟可意; 王笠成; 邵波霖; 朱殿梅; 胡雨婷; 程馨
- Abstract
To explore the distribution characteristics and the pollution status of thorium (Th) and uranium (U) in the soil around a uranium hydrometallurgy plant, we analyzed the contents, speciation of Th and U, and 235 U/238 U ratios in the soil samples. The geo-accumulation index and risk assessment coding method were used to evaluate the ecological pollution risk. The results showed that the average contents of Th and U were 14.56 mg·kg-1 and 2. 96 mg·kg-1, respectively, which were 1.28 and 1.23 times of the local soil background values, respectively. However, the residual fractions of Th and U were 98.12%, and 86.32% respectively, accounting for the most abundant speciation in the soil. The average value of 235 U/238 U ratios in soil samples was 0.00733, which was higher than the soil background value of 0.00725, indicating the impact of industrial activities. The soil samples in the southeast of the study area showed obviously higher U content, active U proportion and 235 U/238 U ratio, further confirmed the impact of industrial activities. The risk assessment results showed a low pollution risk of uranium in the soil, the concentration and speciation of U should be considered in long-term monitoring.
- Subjects
SOIL sampling; CHEMICAL speciation; THORIUM; HYDROMETALLURGY; RISK assessment; URANIUM; ENVIRONMENTAL geology
- Publication
Asian Journals of Ecotoxicology, 2022, Vol 17, Issue 4, p279
- ISSN
1673-5897
- Publication type
Article
- DOI
10.7524/AJE.1673-5897.20210912001