Spatial Variation and Assessment of Heavy Metal and Radioactive Risk in Farmland around a Retired Uranium Mine

8th International Conference on Environmental Science and Technology

生态环境科学

Liang, Jie^1 ; Shi, Chen-Hao^1 ; Zeng, Guang-Ming^1 ; Zhong, Min-Zhou^1 ; Yuan, Yu-Jie^1

College of Environmental Science and Engineering, Hunan University, Changsha, China^1

关键词: Anthropogenic origin;    Geo-accumulation index;    Heavy metal contamination;    Mean concentrations;    Pollution load indices;    Radiation distribution;    Radioactive contamination;    Spatial variations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/78/1/012005/pdf
DOI  :  10.1088/1755-1315/78/1/012005

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In recent years, heavy metal contamination in the environment has been attracted worldwide attention due to their toxicity, persistence,extensive sources and non-biodegradable properties. We herein investigate variation trend and risk of heavy metal and radiation distribution in the former mine stope, former mineral ore stockyard, and mine road with surface soils of a retired uranium mine in the mid-south of China. The mean concentrations (mg/kg) of Pb,Cd,Cu,Zn,As,Hg,Cr,Mn,Ni,U, and232Th were analyzed according to the corresponding background values in Hunan, China. The Geo-accumulation index (Igeo) were used for the assessment of pollution level of heavy metals and the radioactive elements of U and232Th. Then, Pollution load index (PLI) and GIS techniquewere integrated to assess spatial distribution of heavy metal contamination and radioactive contamination. Results confirmed that three areas in the retired uranium mine was a primary source of pollution, which showed anthropogenic origin mainly from agricultural runoff, hydrometallurgy from chemical industries, radioactive tailings, and electroplating industriesfinally drained into Zishui River and Xiangjiang River. Based on the actual situation, some suggestions were put forward for the treatment of the retired uranium mine in conclusion.