The distribution of radioactive pollutants, such as222Rn, U, Th and226Ra in the air, surface waters, soils and crops around the Lincang uranium mine, Yunnan Province, China, is studied. The mechanical, geochemical and biogeochemical processes responsible for the transport and fate of the radioactive elements are discussed based on the monitoring data. The pollutants concentrations of effluents from the mine tunnels were dependent on pH and which were controlled by biochemical oxidation of sulfide in the ore/host rocks. Radon anomalies in air reached 4 km from the tailings pile depending on radon release from the site, topography and climate.238U and226Ra abnormities in stream sediments and soil were 40—90 cm deep and 790—800 m away downstream. Anomalies of radioactive contaminants of surface watercourses extended 7.5—13 km from the discharge of effluents of the site mainly depending on mechanical and chemical processes. There were about 2.86 ha rice fields and 1.59 km stream sediments contaminated. Erosion of tailings and mining debris with little or no containment or control accelerated the contamination processes.
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Department of Environmental Engineering, China University of Geosciences, 430074, Wuhan, China
Xu Lechang, Wang Yanxin & Liu Xiaoyang
Research Institute of Uranium Mining, China National Nuclear Corporation, P.O. Box 48, 421001, Hengyang, China
Xu Lechang, LÜ Junwen & Liu Yaochi
Research Center of Environmental Science and Technology, Zhuzhou Institute of Technology, 412008, Zhuzhou, China
Lu Xueshi
Correspondence to Xu Lechang.
About this article Cite this articleXu, L., Wang, Y., LÜ, J. et al. Radioactive contamination of the environment as a result of uranium production: a case study at the abandoned Lincang uranium mine, Yunnan Province, China. Sc. China Ser. B-Chem. 45 (Suppl 1), 11–19 (2002). https://doi.org/10.1007/BF02932202
Received: 20 June 2002
Issue Date: December 2002
DOI: https://doi.org/10.1007/BF02932202
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