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| Radioactive contamination of the environment as a result of uranium production: a case study at the abandoned Lincang uranium mine, Yunnan Province, China | |
| 作者姓名： | 徐乐昌 王焰新 吕俊文 卢学实 刘耀驰 刘晓阳 |
| 作者单位： | Department of Environmental Engineering China University of Geosciences. Wuhan 430074 China Research Institute of Uranium Mining China National Nuclear Corporation P.O. Box 48 Hengyang 421001 China，Department of Environmental Engineering China University of Geosciences Wuhan 430074 China，Research Institute of Uranium Mining China National Nuclear Corporation P.O. Box 48. Hengyang 421001 China，Research Center of Environmental Science and Technology Zhuzhou Institute of Technology Zhuzhou 412008 China，Research Institute of Uranium Mining China National Nuclear Corporation P.O. Box 48. Hengyang 421001 China，Department of Environmental Engineering China University of Geosciences Wuhan 430074 China |
| 基金项目： | 国家自然科学基金，高等学校优秀青年教师教学科研奖励计划 |
| 摘 要： | The distribution of radioactive pollutants, such as ~(222)Rn, U, Th and ~(226)Ra in the air, sur-face waters, soils and crops around the Lincang uranium mine, Yunnan Province, China, is studiedThe mechanical, geochemical and biogeochemical processes responsible for the transport andfate of the radioactive elements are discussed based on the monitoring data. The pollutants con-centrations of effluents from the mine tunnels were dependent on pH and SO_4~(2-) which were con-trolled by biochemical oxidation of sulfide in the ore/host rocks. Radon anomalies in air reached 4km from the tailings pile depending on radon release from the site, topography and climate. ~(238)Uand ~(226)Ra abnormities in stream sediments and soil were 40-90 cm deep and 790-800 m awaydownstream. Anomalies of radioactive contaminants of surface watercourses extended 7.5-13km from the discharge of effluents of the site mainly depending on mechanical and chemical proc-esses. There were about 2.86 ha rice fields and 1.59 km stream sediments contaminated. Erosionof tailings and mining debris with little or no containment or control accelerated the contaminationprocesses. |
Radioactive contamination of the environment as a result of uranium production: a case study at the abandoned Lincang uranium mine, Yunnan Province, China |
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| XU Lechang.Radioactive contamination of the environment as a result of uranium production: a case study at the abandoned Lincang uranium mine, Yunnan Province, China[J].Science in China(Chemistry),2002,45(Z1). | |
| Authors: | XU Lechang |
| Institution: | 1. Department of Environmental Engineering, China University of Geosciences, Wuhan 430074, China;Research Institute of Uranium Mining, China National Nuclear Corporation, P.O. Box 48, Hengyang 421001, China 2. Department of Environmental Engineering, China University of Geosciences, Wuhan 430074, China 3. Research Institute of Uranium Mining, China National Nuclear Corporation, P.O. Box 48, Hengyang 421001, China 4. Research Center of Environmental Science and Technology, Zhuzhou Institute of Technology, Zhuzhou 412008, China |
| Abstract: | The distribution of radioactive pollutants, such as ~(222)Rn, U, Th and ~(226)Ra in the air, sur- face 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 con- centrations of effluents from the mine tunnels were dependent on pH and SO_4~(2-) which were con- trolled 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. ~(238)U and ~(226)Ra 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 proc- esses. 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. |
| Keywords: | radioactive contamination uranium production air surface water soil crop |
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