| Hydrogeochemical processes of thallium in a rural area of Southwest Guizhou, China |
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| 作者姓名： | 何立斌 肖唐付 李航 孙伟 |
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| 作者单位： | State Key Laboratory of Environmental Geochemistry Institute of Geochemistry，Chinese Academy of Sciences，State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China，Guiyang 550002，China，Guiyang 550002，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China，Guiyang 550002，China Graduate University of Chinese Academy of Sciences，Beijing 100049，China |
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| 基金项目： | Acknowledgements This research project is supported by the Canadian International Development Agency （Project No. CIDA/SULCP 01282/19156） and the Chinese Academy of Sciences （Project No. KZCX2-105）. |
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| 摘 要： | The water system in a rural area of Lanmuchang in Southwest Guizhou is facing a risk of thallium (Tl) contamination due to Tl mineralization around the area. The major trace elements and Tl in the water system are studied to understand the hydrogeochemical processes of Tl constrained by Tl mineralization. The results showed that the dispersion pattern of Tl follows a descending order in concentration from mine groundwater (deep groundwater) →stream water→shallow groundwater→background water, reflecting the impact of Tl mineralization on the hydrogeochemical composition. Tl concentrations in stream water in both regimes are remarkably higher (2-30 fold) downstream than up- and mid-streams, probably caused by the unidentified discharge of deep groundwater. Low Tl levels are detected in the current drinking water, however, the highly elevated Tl in stream water and ground water may pose a potential environmental risk through daily washing and agricultural irrigation. This study suggests that human activities, such as agricultural irrigation, could intensify the environmental risk of Tl.
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| 关 键 词： | 贵州东南部 农村地区 铊 水文地球化学过程 环境影响 |
| 收稿时间： | 2005-10-10 |
| 修稿时间： | 2005-12-08 |
Hydrogeochemical processes of thallium in a rural area of Southwest Guizhou,China |
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| He?Libin,Xiao?Tangfu,Li?Hang,Sun?Wei.Hydrogeochemical processes of thallium in a rural area of Southwest Guizhou, China[J].Chinese Journal of Geochemistry,2007,26(1):52-57. |
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| Authors: | He Libin Xiao Tangfu Li Hang Sun Wei |
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| Institution: | (1) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China |
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| Abstract: | The water system in a rural area of Lanmuchang in Southwest Guizhou is facing a risk of thallium (Tl) contamination due to
Tl mineralization around the area. The major trace elements and Tl in the water system are studied to understand the hydrogeochemical
processes of Tl constrained by Tl mineralization. The results showed that the dispersion pattern of Tl follows a descending
order in concentration from mine groundwater (deep groundwater) → stream water → shallow groundwater → background water, reflecting
the impact of Tl mineralization on the hydrogeochemical composition. Tl concentrations in stream water in both regimes are
remarkably higher (2–30 fold) downstream than up-and mid-streams, probably caused by the unidentified discharge of deep groundwater.
Low Tl levels are detected in the current drinking water, however, the highly elevated Tl in stream water and ground water
may pose a potential environmental risk through daily washing and agricultural irrigation. This study suggests that human
activities, such as agricultural irrigation, could intensify the environmental risk of Tl. |
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| Keywords: | thallium hydrogeochemical process environmental impact |
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