Hydrogeochemical processes of thallium in a rural area of Southwest Guizhou, China
Hydrogeochemical processes of thallium in a rural area of Southwest Guizhou, China
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DOI：
10.1007/s11631-007-0052-4
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Libin He;T. Xiao;Hang Li;Wei Sun
中科院分区：
文献类型：
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作者：
Libin He;T. Xiao;Hang Li;Wei Sun
黔西南烂木厂农村地区由于铊矿化，面临着铊污染的风险。通过对水系中主要微量元素和铊的研究，探讨了铊成矿作用对水体中铊水文地球化学过程的制约作用。结果表明，铊的分散规律为：矿区地下水（深层水）→河流水→浅层水→背景水，反映了铊矿化对水文地球化学组成的影响。在这两个制度的河水中铊浓度显着较高（2-30倍）下游比上游和中游，可能是由于不明排放的深层地下水。目前的饮用水中检测到的铊水平较低，然而，河水和地下水中的铊高度升高可能会通过日常洗涤和农业灌溉造成潜在的环境风险。这项研究表明，人类活动，如农业灌溉，可能会加剧铊的环境风险。
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.