Distribution and potential ecological risk assessment of trace elements in the stream water and sediments from Lanmuchang area, southwest Guizhou, China
Distribution and potential ecological risk assessment of trace elements in the stream water and sediments from Lanmuchang area, southwest Guizhou, China
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黔西南榄木场地区溪流水体和沉积物中微量元素分布及潜在生态风险评价
DOI：
10.1007/s11356-018-3827-8
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发表时间：
2018-12
影响因子：
5.8
通讯作者：
Xiao Tangfu
中科院分区：
文献类型：
--
作者：
Rasool Atta;Xiao Tangfu
沉积物中的微量元素污染被认为是全球性的危机，在中国这样的发展中国家占有很大的份额。2016年在清水溪采集了水样和沉积物样品，利用ICP-MS分析了主要理化性质和微量元素。沉积物的结果表明，所研究的微量元素除Pb、Cd、Co外，其他微量元素的含量均高于中国沉积物基准值和河流水体数据（除Cr、Pb、Cd、Cu和Zn外）均高于WHO的最大允许安全限量。污染因子（CF）证实了中度至高度污染的沉积物样品，由于作为和铊，分别。污染负荷指数（PLI）均大于1（> 1），说明沉积物质量呈逐渐下降趋势。Pearson相关分析表明，沉积物中铊与砷呈显著正相关（r= 0.725，p < 0.05）。结果表明，水-岩相互作用，风化的铊硫化物矿化，和水文地质条件的河流水和沉积物污染的主要来源在研究区。该实验研究有助于更好地了解滥木厂地区沉积物中微量元素的地球化学特征和污染防治。
Trace elements contamination in sediment is regarded as the global crisis with a large share in developing countries like China. Water and sediment samples were collected during (2016) from Qingshui Stream and analyzed for major physicochemical properties and trace elements by using ICP-MS. Our result of sediments showed that studied trace elements (except Pb, Cd, Co) had a concentration higher than Chinese sediment guideline as well as stream water data for studied trace elements (except Cr, Pb, Cd, Cu, and Zn) had a higher concentration than the maximum permissible safe limit of WHO. Contamination factor (CF) confirmed a moderate to high contamination in the sediment samples due to As and Tl, respectively. The values of pollution load index (PLI) were found above one (> 1), describing the progressive sediment quality decline. Pearson correlation showed that there was a significant positive association between Tl and As (r= 0.725,p< 0.05) in sediment samples. Results revealed that water-rock interaction, weathering of Tl sulfide mineralization, and hydrogeological conditions were major sources of stream water and sediments contamination in the study area. This experimental study contributes to a better understanding of the geochemistry and prevention of trace element contamination in sediments from Lanmuchang area.
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