Assessment of heavy metal pollution in Red River surface sediments, Vietnam.
Assessment of heavy metal pollution in Red River surface sediments, Vietnam.
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DOI：
10.1016/j.marpolbul.2016.08.030
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发表时间：
2016-12
影响因子：
5.8
通讯作者：
T. Nguyen;Weiguo Zhang;Zhen Li;Jie Li;Can Ge;Jinyan Liu;Xuexin Bai;H. Feng;Lizhong Yu
中科院分区：
文献类型：
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作者：
T. Nguyen;Weiguo Zhang;Zhen Li;Jie Li;Can Ge;Jinyan Liu;Xuexin Bai;H. Feng;Lizhong Yu
从越南红河上游到水下三角洲收集了表面沉积物样本，以评估重金属污染。沉积物中 Cr 和 V 的浓度与 Al、Fe、Mn 和总有机碳浓度以及颗粒大小密切相关，表明这两种金属主要来自天然来源，并富集在沉积物的细小部分中。相比之下，Cu、Cd、Pb、Ni 和 Zn 浓度与颗粒尺寸的相关性较弱，在河流上游的几个地点观察到浓度非常高，表明人为输入可能是这些重金属的来源。 Cu、Cd、Pb、Ni、Zn的富集因子（EF）表明上游沉积物中存在重金属污染，且值显着较高。数据分析表明，红河主要污染物为镉、铜、铅，其浓度达到中度至重度污染水平。
Surface sediment samples were collected from upstream down to the subaqueous delta of the Red River in Vietnam to assess heavy metal pollution. Sediment Cr and V concentrations are strongly correlated with Al, Fe, Mn and total organic carbon concentrations, as well as particle size, suggesting that these two metals are derived primarily from natural sources and enriched in the fine fraction of sediments. In contrast, Cu, Cd, Pb, Ni and Zn concentrations show weaker correlations with particle size, with very high concentrations observed at several sites in the upper reach of the river, pointing to anthropogenic input as a possible source of these heavy metals. Enrichment factors (EF) of Cu, Cd, Pb, Ni and Zn suggest that heavy metal pollution is present in sediments with significantly high values in the upstream. The data analysis indicates that Cd, Cu and Pb are the dominant pollutants in the Red River, with their concentrations reaching moderate to serious pollution levels.