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Distribution, contamination and accumulation of heavy metals in water, sediments, and freshwater shellfish from Liuyang River, Southern China

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Abstract

Heavy metal distributions in water, sediments, and freshwater shellfish collected from Liuyang River in China have been investigated. The concentrations of heavy metals including Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb were determined by ICP-MS. The distribution pattern of heavy metals in sediments was different from that in water. Large coefficients of variation of heavy metal concentrations were observed in water due to the susceptibility to discharge fluctuation and seasonal variation. Multivariate statistical analysis such as Pearson’s correlation analysis, hierarchical cluster analysis (HCA), and principal component analysis (PCA) were employed to identify the possible sources of heavy metals in sediments. These heavy metals were categorized into three distinct groups, one was derived from natural existence and two were associated with anthropogenic activities. Five shellfish species including three species of gastropod mollusks (Parafossarulus eximius, Semisulcospira cancellata, and Pomacea canaliculata) and two species of bivalve mollusks (Corbicula fluminea and Anodonta woodiana) were collected and investigated. The distribution pattern of heavy metals in shellfish species was visualized by the nonmetric multidimensional scaling (NMDS) plot. The metal pollution index (MPI) values for the shellfish species were in the descending order of C. fluminea > A. woodiana > S. cancellata > P. eximius > P. canaliculata.

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Funding

This work was financially supported by Special Fund for Agro-scientific Research in the Public Interest of China (No. 201503108), the Natural Science Foundation of China (Grant No. 21607175) and the Hunan Provincial Science and Technology Plan Project, China (No. 2016TP1007).

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Correspondence to Lin Wang or Zhaoguang Yang.

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Responsible editor: Philippe Garrigues

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Jia, Y., Wang, L., Qu, Z. et al. Distribution, contamination and accumulation of heavy metals in water, sediments, and freshwater shellfish from Liuyang River, Southern China. Environ Sci Pollut Res 25, 7012–7020 (2018). https://doi.org/10.1007/s11356-017-1068-x

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  • DOI: https://doi.org/10.1007/s11356-017-1068-x

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