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Anthropogenic effect on heavy metal contents in surface sediments of the Bengal Basin river system, Bangladesh

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Abstract

Heavy metals (Sc, Cr, Co, Ni, Cu, Ga, Ge, Nb, Mo, Cd, In, Hf, Ta, W, Tl, Pb, Bi, Th, and U) in the surface sediments of the Ganges-Brahmaputra-Meghna (GBM) river system of the Bengal Basin (BB) were measured to evaluate the heavy metal contamination and anthropogenic influence. The average concentration levels of most of the heavy metals (except Mo and Tl) were above the average crustal and shale values. Contamination indices, including the contamination factor, pollution load index, enrichment factor, and geo-accumulation index, and multivariate statistical analyses indicated that the GBM is slightly polluted by heavy metals with some considerable pollution from Bi, Th, Ta, Cd, Nb, Pb, In, and U. Among the four individual rivers, the Brahmaputra River and Ganges-Brahmaputra (GB) confluence river sediments contain higher heavy metal concentrations than do the Ganges and Meghna Rivers, which may be caused by the effects of local municipal discharge, industrial or urban wastes, and ferry crossing activities.

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Acknowledgments

We thank our colleagues from the South China Sea Institute of Oceanology, the First Institute of Oceanography, and Jatiya Kabi Kazi Nazrul Islam University for fieldwork. We gratefully acknowledge the editor, Dr. Severine Le Faucheur, and three anonymous reviewers for their valuable comments.

Funding

This work was jointly funded by the National Program on Global Change and Air-Sea Interaction (GASI-GEOGE-03) and the Natural Science Foundation of China-Shandong Joint Fund for Marine Science Research Centers (U1606401).

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Correspondence to Jianguo Liu.

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Editorial Responsibility: Severine Le Faucheur

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Khan, M.H.R., Liu, J., Liu, S. et al. Anthropogenic effect on heavy metal contents in surface sediments of the Bengal Basin river system, Bangladesh. Environ Sci Pollut Res 27, 19688–19702 (2020). https://doi.org/10.1007/s11356-020-08470-4

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  • DOI: https://doi.org/10.1007/s11356-020-08470-4

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