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.

中文翻译：

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人为影响孟加拉国孟加拉盆地河流系统表层沉积物中的重金属含量。

摘要

恒河表面沉积物中的重金属（Sc，Cr，Co，Ni，Cu，Ga，Ge，Nb，Mo，Cd，In，Hf，Ta，W，Tl，Pb，Bi，Th和U）对孟加拉盆地（BB）的Brahmaputra-Meghna（GBM）河系进行了测量，以评估重金属污染和人为影响。大多数重金属（Mo和Tl除外）的平均浓度水平都高于地壳和页岩的平均含量。污染指数，包括污染因子，污染负荷指数，富集因子和地质积累指数，以及多变量统计分析表明，GBM受到重金属的轻微污染，其中Bi，Th，Ta，Cd，Nb， Pb，In和U。在这四个河流中，