Spatial distribution and ecological risk of heavy metal in surface sediment of Old Brahmaputra River, Bangladesh

IF 1.3 4区环境科学与生态学 Q3 ECOLOGY

Chemistry and Ecology Pub Date : 2022-12-05 DOI:10.1080/02757540.2022.2152015

M. Islam, Rifat Shahid Shammi, Rahiatul Jannat, M. Kabir, M. Islam

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引用次数: 4

Abstract

ABSTRACT The study was conducted to investigate the concentrations, distributions, sources, and potential ecological risk of heavy metals in surface sediments from the Old Brahmaputra River. Sediment samples were collected from five sampling stations and analyzed with an inductively coupled plasma mass spectrometer (ICP-MS). The results showed that mean concentrations (mg/kg) of heavy metals were in order of Ni (58.82) > Cr (32.45) > Pb (21.04) > Cu (14.24) > Cd (3.81) > As (2.02). Element-specific environmental indices exposed that the ecological risks trailed in the same downward direction as Cd > Ni > Pb > As > Cu > Cr. The contamination factor (CF), enrichment factor (EF), and geo-accumulation index (Igeo) exposed all cases to a modest level of contamination except for Cd, which has a significant level of contamination. Only Ni and Cd were found to pose a high ecological risk for aquatic life based on the sediment quality guidelines. The prospective ecological risk factor and potential ecological risk both suggested low to moderate ecological risk. The river sediments were mostly uncontaminated or mildly contaminated, posing a minimal ecological risk. The study concluded that the Old Brahmaputra River is subjected to anthropogenic disturbances in its aquatic environment.

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孟加拉国老布拉马普特拉河表层沉积物重金属的空间分布和生态风险

摘要:本研究旨在研究老雅鲁藏布江表层沉积物中重金属的浓度、分布、来源及潜在生态风险。采用电感耦合等离子体质谱仪(ICP-MS)对5个采样站的沉积物样品进行分析。结果表明，重金属平均浓度(mg/kg)依次为Ni (58.82) > Cr (32.45) > Pb (21.04) > Cu (14.24) > Cd (3.81) > As(2.02)。元素特异性环境指数显示，生态风险与Cd > Ni > Pb > as > Cu > Cr呈相同的下降趋势。污染因子(CF)、富集因子(EF)和地质积累指数(Igeo)显示，除Cd具有显著污染水平外，所有案例都处于中等污染水平。根据沉积物质量指南，仅发现Ni和Cd对水生生物构成高生态风险。预期生态风险因子和潜在生态风险因子均为低至中等生态风险。河流沉积物大部分未受污染或轻度污染，生态风险极小。该研究得出结论，旧雅鲁藏布江的水环境受到人为干扰。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemistry and Ecology 环境科学-环境科学

CiteScore

4.20

自引率

16.00%

发文量

审稿时长

3.7 months

期刊介绍： Chemistry and Ecology publishes original articles, short notes and occasional reviews on the relationship between chemistry and ecological processes. This journal reflects how chemical form and state, as well as other basic properties, are critical in their influence on biological systems and that understanding of the routes and dynamics of the transfer of materials through atmospheric, terrestrial and aquatic systems, and the associated effects, calls for an integrated treatment. Chemistry and Ecology will help promote the ecological assessment of a changing chemical environment and in the development of a better understanding of ecological functions.