孟加拉孟加拉湾北部沿海湿地拆船产生的金属污染：风险与来源评估

IF 4.9 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Marine pollution bulletin Pub Date : 2025-07-01 DOI:10.1016/j.marpolbul.2025.118355

Zobaer Masum , Md. Yeamim Aftad , Md Anisuzzaman , Mohammad Belal Hossain , Tasrina R. Choudhury , M. Safiur Rahman

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引用次数: 0

摘要

潜在有毒元素（pte）污染威胁着支持生物多样性和生态服务的沿海湿地。对Sitakunda海岸湿地沉积物样本进行ICP-OES分析，评估PTE污染及其生态风险。沉积物样品平均PTE浓度由高到低依次为：Cr(58.96±6.86 mg/kg) >；镍（46.74±5.09 mg/kg）；铜（41.1±11.40 mg/kg） >；铅（13.37±5.09 mg/kg） >；As(8.68±1.37 mg/kg) >；汞柱（0.37±0.042 mg/kg） >；Cd(0.32±0.04 mg/kg)，超过沉积物阈值影响水平。湿地中大部分金属的PTE浓度为红树林；盐泽比;泥滩祝辞sandflat。各湿地的污染负荷指数（PLI）均小于1，为无污染，其大小顺序为：红树林>；盐沼>；泥滩祝辞砂坪。镉的污染系数（CF）较高，其他湿地金属的污染系数均较低。Geoaccumulation Index （Igeo）发现所有湿地的污染都可以忽略不计(Igeo <；0)。汞在所有湿地的EF值均为<；1，表明是自然来源。As、Cd、Cr、Cu、Ni、Pb的EF值均为1，提示人为来源。除Hg和Cd表现为中度生态风险外，其他金属均表现为低生态风险。相关矩阵、聚类分析和主成分分析显示相关性显著(p <；0.05)，金属和列出的人为来源之间。我们建议在沿海地区种植人工红树林，以捕获和稳定PTE污染，这是一种自然而有效的补救措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Shipbreaking-derived metal contamination in coastal wetlands: Risk and source assessment in northern Bay of Bengal, Bangladesh

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Shipbreaking-derived metal contamination in coastal wetlands: Risk and source assessment in northern Bay of Bengal, Bangladesh

Pollution from potentially toxic elements (PTEs) threatens coastal wetlands, which support biodiversity and ecological services. The ICP-OES analysis of sediment samples from coastal wetlands on the Sitakunda coast assessed PTE contamination and ecological risks. The sediment sample mean PTE concentrations were ordered in decreasing order: Cr (58.96 ± 6.86 mg/kg) > Ni (46.74 ± 5.09 mg/kg) > Cu (41.1 ± 11.40 mg/kg) > Pb (13.37 ± 5.09 mg/kg) > As (8.68 ± 1.37 mg/kg) > Hg (0.37 ± 0.042 mg/kg) > Cd (0.32 ± 0.04 mg/kg), exceeding sediment threshold impact levels. PTE concentrations for most of the metals across wetlands were mangrove > saltmarsh > mudflat > sandflat. Each wetland had pollution load index (PLI) values below 1, indicating no pollution, and was in the following order: mangrove > salt marsh > mudflat > sand flat. Cd exhibited substantial contamination factor (CF) values, while all other wetland metals were low. Geoaccumulation Index (I_geo) found negligible contamination in all wetlands (I_geo < 0). Hg had EF values <1 across all wetlands, indicating natural sources. As, Cd, Cr, Cu, Ni, and Pb EF values >1 in all wetland types, indicating anthropogenic sources. All metals across studied wetlands showed low ecosystem risk except Hg and Cd, which exhibited moderate ecological risks. A correlation matrix, cluster analysis, and principal component analysis showed substantial correlations (p < 0.05) between metals and listed anthropogenic sources. We recommend planting artificial mangroves in coastal areas to trap and stabilize PTE pollution, a natural and effective remedy.

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来源期刊

Marine pollution bulletin 环境科学-海洋与淡水生物学

CiteScore

10.20

自引率

15.50%

发文量

1077

审稿时长

68 days

期刊介绍： Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.