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<p>The government of Bangladesh has placed a high priority on developing the blue economy, recognizing its potential for sustainable economic growth. This promising initiative encounters a substantial challenge due to the detrimental consequences of the potentially toxic element (PTEs) contamination of the country’s coastline and marine resources. The concentration of potentially toxic elements (Cu, Fe, Mn, Pb, Cd, Cr, and Ni), pH, and organic matter content were assessed from 60 coastal sediment samples collected from twenty sites along Bangladesh’s central (Laxmipur and Noakhali) and eastern (Mirsharai, Sitakunda, and Chattogram) coasts. Among the seven elements studied, Cu, Cd, Fe, and Ni exceeded the sediment quality standards, as revealed by the pollution load index, potential ecological risk index, modified hazard quotient, and nemerow pollution index. Pollution indices indicate that Cu, Cr, Fe, and Cd were the most prevalent elements on the eastern coast, threatening the blue economy through marine ecosystem contamination. Significant positive correlations among these elements, principal components, and cluster analyses suggest similar anthropogenic sources and influences. Hazard quotient values for Cr &gt; 1, and total carcinogenic risk values for Cr, Pb, and Ni exceeded the safety limits across all population groups, indicating potential cancer risks. Probabilistic (Monte Carlo simulation) outcomes reveal children are more susceptible to cancer. Sensitivity analysis showed the fluctuation of variables contribution for three age groups in the carcinogenic and noncarcinogenic risk estimation. These findings highlight the urgent need for management strategies to mitigate potentially toxic element contamination, safeguarding public health and the blue economy.</p>

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Pollution status, distribution, and risk assessment of potentially toxic elements in sediments from Bangladesh’s fastest-growing coastal regions

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • M. Nur-E-Alam,
  • M. L. Hossain,
  • M. S. Islam,
  • M. A. Iqbal,
  • M. A. B. Siddique,
  • N. Z. Rubaia,
  • M. A. Salam

摘要

The government of Bangladesh has placed a high priority on developing the blue economy, recognizing its potential for sustainable economic growth. This promising initiative encounters a substantial challenge due to the detrimental consequences of the potentially toxic element (PTEs) contamination of the country’s coastline and marine resources. The concentration of potentially toxic elements (Cu, Fe, Mn, Pb, Cd, Cr, and Ni), pH, and organic matter content were assessed from 60 coastal sediment samples collected from twenty sites along Bangladesh’s central (Laxmipur and Noakhali) and eastern (Mirsharai, Sitakunda, and Chattogram) coasts. Among the seven elements studied, Cu, Cd, Fe, and Ni exceeded the sediment quality standards, as revealed by the pollution load index, potential ecological risk index, modified hazard quotient, and nemerow pollution index. Pollution indices indicate that Cu, Cr, Fe, and Cd were the most prevalent elements on the eastern coast, threatening the blue economy through marine ecosystem contamination. Significant positive correlations among these elements, principal components, and cluster analyses suggest similar anthropogenic sources and influences. Hazard quotient values for Cr > 1, and total carcinogenic risk values for Cr, Pb, and Ni exceeded the safety limits across all population groups, indicating potential cancer risks. Probabilistic (Monte Carlo simulation) outcomes reveal children are more susceptible to cancer. Sensitivity analysis showed the fluctuation of variables contribution for three age groups in the carcinogenic and noncarcinogenic risk estimation. These findings highlight the urgent need for management strategies to mitigate potentially toxic element contamination, safeguarding public health and the blue economy.