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<p>Air pollution is a substantial threat to both human health and plant life. While there has been plenty of study on the effects of air pollution on human health in Dhaka, the influence on plants in this urban environment has yet to be&#xa0;investigated. This study investigated the heavy metal content (Pb, Cd, Cr, Cu, Ni, Zn, Fe, and Mn) in various plant species to elucidate the effects of air pollution on vegetation. Samples of soil and corresponding plant leaves from <i>Mangifera indica</i> (Mango tree), <i>Swietenia mahagoni</i> (Mahogany tree), <i>Polyalthia longifolia</i> (Ashoka tree), <i>Ficus religiosa</i> (Fig tree), and <i>Artocarpus heterophyllus</i> (Jackfruit tree) were collected from industrial, traffic, and control location in Dhaka city. Concentrations of heavy metals in both soil and leaves were analyzed, and the geoaccumulation index, contamination factor, and transfer coefficient were calculated to assess the correlation between metal concentration and air pollution impact. At traffic locations, lead (Pb) and zinc (Zn) concentrations ranged from 2605 to 4289&#xa0;mg/kg and 35 to 1157&#xa0;mg/kg, respectively. In industrial areas, chromium (Cr) and copper (Cu) concentrations varied from 386 to 954&#xa0;mg/kg and 27 to 458&#xa0;mg/kg, surpassing World Health Organization recommended limits. Pb and Cr exhibited the highest geo-accumulation index. Traffic sites demonstrated the highest Pb transfer coefficients across plant species. This study is very significant as it provides important understandings for urban planning and environmental management, highlighting the adverse effects of pollution on plant species in Dhaka.</p> Graphical Abstract <p></p>

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Assessment of Heavy Metal Accumulation in Urban Plants and Soils: Evaluation of Impacts of Air Pollution in Dhaka, Bangladesh

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Rabiul Islam,
  • Md Safiqul Islam,
  • Shahid Uz Zaman,
  • Shatabdi Roy,
  • Samiha Nahian,
  • Md Moniruzzaman,
  • Abdus Salam

摘要

Air pollution is a substantial threat to both human health and plant life. While there has been plenty of study on the effects of air pollution on human health in Dhaka, the influence on plants in this urban environment has yet to be investigated. This study investigated the heavy metal content (Pb, Cd, Cr, Cu, Ni, Zn, Fe, and Mn) in various plant species to elucidate the effects of air pollution on vegetation. Samples of soil and corresponding plant leaves from Mangifera indica (Mango tree), Swietenia mahagoni (Mahogany tree), Polyalthia longifolia (Ashoka tree), Ficus religiosa (Fig tree), and Artocarpus heterophyllus (Jackfruit tree) were collected from industrial, traffic, and control location in Dhaka city. Concentrations of heavy metals in both soil and leaves were analyzed, and the geoaccumulation index, contamination factor, and transfer coefficient were calculated to assess the correlation between metal concentration and air pollution impact. At traffic locations, lead (Pb) and zinc (Zn) concentrations ranged from 2605 to 4289 mg/kg and 35 to 1157 mg/kg, respectively. In industrial areas, chromium (Cr) and copper (Cu) concentrations varied from 386 to 954 mg/kg and 27 to 458 mg/kg, surpassing World Health Organization recommended limits. Pb and Cr exhibited the highest geo-accumulation index. Traffic sites demonstrated the highest Pb transfer coefficients across plant species. This study is very significant as it provides important understandings for urban planning and environmental management, highlighting the adverse effects of pollution on plant species in Dhaka.

Graphical Abstract