Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines), 826 004, Dhanbad, India.
Environ Monit Assess. 2020 Oct 12;192(11):699. doi: 10.1007/s10661-020-08643-1.
The present study was intended to determine the potentially toxic elements (PTEs) concentration in fly ash (FA), soil, plant, and vegetable to assess the impacts of pollution on the nearby areas of coal-fired thermal power plant (TPP). The PTEs concentrations (mg/kg) in FA were Cr (48-74) > Pb (41-65) > Cd (7.4-9.7) > As (3.19-4.43) > Hg (0.518-0.598). The contamination factor (C) for Cd was highest in agricultural soil (C = 22) followed by roadside soil (C = 20), and forest soil (C = 15), which showed that the soil was strongly polluted due to the presence of Cd. The ecological risk index (ERI) in the topsoil of roadside area was also very high (1130), due to the high value of ecological risk factor of Cd (898) and Hg (213). The health risk associated with the intake of soil containing PTEs were also estimated by calculating hazard index (HI), and the values showed that the risk posed to children was minimum (HI < 1). But in case of roadside area, the HI was very close to one (0.975) indicating that the prolong exposure may pose severe health risk. The bioaccumulation coefficient of all PTEs for Albizia lebbeck and Madhuca longifolia were < 1, indicating less PTEs accumulation in the plant species. The hazard quotient of all PTEs (except of Hg) through vegetable consumption (Allium cepa and Raphanus sativus) was > 1, which signifies that the long-time consumption of contaminated vegetables may cause severe risk to the people.
本研究旨在测定粉煤灰（FA）、土壤、植物和蔬菜中潜在有毒元素（PTEs）的浓度，以评估燃煤热电厂（TPP）附近地区的污染影响。FA 中的 PTEs 浓度（mg/kg）为 Cr（48-74）>Pb（41-65）>Cd（7.4-9.7）>As（3.19-4.43）>Hg（0.518-0.598）。农业土壤中 Cd 的污染因子（C）最高（C=22），其次是路边土壤（C=20）和森林土壤（C=15），这表明土壤受到 Cd 的强烈污染。路边土壤的生态风险指数（ERI）也很高（1130），这是由于 Cd（898）和 Hg（213）的生态风险因子值较高。通过计算危害指数（HI），还评估了摄入含 PTEs 土壤对健康的相关风险，结果表明儿童受到的风险最小（HI<1）。但在路边地区，HI 非常接近 1（0.975），表明长时间暴露可能会造成严重的健康风险。Albizia lebbeck 和 Madhuca longifolia 对所有 PTEs 的生物积累系数均<1，表明植物物种对 PTEs 的积累较少。食用蔬菜（Allium cepa 和 Raphanus sativus）对所有 PTEs（除 Hg 外）的危害系数均>1，这表明长期食用受污染的蔬菜可能会对人体造成严重的风险。
