Heavy Metal Pollution and Ecological Risk Assessment of the Soil and Grass from Major Riverside Areas in Megacity Dhaka, Bangladesh | ||
| Pollution | ||
| دوره 12، شماره 3، پاییز 2026، صفحه 751-768 اصل مقاله (795.29 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/poll.2026.398978.3034 | ||
| نویسندگان | ||
| Anik Roy1؛ Md. Sabbir Hossain2؛ Protima Sarker3؛ Xin Liu4؛ Fee Faysal Ahmed5؛ Molla Rahman Shaibur2؛ M. Khabir Uddin* 1 | ||
| 1Department of Environmental Sciences, Jahangirnagar University, Dhaka-1342, Bangladesh | ||
| 2Department of Environmental Science and Technology, Jashore University of Science and Technology, P. O. Box 7408, Jashore, Bangladesh | ||
| 3Department of Environmental Science and Disaster Management, Noakhali Science and Technology University, Noakhali-3814, Bangladesh | ||
| 4Guangxi Key Laboratory of Aquatic Biotechnology and Modern Ecological Aquaculture, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, Guangxi 530007, China | ||
| 5Department of Mathematics, Jashore University of Science and Technology, P. O. Box 7408, Jashore, Bangladesh | ||
| چکیده | ||
| Heavy metal (HM) contamination in soil and plants endangers living organisms due to its toxic, persistent, and bioaccumulative nature. In this study, soil and grass samples were collected from the Buriganga, Turag, and Bongshi riverside areas of megacity Dhaka, Bangladesh. In this investigation, pollution levels, ecological risk, and HM transfer from soil to grass were assessed using the geo-accumulation index, contamination factor, ecological risk index, and correlation analysis. HM concentrations in both soil and grass were found in descending order of Lead (Pb) > Chromium (Cr) > Nickel (Ni) > Copper (Cu) > Cadmium (Cd). The highest concentrations of Pb were 73.45 ± 15.76 mg/kg and 64.23 ± 8.68 mg/kg in soil and grass, respectively. The maximum geo-accumulation index was < 1, indicating the unpolluted soil quality. The mean contamination factors of HMs were 0.85 in Cr (low contamination), 0.96 in Cu (low contamination), 3.61 in Ni (considerable contamination), 0.039 in Cd (low contamination), and 2.29 in Pb (moderate contamination). The degree of contamination was above 6, indicating moderate contamination. One site near the Bongshi River and six sites in the dairy farm area showed a pollution load index value (PLI) < 1, indicating no pollution. The other 17 areas showed PLI > 1, indicating polluted sites. Ecological risk index analysis indicates that all the sites are ecologically safe, but HM mobility from soil to grass indicates a high accumulation of HM in grass. Effective environmental management is essential to control HM pollution at its source and protect riverside ecosystems. | ||
| کلیدواژهها | ||
| Heavy metal؛ soil pollution؛ geo-accumulation index؛ pollution load index؛ ecological risk | ||
| مراجع | ||
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