International Journal For Multidisciplinary Research

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Source Apportionment and Ecological Risk Assessment of Heavy Metals in Urban Dumpsite Soils

Author(s) Ms. Israt Jahan Ruva, Mr. Md Mehedi Hassan Masum, Mr. Md Jahedul Alam, Ms. Anika Tahsin
Country Bangladesh
Abstract Heavy metal contamination in solid waste dumpsites represents a significant environmental concern due to its persistence and potential ecological risks. This study assessed the concentrations, distribution patterns, and associated risks of selected heavy metals, together with key physicochemical properties, in soils from two major dumpsites (Arefin Nagar and Ananda Bazar) within Chittagong City Corporation, Bangladesh. A total of ten soil samples (five from each site) were collected at depths of 3–7 m and analyzed for Pb, Zn, Cd, Cu, Cr, and Ni using nitric acid digestion followed by atomic absorption spectrometry. The mean concentrations (mg kg⁻¹) in Ananda Bazar were 74.04 (Pb), 146.96 (Zn), 1.22 (Cd), 51.24 (Cu), 130.32 (Cr), and 51.76 (Ni), while Arefin Nagar recorded 44.16 (Pb), 97.42 (Zn), 1.54 (Cd), 172.98 (Cu), 26.28 (Cr), and 18.48 (Ni). The order of metal abundance was Cr > Zn > Ni > Pb > Cu > Cd in Ananda Bazar and Cu > Zn > Pb > Cr > Ni > Cd in Arefin Nagar. Contamination was evaluated using the geo-accumulation index (Igeo), degree of contamination (Cd), pollution index (PI), and ecological risk index (RI), which collectively indicated higher contamination levels at Ananda Bazar compared to Arefin Nagar. The results suggest that anthropogenic inputs, particularly from industrial, medical, and commercial waste disposal, are the dominant sources of contamination. Moderate to strong pollution levels were observed for Cr and Zn at Arefin Nagar and for Cu at Ananda Bazar, indicating potential ecological risks. These findings underscore the necessity for regular monitoring and appropriate remediation measures prior to the agricultural use of dumpsite soils.
Keywords Heavy metal contamination, dumpsite soils, pollution indices, ecological risk assessment
Field Engineering
Published In Volume 8, Issue 3, May-June 2026
Published On 2026-05-09
DOI https://doi.org/10.36948/ijfmr.2026.v08i03.77920
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