Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/3190
Title: Distribution, Concentration, and Ecological Risk Assessment of Trace Metals in Surface Sediment of a Tropical Bangladeshi Urban River
Authors: Nur-E-alam, Md. 
Salam, Mohammed Abdus 
Dewanjee, Sanchita 
Hasan, Md. Foysal 
Rahman, Hafizur 
Aweng Eh Rak 
Islam, Abu Reza Md. Towfiqul 
Miah, Md. Yunus 
Keywords: Karnaphuli River;Risk assessment;Source identification;Surface sediment;Trace metals
Issue Date: May-2022
Publisher: MDPI
Journal: Sustainability (Switzerland) 
Abstract: 
Trace metal contamination in sediments is a global concern. This study aimed to assess the contamination level of trace metals, their sources, and ecological risk in surface sediments of Karnaphuli River—a tropical urban river in Bangladesh. Forty-five sediment samples were analyzed by atomic absorption spectrophotometry (AAS) for Cu, Fe, Zn, Pb, Cr, Cd, and Ni metals along with physicochemical parameters like pH and organic matter (OM). The pollution status and potential ecological risk were assessed by using the geo-accumulation index (Igeo ), contamination factor (CF), and potential ecological risk index (PERI). Source identification of trace metals was performed by correlation analysis, cluster analysis, and principal component analysis (PCA). The results show that the range of Cu, Fe, Zn, Pb, Cr, Cd, and Ni concentrations were 0.62–1.61 mg/kg, 23.95–85.70%, 0.52–1.89 mg/kg, 7.99–12.90 mg/kg, 33.91–65.47 mg/kg, 0.77–1.17 mg/kg, and 2.73–5.36 mg/kg, respectively. The concentrations of Fe, Cd, and Cr were above the permissible limits while the contamination factor (CF) and geo-accumulation index (Igeo ) values revealed that Fe and Cd were the most dominant pollutants. Cluster analysis and PERI exhibited significant anthropogenic intrusions of trace metals. A significant positive correlation between Fe-Cr, Cr-Ni, Fe-Ni, and Pb-Cd shows their common anthropogenic source and influences. PERI also revealed that Cr, Fe, and Cd have a significant contribution with a moderate to considerable potential threat.
Description: 
Web of Science / Scopus
URI: http://hdl.handle.net/123456789/3190
ISSN: 20711050
DOI: 10.3390/su14095033
Appears in Collections:Faculty of Earth Science - Journal (Scopus/WOS)

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