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:: Volume 7, Issue 2 (2-2020) ::
jehe 2020, 7(2): 179-194 Back to browse issues page
Heavy Metal Pollution in Street Dust from Tehran in 2018: Metal Richness and Degree of Contamination Assessment
Mohammad Saleh Ali-Taleshi, Mazaher Moeinaddini , Sadat Feiznia, Stefania Squizzato
Assistant Professor, Department of Environment, Faculty of Natural Resources, University of Tehran, Karaj, Iran
Abstract:   (457 Views)
Background: Street dust is an environmental medium with complex composition in urban environment. Heavy metals remain in urban dust for a long time and re-suspended in the atmosphere. This study aimed to evaluate the metal richness and degree of contamination in Tehran street dust. 
Methods: Dust samples were collected from nine locations in Tehran in 2018. Heavy metals (Cd, Cr, Pb, Zn, Fe, and Al) were analyzed in street dust using ICP-MS. Metal richness and degree of contamination were determined using Enrichment Factor (EF), Geoaccumulation Index (Igeo), degree of Contamination (Cd) and modified degree of contamination (mCd). Pearson correlation (PC) and Hierarchical cluster analysis (HCA) were also used for analysis.
Results: The mean concentration trend of elements was as Al (53486.54)> Fe (46535.07)> Zn (638.14)> Pb (200.33)> Cr (111.94), Cd (0.49) mg/kg. The highest metal enrichment was due to Pb and Zn. The geoaccumulation index also showed that Cd and Pb had the highest values. Degree of contamination indices also showed high levels of contamination in street dust. Significant correlation was observed between Zn-Cr-Pb and Pb-Cd. Significant negative correlation was also observed between relative humidity-Pb-Zn. Elemental clustering also showed that Pb, Zn, Cr, and Cd had anthropogenic sources and Fe and Al had natural sources of diffusion.    
Conclusion: The results of this study showed that the street dust of Tehran is highly polluted. Therefore, this environmental medium can have significant negative effects. Therefore, continuous monitoring of street dust is essential.
Keywords: Street dust, Heavy metal, Metal richness, Degree of contamination, Tehran
Full-Text [PDF 1120 kb]   (128 Downloads)    
Type of Study: Research | Subject: Special
Received: 2020/04/28 | Accepted: 2020/04/28 | Published: 2020/04/28
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Ali-Taleshi M S, Moeinaddini M, Feiznia S, Squizzato S. Heavy Metal Pollution in Street Dust from Tehran in 2018: Metal Richness and Degree of Contamination Assessment. jehe. 2020; 7 (2) :179-194
URL: http://jehe.abzums.ac.ir/article-1-741-en.html


Volume 7, Issue 2 (2-2020) Back to browse issues page
مجله مهندسی بهداشت محیط Journal of Environmental Health Enginering
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