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Heavy metals and polycyclic aromatic hydrocarbons: Pollution and ecological risk assessment in street dust of Tehran


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50 street dust samples from four major streets in eastern and southern Tehran, the capital of Iran, were analyzed for metal pollution (Cu, Cr, Pb, Ni, Cd, Zn, Fe, Mn and Li). Hakanson's method was used to determine the Risk Index (RI) and ecological risks. Amongst these samples, 21 were also analyzed for polycyclic aromatic hydrocarbons (PAHs). Correlation, cluster and principal component analyses identified probable natural and anthropogenic sources of contaminants. The dust had elevated concentrations of Pb, Cd, Cu, Cr, Ni, Zn, Fe and PAHs. Enrichment factors of Cu, Pb, Cd and Zn showed that the dust is extremely enriched in these metals. Multivariate statistical analyses revealed that Cu, Pb, Zn, Fe and PAHs and, to a lesser extent, Cr and Ni have common anthropogenic sources. While Mn and Li were identified to have natural sources, Cd may have different anthropogenic origins. All samples demonstrated high ecological risk. Traffic and related activities, petrogenic and pyrogenic sources are likely to be the main anthropogenic sources of heavy metals and PAHs in Tehran dust.

Item Type: Journal article
Additional Information: Regardless of being the third author, I am the main contributor of this paper as it shows the results of my master research. My master supervisor (Saeedi, M) didn't let me to put my name as the first author. However, I've got a letter from him confirming my main contribution and happy to provide that letter.
Uncontrolled Keywords: Street dust, Heavy metal, PAH, Ecological risk, Multivariate analysis
Subjects: Q Science > Q Science (General)
Divisions: Schools > Centre for Science and Primary Industries
Depositing User: Maddie Zadeh
Date Deposited: 18 Jan 2018 04:00
Last Modified: 21 Jul 2023 04:49

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