Characterization andmetals fractionation of street dust samples fromTehran, Iran

Salmanzadeh, Mahdiyeh and Saeedi, Mohsen and Li, Loretta and Nabi-Bidhendi, Gholamreza (2015) Characterization andmetals fractionation of street dust samples fromTehran, Iran. International Journal of Environmental Research, 9 . pp. 213-224.

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Abstract or Summary

Fifty street dust samples were collected from Southern and Eastern parts of Tehran, the capital of Iran. Samples were collected during summer under dry and stable weather conditions. Total concentrations of copper (Cu), cadmium (Cd), lead (Pb), chromium (Cr), nickel (Ni), zinc (Zn), iron (Fe), manganese (Mn) and lithium (Li) were determined. Ten samples were then selected for characterization, metals fractionation and single stage extraction studies. X-ray diffraction (XRD) and X-ray fluorescence (XRF) were utilized to study the crystalline forms of metals and chemical compositions. In addition, sequential and single extraction procedures were used to determine the concentrations of six heavy metals (i.e. Cu, Cd, Pb, Cr, Ni and Zn), and also the mobility and bioavailability of elements. The risk assessment code (RAC) and IPOLLwere employed for the risk assessment and pollution intensity of metals, respectively. Results showed that the single extraction procedure could be used to estimate the total concentrations of most metals as an appropriate alternative for total digestion. The mobility and potential availability of metals in Tehran street dust followed the order of Cd > Zn > Pb > Cu > Ni > Cr. The risk assessment code results showed high risk for Pb, Cd and Zn and low medium risk for Ni, Cr and Cu, and correlated positively with IPOLL result.

Item Type:Journal article
Keywords that describe the item:Heavy metals, risk, Sequential extraction, Single extraction, IPOLL, dust, tehran
Subjects:Q Science > Q Science (General)
Divisions:Schools > Centre for Science and Primary Industries
ID Code:5654
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Deposited On:18 Jan 2018 04:22
Last Modified:02 Feb 2018 01:45

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