University of Tehran/Springer International Journal of Environmental Research 1735-6865 9 1 2015 01 01 Characterization andmetals fractionation of street dust samples fromTehran, Iran 213 224 891 10.22059/ijer.2015.891 EN M. Salmanzadeh Graduate Student, School of Civil Engineering, Iran University of Science and Technology, Iran M. Saeedi School of Civil Engineering, Iran University of Science and Technology, Iran. Department of Civil Engineering, TheUniversity of British Columbia, Canada L.Y. Li Department of Civil Engineering, TheUniversity of British Columbia, Canada 4Faculty of Environment, University of Tehran, Iran Gh. Nabi-Bidhendi Faculty of Environment, University of Tehran, Iran Journal Article 2014 12 31 Fifty street dust samples were collected from Southern and Eastern parts of Tehran, the capital<br />of Iran. Samples were collected during summer under dry and stable weather conditions. Total concentrations<br />of copper (Cu), cadmium (Cd), lead (Pb), chromium (Cr), nickel (Ni), zinc (Zn), iron (Fe), manganese (Mn)<br />and lithium (Li) were determined. Ten samples were then selected for characterization, metals fractionation<br />and single stage extraction studies. X-ray diffraction (XRD) and X-ray fluorescence (XRF) were utilized to<br />study the crystalline forms of metals and chemical compositions. In addition, sequential and single extraction<br />procedures were used to determine the concentrations of six heavy metals (i.e. Cu, Cd, Pb, Cr, Ni and Zn), and<br />also the mobility and bioavailability of elements. The risk assessment code (RAC) and IPOLLwere employed for<br />the risk assessment and pollution intensity of metals, respectively. Results showed that the single extraction<br />procedure could be used to estimate the total concentrations of most metals as an appropriate alternative for<br />total digestion. The mobility and potential availability of metals in Tehran street dust followed the order of Cd<br />> Zn > Pb > Cu > Ni > Cr. The risk assessment code results showed high risk for Pb, Cd and Zn and lowmedium<br />risk for Ni, Cr and Cu, and correlated positively with I_POLL result. https://ijer.ut.ac.ir/article_891_9c4083bce35d06ffd0a94a7a0c4f03db.pdf