Source, Spatial Distribution and Pollution Assessment of Pb, Zn, Cu, and Pb, Isotopes in urban soils of Ahvaz City, a semi-arid metropolis in southwest Iran

Ahad Nazarpour; Michael J Watts; Ayoub Madhani; Somayeh Elahi

doi:10.1038/s41598-019-41787-w

Source, Spatial Distribution and Pollution Assessment of Pb, Zn, Cu, and Pb, Isotopes in urban soils of Ahvaz City, a semi-arid metropolis in southwest Iran

Sci Rep. 2019 Mar 29;9(1):5349. doi: 10.1038/s41598-019-41787-w.

Authors

Ahad Nazarpour¹, Michael J Watts², Ayoub Madhani³, Somayeh Elahi⁴

Affiliations

¹ Department of Geology, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran. Ahad.nazarpour@gmail.com.
² Inorganic Geochemistry, Centre for Environmental Geochemistry, British Geological Survey Keyworth, Nottingham, UK.
³ Department of civil engineering, Abadan Branch, Islamic Azad University, Abadan, Iran.
⁴ Department of Chemistry, Abadan Branch, Islamic Azad university, Abadan, Iran.

Abstract

This study examined the status of toxic metal contamination of the urban industrial city of Ahvaz in Iran. Two hundred and twenty-seven surface soils from a depth horizon of 0-10 cm were collected from urban areas. In addition, 15 soil samples were collected to recognise the sources of Pb in urban topsoils in Ahvaz city. Mean concentration of Pb, Zn, Cu and As were 181 ± 167, 123 ± 118, 185 ± 167 and 6.9 ± 8.9 mg.kg^-1, respectively. Results of inter-element relationship among studied toxic metals revealed that Pb, Zn and Cu may have the same anthropogenic origin, whilst As originated from different sources. The results of pollution index (PI) and Nemerow pollution index (NPI) implied that Pb, Zn, and Cu had a moderate to high level of pollution. The Pb isotopic composition analysis suggested clear anthropogenic origins of Pb including industrial emission, vehicle exhaust and dust storm with the mean contributions of 47%, 15% and 7%, respectively, by a four-end member model.

Publication types

Research Support, Non-U.S. Gov't