investigation of Heavy Metal Contamination and Enrichment (Case Study: Shiraz Industrial Town and surrounding Lands)

Document Type : Research Paper

Authors

1 Department of Range and Watershed Management, Faculty of Agriculture, Fasa University, Fasa, Iran

2 Department of Geology, College of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran.

Abstract

Heavy metal pollution is one of the most serious environmental problems that is spreading around the world. The purpose of this study was to determine the rate of pollution and enrichment of heavy metals inside and around the industrial town of Shiraz. For this aim, 20 surface soil samples were gathered from a depth of 0 to 15 cm from inside and around Shiraz industrial town, and the concentrations of Pb, Cr, Al, Mn, Cu, Zn, St, V, N, Co, Sc, Fe As was evaluated using the ICP-method MS. The results showed that the average concentrations of Cu, Pb, Mn, Cr, Al, Zn, St, V, Ni, Co, Fe, As and Sc are 75, 87.9, 541.6, 143.3, 21804.8, 275.4, 439.9, 173.3, 55.4, 12.0, 50579.3, 4.8, and 4.7 mg / kg, respectively. The results showed that the average concentration of all elements except Al (21804.8 mg/kg) and Sc (4.7 mg/kg) is much higher than the concentration of these elements in global soils. In addition, Cu, Pb, Zn, V and Cr show much higher concentrations than standard Chinese and Canadian standards. Calculation of the enrichment coefficient of the mentioned elements in soil samples indicates high enrichment of Cu (8.32), Pb (5.42), Zn (7.04), St (5.15), V (5.04), and Cr (5.34). The results of the present study indicate that the soils of the region are contaminated with Cu, Pb, V, Mn and Zn. Therefore, it is suggested to reduce metals in the environment by different methods.

Keywords


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Volume 74, Issue 1
June 2021
Pages 37-51
  • Receive Date: 29 November 2020
  • Revise Date: 02 June 2021
  • Accept Date: 02 June 2021
  • First Publish Date: 02 June 2021