Environmental Investigation and Spatial Distribution of Heavy Metals in the Street Dust of Ahvaz City

Authors

  • Ghanavat, N. 1- Department of Soil Science, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
  • Moradian, F. 1- Department of Soil Science, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
  • Nazarpour, A. 2- Department of Geology, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
Abstract:

Dusts contain heavy metals such as Pb, Zn, Cu, Cr, Cd and As that can threat humanchr('39')s health and environment. Therefore, the spatial distribution of heavy metals concentration and soil pollution monitoring and environmental quality protection seem to be essential. To assess heavy metals pollution level in Ahvaz street dust, 115 street dust samples were collected from main pedestrians. The samples were analyzed by Atomic Absorption (AAS). The pollution level was estimated based on the geo-accumulation index (Igeo), contamination factor (CF) and the enrichment factor (EF). The average concentration values of Pb, Zn, Cu, Cr, Cd and As were found to be 197.6, 150.1, 179.7, 101, 5.6 and 14.2 mg/kg, respectively. Pearsonchr('39')s correlation coefficient also indicated that Pb, Zn, Cu and Cr had a significant correlation showing similar possible anthropogenic sources. On the other hand, Cd and As showed a lower correlation with other metals, indicating that they belonged to the geogenic sources. The results of contamination factor, enrichment factor and geo-accumulation index also indicated that Pb, Zn, Cu and Cd had a high contamination level.  Also, areas with high population density, heavy traffic volume, and industrial activities exhibited a high level of heavy metals contamination.

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Journal title

volume 24  issue 3

pages  223- 237

publication date 2020-11

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