Assessment of Effective Factors on Soil Pollution by Heavy Metals in a Part of Sirjan Plain, Kerman Province, Iran

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Naderi Khorasgani M.; Azarbeig T.; Mohammadi j.

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Journal Paper

Paper Information

Journal: Journal of Water and Soil Science Year:2023 | Volume:27 | Issue:3 Page(s): 165-177

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Information Journal Paper

Title

Assessment of Effective Factors on Soil Pollution by Heavy Metals in a Part of Sirjan Plain, Kerman Province, Iran

Author(s)

Naderi Khorasgani M. | Azarbeig T. | Mohammadi j. | Issue Writer Certificate

Keywords

Soil pollutionQ4

AeoliansQ4

Soil contaminant originQ4

Soil contaminant mappingQ4

Abstract

Soil pollution by heavy metals is a significant issue that threatens human health directly and indirectly. The objectives of this research were to map the extension of some heavy metals in soils of a part of Sirjan Plain, Kerman province, to study the role of natural agents on the distribution of heavy metals, and to assess the risk of soil heavy metal concentration for human health. 120 surficial (0-15 cm) compound soil samples were collected during fieldwork. Soil characteristics like soil texture components, pH, electrical conductivity, organic matter, and total soil heavy metal (Fe, Cu, Zn, Cd, and Pb) concentrations were measured using standard protocols. The mapping of soil texture components and heavy metals was done by the usual Kriging method. Results indicated significant correlation coefficients between soil texture components (silt and clay) and total soil Fe and Cu concentrations. Dominant wind direction and spatial distribution of Fe, Cu, and Zn strongly induced the possible dust-born origin of such elements. Results revealed that the sources of Fe, Cu, and Zn were different from those of Cd and Pb. Maximum soil Fe, Cu, and Zn concentrations were in the southern part of the study area, increasing in an upwind direction while for Cd and Pb, maximum soil concentrations were in the northern part of the study area. The Nemerow integrated pollution index revealed that soils were clean for Cd, lowly polluted for Fe, Pb, and Cu, and moderately polluted for Zn.

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