Assessment of heavy metals pollution in the soil of Hashtgerd and Nazarabad cities, after three decades of industrialization

Articles in Press

Authors

1 Urmia University - Faculty of Science - Department of Geology

2 Faculty member of Geology Department of Urmia University

3 Department of Geology, Faculty of Science, Urmia University, Iran

Abstract

The amount of heavy metals in the soil affects the ecosystem due to agricultural inputs, urbanization and industrialization. The area of Hashtgerd and Nazarabad cities was evaluated due to different uses, 250 geochemical samples were taken and prepared by partial digestion method (METHOD 3050B). The samples were analyzed using MS-ICP.
Pollution indices were used to evaluate the level of heavy metal pollution in the soil. By comparing the average pollution factor of heavy metals in the soil based on the classification of pollution factor value, nickel element number (6.33) shows very high pollution and chromium and arsenic values show moderate pollution. According to the pollution security index, the north side and a part of the south of the range are medium in terms of pollution security. Enrichment factor is a suitable method to separate natural and human origin of pollution.
According to the cluster diagram obtained from the statistical analysis, aluminum, iron and magnesium elements are in one cluster and are not closely correlated with other polluting elements, so this shows that heavy metal pollution is not geogenic.
In the studied area, nickel > arsenic > chromium > copper > lead > zinc elements show a significant and moderate enrichment, especially in the north of the region, which has led to a decrease in the quality of the soil in the region, and this represents the significant contribution of human factors. The phenomenon is within the scope of the study.

Keywords

Main Subjects

Advanced Applied Geology

Articles in Press, Corrected Proof
Available Online from 24 August 2024

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