Evaluation of Some Heavy Metals Accumulation within the Soil and Crops Around Industrial Town of Shahr-E-Kord

Mehrab Yadegari¹ and Afsaneh Karimipour Dehkordi²

¹Faculty of Agriculture, Islamic Azad University- Shahrekord Branch- Shahrekord (Iran). ²Master Science of Environmental Science, (Iran).

ABSTRACT: To study the amount of heavy metals at Shahr-e-Kord industrial town, the experiment was conducted in 2010. The region of investigation located 10 Km from Shahr-e-Kord (latitude 32 0 44 / N, 2100 m asl), located at about 100 km of Isfahan and 500 km of the capital town of Iran. The existing of different manufactories such as carton, paper, production of sugar, providing textile, making ceramic tile, sanitary facilities, dyeing industry, dairy products, metal industry and cladding of metals causing the increase in spreading the heavy metals like Ni, Pb, Cr and Cd in this region. Although in most cases plants which grow in agricultural soils including heavy metals, they keep more metals in their tissues. However, the main objective of implementing and investigating this research was to clarify the amount of absorption of heavy metals such as Ni, Pb, Cr and Cd in agronomy crops inclusive: Wheat (Triticum aestivum from Gramineae family), Turnip (Brassica napus L. from Cruciferae family) and range plants inclusive: Tragacanth (Astragalus sp from Leguminosae family), Sojak (Scariola orientalis from Compositae family) surroundings of Shahr-e-Kord industrial industrial-town. Therefore after the accomplishment of the required studies, sample stations have been accidentally chosen at the distance of 100, 300, 600, 1000, 2000, 3000 and 5000 meters from the North, South, East and West of research area. Sampling of aerial, land construction and soils existed in this region has been done. Five samples have been taken at each station and then the average of these samples was evaluated at laboratory. Analyzing the soils from sample stations indicated that the maximum concentration existed among metals regularly related to Ni (1926 ppb), Cd (504 ppb), Pb (122 ppb) & Cr (78 ppb). Nevertheless at most cases the maximum concentration existed among heavy metals regularly associated with Ni, Pb, Cr and Cd in shoots of plants. Range plants accumulated more heavy metals than agricultural crops in their organs. The maximum concentration of heavy metals was regularly observed in the North, West, East and South respectively. In the most cases the amount of heavy metals concentration was more than it would be the root part of plants in which range plants (Tragacanth, Sojak) have higher concentration than agronomy crops (Wheat, Turnip). Among different plants accumulated concentration of metals were observed in Tragacanth, Sojak, Wheat, and Turnip respectively.

KEYWORDS: Agronomy and Range Plants; Heavy metals; Pollution; Shahr-e-Kord industrial town; Soils.

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