Investigation of Lead and cadmium contamination in some of agricultural crops

Document Type : Original Article

Authors

1 Senior Expert and head of Heavy Metal analysis Lab in Department of Environment of Iran

2 doe

3 Expert of Heavy metal Lab

4 Faculty of Biology, University of East Tehran Braanch (Ghiyam Dasht), Tehran, Iran

Abstract

Contamination of Soil and Agricultural products with metals, due to development of industries as well as improper use of chemical and livestock fertilizers on agricultural land, is considered as a serious threat to quality of these products and human health. Present study was carried out on products such as Lettuce, Cucumber, Tomato and Carrot prepared from Vegetable Center Squire in Tehran - Nawab, to determine concentrations of Cd and Pb.Samples were analyzed by AAS after digestion. Levels of Cd in all the analyzed products as well as the amount of Pb in products Tomato and Carrot were below the standard level provided by Iran and the FAO-WHO. But the amount of Pb in the Lettuce and Cucumber were higher than standard Presented by Iran and FAO-WHO in the summer. So There was significant difference in levels of Pb (P<0.05) in among vegetables lettuce and cucumber with tomatoes and carrots and the Maximum limit of Pb in lettuce and cucumber (P<0.05) as well in this season. But the difference was not significant between the concentration of Cd in these products (p>0.05). The results of this research show that however level of Pb in lettuce and cucumber was high, absorption estimated value of each element (EDI) in these products was less than the intake level of tolerable daily temporary (PTDI) that are reported by the Standard Institution. Considering the possible health outcomes due to the consumption of contaminated vegetables, it is required to take proper actions for avoiding people's chronic exposure.

Keywords

Journal of Environmental Science Studies
Volume 1, Issue 3
March 2017
Pages 69-77

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