Potential Uptake of Heavy Metals by Some Tree and Shrub Species Used in Shahrekord Landscape

Subject Areas : Environmental pollutions (water, soil and air)

Fatemeh Mostafavi ¹ , Mohsen Bahmani ² , Rasool Zamani-Ahmadmahmoodi ³ , Ali Jafari ⁴

1 - M.Sc. Student, Forestry, Faculty of Natural Resources and Earth Sciences, Shahrekord University, Shahrekord, Iran
2 - Assistant Prof., Faculty of Forest Science, Department of Natural Resources and Earth Sciences, Shahrekord University, Shahrekord, Iran
3 - Associate Prof., Faculty of Fisheries and Environmental Sciences, Department of Natural Resources and Earth Sciences, Shahrekord University, Shahrekord, Iran
4 - Associate Prof., Faculty of Fisheries and Environmental Sciences, Department of Natural Resources and Earth Sciences, Shahrekord University, Shahrekord, Iran

Received: 2017-08-23 Accepted : 2018-03-15 Published : 2020-06-21

Keywords: Biomonitoring, Shahrekord Township, Tree species, urban traffic, Heavy Metals,

Abstract :

Background and Objective: Biomonitoring is a simple and inexpensive method for assessment of the quality of the environment. Vehicle emissions introduce high levels of heavy metals into the atmosphere. The use of plant species can be effective in assessing and decreasing air pollution and the levels of heavy metals. This research was conducted to select the best accumulator of lead, zinc and cadmium in the leaves of four tree species, namely Thuja Orientalis, Ulmus umbraculifera, Fraxinus Rotundifolia and Ligustrum Ovalifolium,in four areas in the city of Shahrekord, Iran, with different traffic levels.Method: For this purpose, testing was conducted in areas with high levels of traffic (Kashani Street, Saadi Street and Shahrekord Terminal) as polluted areas, and Shahrekord University served as control area. In two periods, at the end of spring and the end of summer, leaves were sampled.Findings: Results showed that heavy metal levels in one polluted area, Kashani Street, were higher than in other areas. Also, the highest level of lead and zinc accumulation was observed in the leaves of Ligustrum Ovalifolium with levels of 5.47 and 32.68 mg/kg. The highest level of cadmium, 1.84 mg/kg, was observed in the leaves of Thuja Orientalis.Discussion and Conclusions:according to the results,Ligustrum Ovalifolium, Thuja Orientalis, Ulmus Umbraculifera and Fraxinus Rotundifolia were introduced as the best wood species for accumulating heavy metals.

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