Phytoremediation potential of tree species in soil contaminated with lead and cadmium
نویسندگان
1 Department of Green Space Engineering, Islamic Azad University, Malayer Branch, Malayer, Iran
2 Department of Green Space Engineering, Islamic Azad University, Malayer Branch, Malayer, Iran
3 Department of Green Space Engineering, Islamic Azad University, Malayer Branch, Malayer, Iran
4 Department of Environment, Islamic Azad University, Parand Branch, Parand, Iran
5 Department of Forestry, Islamic Azad University, Lahijan Branch, Lahijan, Iran
doi
10.22124/cjes.2024.8073چکیده
Phytoremediation is an economical and environmentally friendly technology in which the selection of species capable of adapting to contaminated environmental conditions is essential. This study aimed to investigate the rate of purification of lead (Pb)- and cadmium (Cd)- contaminated soil by Pine, Pinus eldarica Medw., Cypress, Cupressus arizonica Greene., Locust tree, Robinia peseudoacacia L., Elm tree, Ulmus carpinifolia var. umbraculifera Rehd. and Ash, Fraxinus rotundifolia Mill. in Tehran. For this purpose, in the summer 2022 to provide the control and contaminated sites, according to the dominant wind direction, for any tree species, a transect was chosen, each with 10 selected trees. The sampling of leaves and roots of trees was performed in a completely-randomized statistical design with three replications. Afterward, Pb and Cd concentrations in each were measured using Perkin Elmer 3030 Atomic Absorption Spectrophotometer. The results showed that the Pb and Cd concentrations in the tree leave and roots in the contaminated sites were higher than in the control site. Also, Pine, Cypress, and Locust exhibited the highest translocation factor (TF) of Pb (3.49 ppm, 2.99 ppm, and 2.82 ppm), and Cd (3.35 ppm, 2.83 ppm, and 1.92 ppm) from their roots to leaves. According to this issue and suitable adaptation conditions, these three species can be used to purify lead and cadmium contaminated soil in similar areas.
