Exploring the Efficiency of Native Tree Species Grown at Mine Tailings for Phytoextraction of Lead and Iron
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Four (4) prominently growing tropical tree species were screened for their tolerance to heavy metals and evaluated for their suitability for remediation, at a contaminated site. The partitioning of Iron (Fe) and Lead (Pb) between roots and above-ground aerial parts of the trees, bioconcentration factor (BCF) and translocation factor (TF) were used to determine the remediation potential of the studied trees. Ficus racemosa recorded the highest BCF for both the metals, Fe and Pb. The maximum TF was recorded in T. arjuna for Fe and F. racemosa had the highest TF value for Pb. The recorded BCF and TF values suggested that these tropical tree species can be classified as efficient metal trappers for Fe and Pb. The Pb accumulation was much higher in all the four (4) tree species than the described limit for a Pb-hyperaccumulator (0.1%), revealing the hyperaccumulator potency of all the screened trees.
KeywordsDalbergia sissoo Ficus racemosa Pithecellobium dulce Phytoremediation Terminalia arjuna
The study was funded by the Department of Science and Technology, New Delhi in the form of DST INSPIRE (DST Inspire/IF-150198/2015) and DST-FIST (Sl. No. 270 for tenure of 2013–18). It is also supported financially by University Grants Commission, New Delhi in the form of Rajiv Gandhi National Fellowship (F1-17.1/2013-14/RGNF-2013-14-SC-CHH-36789).
Compliance with Ethical Standards
Conflict of interest
The authors declare that there is no conflict of interest to publish this manuscript.
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