Abstract
Background: Phytoremediation is an ecofriendly method that recently used for contamination removal. Aim: n this article, phytoremediation of heavy metals (Cr, Cd, Cu, and Ni) by amaranth and Persian clover has been studied. Context: Soil samples with different amount of contamination were prepared. Contaminated soil samples keep in greenhouse and Amaranthus retroflexus cultivated in polypropylene pots. Before and after cultivation soil samples heavy metal amount has been analyzed. Result and Discussion: The amount of heavy metals in soils decreased after 120 days cultivation. Accumulations of heavy metals in plant tissues were measured. Translocation factor (TF) has been calculated. TF from root to upper part of plants in the order of Cr > Cu > Ni > Cd and TF from root to upper part of plants in the order of Ni > Cr > Cd > Cu. Amaranthus were resistance among high amount of heavy metal in soils. Result indicated that Amaranthus retroflexus has a good ability to remove heavy metal from contaminated soils. Conclusion: According to resultphytoremediation by Amaranthus retroflexus is a good and economical choice for remedy contaminated site.
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