Pub Date : 2015-07-01DOI: 10.4103/2423-7752.170581
Shahrzad Khoramnejadian, K. Saeb
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.
背景:植物修复是近年来应用于污染去除的一种环保方法。目的:研究苋菜和波斯三叶草对重金属(Cr、Cd、Cu、Ni)的植物修复作用。背景:制备不同污染程度的土壤样品。污染土壤样品在温室中保存，逆花在聚丙烯花盆中栽培。对耕作前后土壤样品重金属含量进行了分析。结果与讨论:经过120 d的栽培，土壤重金属含量有所下降。测定了重金属在植物组织中的累积量。计算了易位因子(TF)。植株根部到上部的TF依次为Cr > Cu > Ni > Cd，植株根部到上部的TF依次为Ni > Cr > Cd > Cu。苋菜在重金属含量较高的土壤中具有较强的抗性。结果表明，苋菜对污染土壤中的重金属具有较好的去除能力。结论:根据结果，紫花苋植物修复是修复污染场地的一种经济有效的选择。
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