Enhanced phytoextraction is accomplished by the application of chelates for remediation of polluted soils. Using pot experiments, the effect of the application of EDTA (3 mmol kg-1), EDDS (3 mmol kg-1), and EDTA+EDDS (1.5 mmol kg-1 of each) on the uptake of Zn and Cd by corn (Zea mays) was studied. The results of this investigation demonstrated that the induced phytoextraction of Zn by corn was more pronounced than Cd. Application of EDDS was more efficient in increasing the concentrations of metals studied in corn shoots, especially for Zn. It was thought that the major role of EDDS might be to increase the uptake and translocation of Zn from the roots to the shoots of plants. The simultaneous application of EDTA+EDDS in general showed superior response, and combined applications in different ratios could be as an alternative in induced phytoextraction to minimize unwanted disadvantages.

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