EDTA-enhanced phytoextraction of Cd and Pb in spiked soil with Marigold and associated potential leaching risk

Abstract EDTA is a common chelating agent used in  phytoextraction for enhancing the trace elements uptake from soil to plants. But application of EDTA can cause ground water contamination, which is potentially a risk for human health. In this study EDTA-enhanced phytoextraction of Cd and Pb by Marigold. was evaluated. Application of EDTA could significantly increase Cd and Pb accumulation in the various part of plants, but EDTA addition also increased the Cd and Pb concentration in leached water about 8 to 12 time and 50 to 75 times respectively compared to the control.  So, insitu application of EDTA can be potentially risk to ground water contamination with trace elements.

Keywords EDTA, leached water, Marigold, phytoextraction.

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