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The influence of compost and nitrilotriacetic acid on mercury phytoextraction by Lepidium sativum
 L.

BACKGROUND: The investigations on enhanced phytoextraction are focused on both the influence of soil amendments on reclamation efficiency, and processes that occur in plant cells as its response to pollutants. The aim of the present study was to analyze the glutathione content (GSH) as a response of Lepidium sativum L. to substances used in assisted phytoextraction of mercury (Hg) contaminated soil. The simultaneous influence of compost from green wastes and nitrilotriacetic acid (NTA) on Hg accumulation and translocation was investigated. The study also focused on the Hg leaching after assisted phytoextraction. RESULTS: The results of the study showed that application of compost and NTA increased Hg translocation to plant shoots over 128–154%. A corresponding increase of GSH was observed. Application of soil enhancements decreased the concentration of leached Hg (LHg) around 24% when compared to Hg treated soil. CONCLUSION: Lepidium sativum L. showed the potential as a tolerant plant that can be used in biological soil reclamation process. Simultaneous application of compost and NTA promoted Hg phytoextraction efficiency and at the same time decreased the potential leachable fraction of Hg in soil. The increased Hg translocation to plant shoots was correlated with the growth of GSH content in plants, as a plant response to environmental conditions. © 2019 Society of Chemical Industry