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Aquatic plant communities are good candidates for treating groundwater contamination systems due to large surface area, ease of culture and high organic uptake potential. We investigated the potential of the Nymphaeaceae high-biomass Ni hyperaccumulator to phytoextract Cr and Ni from artificial metalliferous media. Nymphaeaceae was collected from area located in Anzali lagoon (Iran) where is full o f Nymphaeaceae’s. Plants were treated with 100-600 ìM of Chromium and Nickel solutions for 10 days. Cr was introduced independently at two speciations as Cr (III) and Cr (VI), which are known for their diverse physicochemical properties and different influence on living organisms. None-parametric Kruskal–Wallis/Mann–Whitney U tests were applied to compare differences between objects. Non-parametric multiple comparison test (Dunn’s test) was performed to determine statistical significance of results at α = 0.05. Results indicate significant differences in Cr distribution in both groups of Cr-treated plants and in the plants exposed to Cr (III) and Cr (VI). The amount of Cr deposited in leaves in both Cr-treated plants differed significantly. As expected the heavy metals uptake rate by this plant is significantly affected by number of plant cultivated as for Nickel uptake (p<0.03) while for chrome the p-value was less than 0.01. The results of this research concluded that Nymphaeaceae in the contaminated water had suitable ability for phytoremediation by method and transmitting more Chrome and Nickel in pH ≤ 7 after 10 days of growth of Nymphaeaceae spices. Plant accumulation of all metals from single-element substrates indicate that the bioaccumulation coefficient increases as total metal concentrations increase.

Phytoremediation of Heavy Metal Contaminated Water Using Potential Caspian Sea Wetland Plant: Nymphaeaceae