Chromium Phytoaccumulation from Solution by Selected Hydrophytes |
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Authors: | Rami Zurayk Beshr Sukkariyah Riad Baalbaki Daad Abi Ghanem |
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Affiliation: | Faculty of Agricultural and Food Sciences , American University of Beirut , P. O. Box: 11-236, Riad El Solh 1107 2020, Beirut, Lebanon Phone: 961 1 374374, 4571 Fax: 961 1 374374, 4571 E-mail: rzurayk@aub.edu.lb |
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Abstract: | There is increasing interest in the role of wetland plants in the aquatic phytoremediation of toxic metals. In this experiment, we evaluate the Cr removal capacity of four hydrophyte species (Nasturtium officinale L., Veronica beccabunga L., Mentha longifolia L., R.Br., Cardamine uliginosa L.) under varying nutritional conditions (full-strength and half-strength solution cultures), and over a range of Cr concentration (0, 2, 4, 6, and 8 mg L-1). The results indicate that Cr accumulation is affected by both initial Cr concentration and strength of the nutrient solution. Phytoaccumulation increased with initial Cr concentration and plants grown in the full-strength solution accumulated more Cr at the higher initial solution concentration. Cr was predominantly accumulated in the roots, with minimal shoot translocation, which limits the hazard of Cr entering the food chain through ingestion by animals. Accumulation was large and reached up to 6700 mg Cr Kg-1 in the roots of Veronica beccabunga. |
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Keywords: | rhizofiltration trace metals wetland plants Nasturtium officinale L., Veronica beccabunga L., Mentha longifolia L., R.Br., Cardamine uliginosa L |
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