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Several species of plants have developed a tolerance to metal that enables them to survive in metal contaminated and polluted sites. Some of these aquatic plants have been reported to accumulate significant amounts of specific trace elements and are, therefore, useful for phytofiltration. This work focuses the potential of aquatic plants for the phytofiltration of uranium (U) from contaminated water. We observed that Callitriche stagnalis, Lemna minor, and Fontinalis antipyretica, which grow in the uraniferous geochemical province of Central Portugal, have been able to accumulate significant amounts of U. The highest concentration of U was found in Callitriche stagnalis (1948.41 mg/kg DW), Fontinalis antipyretica (234.79 mg/kg DW), and Lemna minor (52.98 mg/kg DW). These results indicate their potential for the phytofiltration of U through constructed treatment wetlands or by introducing these plants into natural water bodies in the uraniferous province of Central Portugal.
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Keywords: Callitriche stagnalis; Fontinalis antipyretica; Lemna minor; aquatic macrophyte; in-situ remediation; phytofiltration

Document Type: Research Article

Affiliations: 1: Department of Earth Sciences, Faculty of Sciences and Technology,University of Coimbra, Portugal 2: Geosciences Center, Faculty of Sciences and Technology,University of Coimbra, Portugal 3: Department of Plant Sciences,University of Hyderabad, Hyderabad, India

Publication date: March 1, 2012

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