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Phytoremediation of the Arsenic Contaminated Soils by Different Fern Species in Northern of Iran

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Author(s): Mahboub Saffari | Hamed Fathi | Gholamreza Mohajery | Mostafa Emadi | Masome Moazallahi | Mehdi Goudarzi

Journal: Research Journal of Biological Sciences
ISSN 1815-8846

Volume: 3;
Issue: 8;
Start page: 947;
Date: 2008;
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Keywords: Arsenic | ferns | hyperaccumulators | phytoremediation | pteris umbrosia

ABSTRACT
Phytoremediation is the use of plants to remove, metabolize or degrade toxic environmental materials. The prerequisite for successful phytoremediation is the existence of hyperaccumulator plants. Designed to search for new arsenic (As) hyperaccumulators, an experiment was conducted under greenhouse conditions in a completely randomized design with 3 replications. Speciation and distribution of arsenic in the plant can provide important information helpful to understanding the mechanisms for arsenic accumulation, translocation and transformation. We considered three species of native ferns in Iran as follow: Asplenium nidus (AN), Pteris umbrosia (PU), Polypodium vulgare (PV) and Pteris cretica (PC). The average As concentration ranged from 164-4820 mg kg-1 DW in the fronds and 23-510 mg kg-1 in the roots of (AN), (PU), (PV) and (PC) after having been grown in 120 mg As kg-1 soil. The result of our experiment showed percentage of As (III) was greater than As (V) in the fronds and roots. Based on our study, Pteris umbrosia is suitable for environmental conditions in northern of Iran. The nutrient requirements or distributions within the fern species were altered distinctly when the plants were exposed to As.
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