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- Title
Ni Phytoaccumulation in Mentha aquatica L. and Mentha sylvestris L.
- Authors
Zurayk, Rami; Sukkariyah, Bishr; Baalbaki, Riad; Abi Ghanem, Daad
- Abstract
Ni phytoaccumulation in Mentha aquatica L. and Mentha sylvestris L., two hydrophytes that had shown high Ni accumulation potential in previous screenings, was evaluated for possible inclusion in aquatic phytoremediation systems. The plants were grown for 14 days in full-strength (FS) and half-strength (HS) Hoagland's solutions spiked with 1, 2, 4, and 8 mg L-1 Ni. Roots and shoots were harvested and analysed for Ni. Ni accumulation and bioconcentration factor (BCF) generally increased with increasing external Ni levels, except for shoot Ni in HS solution at 8 mg L-1, which was lower than at 4 mg L-1. We suggest that a mechanism may exist to control Ni entry to the shoot at high external Ni levels in order to reduce injury. Ni phytoaccumulation and BCF were consistently larger in the HS solution, probably resulting from interaction between Ni and other nutrients, and indicating that manipulation of the nutrient concentration is a possible avenue for improving the efficiency of aquatic phytoremediation. Due to their large growth rates and biomass, both species accumulated Ni in the roots to levels equal or superior to those of known phytoremediator plants (8327 for M. aquatica and 6762 mg kg-1 for M. sylvestris), indicating their adequacy for use in phytoremediation systems.
- Subjects
MINTS (Plants); PHYTOREMEDIATION; NICKEL; PLANT roots; PLANT shoots; BIOLOGY
- Publication
Water, Air & Soil Pollution, 2002, Vol 139, Issue 1-4, p355
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/A:1015840601761