期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 470, 期 -, 页码 993-1002出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2013.10.067
关键词
Bioaccumulation; Bioindication; Phytofiltration; Phytotechnologies; Uranium mine
资金
- European Fund for Economic and Regional Development (FEDER) through the Program Operational Factors of Competitiveness (COMPETE)
- National Funds through the Portuguese Foundation for Science and Technology [PEST-C/MAR/UI 0284/2011, FCOMP 01 0124 FEDER 022689, PTDC/CTE-GEX/66710/2006]
- Fundação para a Ciência e a Tecnologia [PTDC/CTE-GEX/66710/2006] Funding Source: FCT
A study was undertaken to determine Uranium concentrations in water and aquatic plants in the uraniferous region of Beiras, Central Portugal. Samples were collected from running water (n = 200) at places where aquatic species were observed. Plant samples were collected from 28 species of submerged, free-floating and rooted emergent plants including 2 bryophytes and 1 pteridophyte. Uranium concentrations in surface waters ranged from 0.23 to 1217 mu g L-1. The aquatic plant species studied, including several previously untested species, exhibited the ability to accumulate U in concentrations many times that of the ambient water. In general submerged plants exhibited higher U content followed by rooted emergent and free floating species. The highest U concentrations were observed in the bryophyte Fontinalis antipyretica (up to 4979 mg kg(-1)) followed by Callitriche stagnalis (1963 mg kg(-1)), Callitriche hamulata (379 mg kg(-1)), Ranunculus peltatus subsp. saniculifolius (243 mg kg(-1)), Callitriche lusitanica (218 mg kg(-1)), and Ranunculus trichophyllus (65.8 mg kg(-1)). In two out of three rooted emergent species U seemed to be preferentially partitioned in rhizome/roots with highest rhizome U content recorded in Typha latifolia (380 mg kg(-1)). Among the free-floating species, the highest U content (42.5 mg kg(-1)) was seen in Lemna minor. The bryophyte F. antipyretica and Callitrichaceae members seem to be promising candidates for the development of phytofiltration methodologies based on U accumulation, abundance and biomass production. (C) 2013 Elsevier B.V. All rights reserved.
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