Microchimica Acta, Nov, 2005, Vol.152(1), p.175
Byline: Birgit Daus (1), Rainer Wennrich (1), Peter Morgenstern (1), Holger Weiss (1), Helena Eugenia Leonhardt Palmieri (2), Herminio Arias Nalini (3), Liliam Viana Leonel (2), Roberto Pellacani Guedes Monteiro (2), Rubens Martins Moreira (2) Keywords: Key words: Arsenic speciation; ferns; bioaccumulation; Iron Quadrangle. Abstract: Several plants, especially ferns, have been shown to tolerate and accumulate high arsenic concentrations in soils. The leaves and roots of the ferns Pteris vittata (Chinese brake) and Pityrogramma calomelanos as well as a medical plant (Baccharis trimera) were sampled together with their associated soils in a region impacted by ore mining, the Iron Quadrangle in Brazil, where arsenic concentrations in the soils vary sharply (6--900Augg.sup.-1). The bioaccumulation factors were found to be low compared to the literature data, which can be explained by the low water-soluble fraction of arsenic in soil. The arsenic species in the plants were mainly arsenite. In comparison to the rhizoid samples, the concentrations of arsenic were higher in the leaves of the fern samples. The medical plant behaved differently. The bioaccumulation factor was low (0.7), and trimethylarsine oxide was detected as the third arsenic species beside arsenite and arsenate in both the roots and the leaves. Author Affiliation: (1) UFZ -- Centre for Environmental Research Leipzig-Halle, Leipzig, Germany (2) Centro de Desenvolvimento da Tecnologia Nuclear/Comissao Nacional de Energia Nuclear -- CDTN/CNEN, Belo Horizonte, Minas Gerais, Brazil (3) Departamento de Geologia, Universidade Federal de Ouro Preto, (Degeo/UFOP), Ouro Preto, Minas Gerais, Brazil Article History: Registration Date: 01/01/2005 Received Date: 10/10/2004 Accepted Date: 24/05/2005 Online Date: 22/08/2005
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