Arsenic speciation in plant samples from the Iron Quadrangle, Minas Gerais, Brazil.
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Data
2005
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Resumo
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 (6–900 mgg 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.
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Arsenic speciation, Ferns, Bioaccumulation, Iron Quadrangle
Citação
DAUS, B. et al. Arsenic speciation in plant samples from the Iron Quadrangle, Minas Gerais, Brazil.. Mikrochimica Acta, v. 151, n.3-4, p. 175-180, 2005. Disponível em: <https://link.springer.com/article/10.1007/s00604-005-0397-5>. Acesso em: 20 de jun. 2017.