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Vander de Freitas Melo ; Yara Jurema Barros ;Revista Brasileira de Ciência do Solo 2013, 37 2

Autor: Larissa Kummer

Fuente: http://www.redalyc.org/


Introducción



Revista Brasileira de Ciência do Solo ISSN: 0100-0683 revista@sbcs.org.br Sociedade Brasileira de Ciência do Solo Brasil Kummer, Larissa; de Freitas Melo, Vander; Barros, Yara Jurema LEAD AND ZINC IN THE STRUCTURE OF ORGANIC AND MINERAL SOIL COMPONENTS Revista Brasileira de Ciência do Solo, vol.
37, núm.
2, 2013, pp.
438-449 Sociedade Brasileira de Ciência do Solo Viçosa, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=180226346015 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative 438 Larissa Kummer et al. LEAD AND ZINC IN THE STRUCTURE OF ORGANIC AND MINERAL SOIL COMPONENTS(1) Larissa Kummer(2), Vander de Freitas Melo(3) & Yara Jurema Barros(4) SUMMARY In addition to the more reactive forms, metals can occur in the structure of minerals, and the sum of all these forms defines their total contents in different soil fractions.
The isomorphic substitution of heavy metals for example alters the dimensions of the unit cell and mineral size.
This study proposed a method of chemical fractionation of heavy metals, using more powerful extraction methods, to remove the organic and different mineral phases completely.
Soil samples were taken from eight soil profiles (0-10, 10-20 and 20-40 cm) in a Pb mining and metallurgy area in Adrianópolis, Paraná, Brazil.
The Pb and Zn concentrations were determined in the following fractions (complete phase removal in each sequential extraction): exchangeable; carbonates; organic matter; amorphous and crystalline Fe oxides; Al oxide, amorphous aluminosilicates and kaolinite; and residual fractions.
The complete removal of organic matter and mineral phases in sequential extractions resulted in low participation of residual forms of Pb and Zn in the total concentrations of these met...





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