Published January 1, 2013
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Cr(III) biosorption by forest wastes from Araucaria angustifolia and Pinus elliottii: biosorbent surface characterization and chromium quantification by spectrofluorimetry in micellar medium
Creators
- 1. Pontificia Univ Catolica Rio Grande do Sul, Fac Chem, BR-90619900 Porto Alegre, RS, Brazil
- 2. Univ Fed Santa Catarina, Dept Chem, Natl Inst Sci & Technol Catalysis, BR-88040900 Florianopolis, SC, Brazil
Description
This work describes the characterization of the solid biomass, and its aqueous extracts, obtained from the cones of Araucaria angustifolia and Pinus elliottii, in order to understand the mechanism of Cr(III) biosorption in these biosorbents, as well as to characterize the residues of the process. Trivalent chromium was quantified, for the first time in a complex biomass system, by fluorescence suppression using naphthalene as probe, and the quantification could be used safely for both biosorbents Araucaria and Pinus. The results showed that Cr(III) can be effectively removed using Araucaria and Pinus wastes and their biosorption capacities are higher than those of other lignocellulosic materials under similar conditions. Carboxylic moieties present on the biosorbent surface seem to play a major role on Cr(III) binding.
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