Garnier J., Quantin C., Martins E.S., Becquer Thierry. (2006). Solid speciation and availability of chromium in ultramafic soils from Niquelandia, Brazil. Journal of Geochemical Exploration, 88 (1-3) Special Iss. SI, p. 206-209.
Titre du document
Solid speciation and availability of chromium in ultramafic soils from Niquelandia, Brazil
Journal of Geochemical Exploration, 2006,
88 (1-3) Special Iss. SI, p. 206-209
The sources and the potential availability of chromium were investigated in ultramafic soils from Niquelandia (Goias State, Brazil), with chemical extractions associated to mineralogical studies, in order to evaluate its bioavailability and its potential impact on the soil biodiversity. Cr contents are particularly high in the studied soils and its partitioning among the solid phase varies with the position in the landscape and depth. Most of the Cr is associated to Fe-oxides but the amount of exchangeable Cr(VI) is high, particularly in one soil profile. Cr availability is higher than expected, and Cr-tolerant vegetation is probably growing on these soils. (c) 2005 Elsevier B.V All rights reserved.
