The sources and the potential availability of chromium were investigated in ultramafic soils
from Niquelândia (Goïas 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 …

Solid speciation and availability of chromium in ultramafic soils from Niquelândia (Brazil) :
chemical and spectroscopic approaches - Archive ouverte HAL …