Interaction between aqueous chromium solutions and layer silicates
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文摘
The interactions between Cr in aqueous solutions and phyllosilicates were studied to determine: (a) the amount of Cr(VI) to Cr(III) reduction in aqueous solutions by Fe(II)-bearing phyllosilicates; (b) the removal of the Cr species from solution by interaction with phyllosilicates, as a function of Cr(III) concentration and anionic environment. Chlorite, corrensite and montmorillonite were reacted with solutions containing Cr(VI) (1.62×10−3 N, 5.77×10−3 N and 1.32×10−1 N, respectively). The sorption/desorption of Cr(III) by saponite was investigated in different anionic environments (Cl−, NO−3 and CH3COO−) and at different initial Cr(III) concentrations (3.21×10−3 N, 5.49×10−3 N and 8.49×10−3 N).