Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1518094 | Journal of Physics and Chemistry of Solids | 2006 | 6 Pages |
Abstract
Vermiculite of general formula [Si6.85Al1.15][Mg4.68Al0.51Fe0.63]O20(OH)4Ca0.128Na0.032K0.094 reacted with heteroaromatic amines α-, β-, and γ-picolines from aqueous solution. The products were characterized by elemental analysis, infrared spectroscopy, and X-ray diffraction. The intercalated nanocompounds maintained the crystallinity and changed the original interlayer distance of 1422 pm to 1474, 1456, and 1474 pm, for the sequence of the guest picoline molecules. Natural and intercalated vermiculite can remove copper at the solid/liquid interface; removal 0.40 mmol gâ1 was obtained for the original matrix, and 1.10, 0.92, and 1.33 mmol gâ1 for the intercalated forms. These values are near the capacity of cation exchange (CEC) of this clay mineral, which can be possibly used as source of copper removal from aqueous solution.
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Authors
Maria G. da Fonseca, Cassio M. Cardoso, Albaneide F. Wanderley, Luiza N.H. Arakaki, Claudio Airoldi,