Sorption properties of oxides: III. Iron oxides

Venkataramani, B. ; Venkateswarlu, K. S. ; Shankar, J. (1978) Sorption properties of oxides: III. Iron oxides Journal of Colloid and Interface Science, 67 (2). pp. 187-194. ISSN 0021-9797

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Iron oxides have been prepared by wet method using Fe(III) and Fe(II) salt solutions in the ratio 2:1 and using different alkalis for precipitation. Only NH4OH gives a product which is mainly magnetite but noncrystalline. Sorption of alkali metal ions was studied under alkaline conditions and a series Li+<Na+<K+~Cs+ has been established for the first time. A sequence for the sorption capacities for the transition metal ions: Cu2+>Zn2+>Ni2+>Mn2+ has also been established. Sorption is quite significant even in the presence of salt solutions. It is postulated that transition metal ions are sorbed as hydrolyzed species. Sorption of Fe2+ and Fe3+ is complex.

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Deposited On:11 Apr 2011 13:29
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