Abstract
A chelating polymer resin having iminodiacetic acid (IDA) as the functional group has been prepared for the selective adsorption of oxo-molybdenum(VI) or oxo-tungsten(VI). The 13C- and 1H-NMR spectra of these IDA complexes have been studied in the pH range of 4–7 to elucidate the complexation properties of the functional group. The NMR study in the homogeneous system suggests that the IDA forms a 1:1 complex with MoVI and WVI in the pH region 4–7. The peak integration of coordinated acetate signals indicates that the complex formation of IDA is much favorable with MoVI than with WVI. A selective adsorption of MoVI over WVI has been realized by the chelating resin having an IDA group. A mutual separation of MoVI and WVI has been demonstrated by the IDA resin in a column system.
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