The use of a cellulose ion-exchanger (Hyphan) for the isolation of MnO4 −, CrO4 2- and MoO4 2- from aqueous solution after reduction with different reducing agents is described. After preconcentration, Mn(II), Cr(III) and molybdenum cations were determined by atomic absorption spectrometry. Furthermore, the distribution coefficients Kd of the investigated cations as a function of pH were studied, and are in the range 104.3−105.9 cm3 g−1 for the above cations. The interfering effects of different foreign ions were studied. Moreover, the metal complexes formed by the chelating ion-exchanger are characterized by ir spectroscopy, magnetic measurements and thermal analysis. An analytical application for the preconcentration and separation by cellulose-Hyphan and determination of metal ions studied in tap, Nile, waste and sea water was carried out.
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Kenawy et al. (1993) studied this question.
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