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Selective sorption of ferric ion onto a crosslinked resin bearing triphenylphosphinimine residues

Chanda, M and Rempel, GL (1991) Selective sorption of ferric ion onto a crosslinked resin bearing triphenylphosphinimine residues. In: Reactive Polymers, 16 (1). pp. 19-27.

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Official URL: http://dx.doi.org/10.1016/0923-1137(91)90282-S

Abstract

A polymeric sorbent containing triphenylphosphinimine residues has been obtained from crosslinked chloromethylated polystyrene by azidation, using phase-transfer catalysis, followed by reaction with triphenylphosphine at room temperature. The sorbent exhibits 100 % sorption selectivity for Fe(III) in the presence of Cu(II), Fe(II), Ni(II), Co(II), Mn(II), and Zn(II) in aqueous media. In the absence of Fe(III), however, Fe(II) is selectively sorbed over the other metal ions, and in the absence of both Fe(II) and Fe(III), Cu(II) has the highest selectivity of sorption on the resin. The sorption of Fe(III) is sensitive to pH, being maximum at pH not, vert, similar 2 and falling sharply at both higher and lower pH values. The sorbed Fe(III) is easily stripped with dilute HCl and the resulting protonated resin is regenerated to its original sorption capacity by treatment with dilute NaOH at room temperature.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Ferric ion;selective sorption;triphenylphosphinimine residues;polymeric sorbent;polystyrene,functionalized.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 30 Nov 2010 07:54
Last Modified: 30 Nov 2010 07:54
URI: http://eprints.iisc.ernet.in/id/eprint/34125

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