Selectivity Series in the Adsorption of Metal Ions on a Resin Prepared by Crosslinking Copper(II)-Complexed Chitosan

Abstract

The pH dependencies in the adsorption of various metal ions on a resin prepared by crosslinking copper(II)-complexed chitosan were investigated. Separations of gallium and indium from zinc, ferric iron and aluminum from zinc, and nickel from cobalt were possible with high selectivity by this resin. Some applications to hydrometallurgical processes are also proposed.

Equilibrium studies of the sorption of Hg(II) ions onto chitosan

“…One of the applications of chitosan and its derivatives is for separation of heavy metal ions. Adsorption of Uranyl ions [7], Ni 2+ [8], Vanadium ions [9], Cr ions [10], Cd ions [11], Cu(II) ions [8,10,12,13,15], and heavy metals [14,16] on chitosan with different sources have been studied and also adsorption of metal ions on chitosan derivatives such as cross linked chitosan [17], polyaminated highly porous chitosan [18], chitosan beads [19,20], composite chitosan [21] and new chitosan derivatives [22][23][24] were investigated. These studies show that chitosan and its derivatives can be used as a adsorbent, since its amino and hydroxyl groups can act as chelating sites.…”

Determination of Uric Acid and Norepinephrine by Chitosan‐Multiwall Carbon Nanotube Modified Electrode

“…Chitosan, which is derived from chitin (a naturally occurring polysaccharide found in insects, arthropods and crustaceans) by de-acetylation, has excellent biologic compatibility, and has been extensively used as modifier due to its amino groups and hydroxy groups [7 -10], it can effectively adsorb various organics such as humic acid, proteins, o-phthalic acid [11,12]. Besides, chitosan is a natural polymer, using it as a dispersant is the requirement of environmental protection.…”

Molecular imprinting science and technology: a survey of the literature for the years up to and including 2003

“…681 Metal ion templates have also been imprinted through dibromide-mediated cross-linking of poly(vinylpyridines) 511,512 or by the treatment of metal-complexes of a copolymer of acrylic acid and diethyl 4-vinylphosphonate, 515-517,682-685 poly-4-vinylpyridine 514,686,687 or other polymers 688-690 with methylene-bisacrylamide. The same group has also used oxirane-based cross-linking reagents in metal ion imprinting.520,521 Other pre-polymer approaches have involved cross-linking a vinyl-substituted polymer with conventional cross-linkers in the presence of ( À )-cinchonidine, 691 the cross-linking of chitosan and chitosan derivatives in the presence of metal ions, 518,692,693 or the cross-linking of a template-complex of acryloylamylose. 694,695 Earlier work by Wulff and Kubik had shown that inclusion complexes of organic compounds with native amylose could be stabilized by cross-linking of the polysaccharide, with the binding properties of the product being dependent on the guest molecule that had been imprinted.…”