Effect of the degree of cross-linking of N-2-sulfoethylchitosan on the sorption selectivity of copper(II) and silver(I)

Abstract

Sorption materials based on N-2-sulfoethylchitosan (SECH) with various degrees of cross-linking by glutaric aldehyde were synthesized. The composition and structure of the materials were characterized by elemental analysis and IR Fourier spectroscopy. The selectivity coeffi cients K Ag/Cu were determined for sorbents with a degree of substitution equal to 0.5. It was shown that the sorption selectivity of silver(I) grows with increasing degree of SECH cross-linking, compared with copper(II) in an ammonia-acetate buffer solution.

2-Mercaptobenzimidazole derivative of chitosan for silver sorption – Contribution of magnetite incorporation and sonication effects on enhanced metal recovery

“…Chitosan-based materials offer interesting perspectives for chemical modification and synthesis of functionalized materials because of the presence of highly reactive groups (-OH, amine groups) [27][28][29][30][31]. In addition, chitosan can be also readily conditioned as magnetic composite for readily separation of micro-and nanoparticles from aqueous solutions.…”