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- W3008333421 abstract "Abstract Here we discuss how the position of carboxyalkyl substitute and the type of the cross-linking agent affect properties of chitosan-based metal-affine sorbents. Using fluoroquinolone (ciprofloxacin) as a model compound we have shown that metal-chelates of N- and N,O-carboxyalkyl chitosan derivatives cross-linked with hexamethylene diisocyanate and epichlorohydrin differ in sorption properties. Despite high (>90%) efficacy of ciprofloxacin recovery by Cu(II)- and Al(III)-chelates of N- and N,O-carboxyalkylchitosans from water, the latter were much sensitive to the increase of ionic strength and the presence of Ca2+ ions. The difference in the structure of Cu(II) complexes depending on the type of carboxyalkyl substitution was revealed by electron spin resonance (ESR) spectroscopy. Analysis of the metal ions release during ciprofloxacin sorption have shown that Cu(II)- and Al(III)-chelates of N,O-carboxyalkylchitosan were less stable and less efficient as metal-affine sorbents for ciprofloxacin than N-regioselectively substituted carboxyethylchitosan, which showed properties comparable to those of Cu(II)-chelates of commercial imido-diacetic acid (IDA)-agarose." @default.
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- W3008333421 date "2020-05-01" @default.
- W3008333421 modified "2023-09-30" @default.
- W3008333421 title "Effect of regioselectivity of chitosan carboxyalkylation and type of cross-linking on the metal-chelate sorption properties toward ciprofloxacin" @default.
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- W3008333421 doi "https://doi.org/10.1016/j.reactfunctpolym.2020.104536" @default.
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