Kinetic studies on Cr(III)-binding behavior of collagen fiber functionalized by amino- and carboxyl-terminated hyperbranched polyamide

Kinetic studies on Cr(III)-binding behavior of collagen fiber functionalized by amino- and... Two kinds of insoluble collagen fiber (CF) were prepared by grafting amino- and carboxyl-terminated hyperbranched polyamide into collagen fiber using the cross-linking and terminal groups modification methods: (1) grafting amino terminated hyperbranched polyamide to CF by glutaraldehyde, and (2) condensation of the resulting carboxyl with glyoxylic acid. Their structures were characterized by FT-IR, SEM-EDX, ion distribution, and XRD. Because of the condensation of glyoxylic acid, the adsorption peaks of carboxyl groups occurred at 1,740 cm−1 in the FTIR spectra. The adsorption capabilities of the products for Cr(III) were studied by batch experiments. The pseudo-first-order, pseudo-second-order, and intra-particle diffusion model equations were used for the kinetic studies. The results showed that the products exhibited better adsorption capabilities for Cr(III). The adsorption capability of carboxyl-terminated product was higher than that of amino-terminated one and this is attributed to the carboxylic functional groups in the carboxyl-terminated product, which are responsible for their cationic ion exchange phenomenon. It was also observed that kinetic data correspond very well to the pseudo-second-order equation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Kinetic studies on Cr(III)-binding behavior of collagen fiber functionalized by amino- and carboxyl-terminated hyperbranched polyamide

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Publisher
Springer Journals
Copyright
Copyright © 2014 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-014-1763-x
Publisher site
See Article on Publisher Site

Abstract

Two kinds of insoluble collagen fiber (CF) were prepared by grafting amino- and carboxyl-terminated hyperbranched polyamide into collagen fiber using the cross-linking and terminal groups modification methods: (1) grafting amino terminated hyperbranched polyamide to CF by glutaraldehyde, and (2) condensation of the resulting carboxyl with glyoxylic acid. Their structures were characterized by FT-IR, SEM-EDX, ion distribution, and XRD. Because of the condensation of glyoxylic acid, the adsorption peaks of carboxyl groups occurred at 1,740 cm−1 in the FTIR spectra. The adsorption capabilities of the products for Cr(III) were studied by batch experiments. The pseudo-first-order, pseudo-second-order, and intra-particle diffusion model equations were used for the kinetic studies. The results showed that the products exhibited better adsorption capabilities for Cr(III). The adsorption capability of carboxyl-terminated product was higher than that of amino-terminated one and this is attributed to the carboxylic functional groups in the carboxyl-terminated product, which are responsible for their cationic ion exchange phenomenon. It was also observed that kinetic data correspond very well to the pseudo-second-order equation.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jul 24, 2014

References

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