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An investigation of cadmium(II) and nickel(II) adsorption by chitin graft copolymer
Author(s) -
Filho José A. R.,
Bach Erna E.,
Vargas Reinaldo R.,
Soares Demétrio A. W.,
de Queiroz Alvaro A. A.
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20114
Subject(s) - copolymer , aqueous solution , adsorption , grafting , nickel , polymer chemistry , chitin , biopolymer , self healing hydrogels , nuclear chemistry , sorption , hydrogen peroxide , cadmium , chemistry , fourier transform infrared spectroscopy , chitosan , chelation , materials science , polymer , inorganic chemistry , chemical engineering , organic chemistry , engineering
Chitin hydrogels of poly(vinylpyrrolidone) (VP) were prepared by means of the hydrogen peroxide graft copolymerization process. The effect of the VP grafted chain on water diffusion through the biopolymer was studied. Fourier transform infrared spectra of the VP‐g‐Ch showed an increase in the intensities of the hydroxyl and carbonyl stretching bands indicating a reduction in the hydrogen bonding of chitin. An investigation was undertaken regarding the adsorption of nickel(II) and cadmium(II) ions from aqueous solutions by the VP grafted chitin and the effects of the grafting degree on the Cd 2+ and Ni 2+ sorption were studied. The Cd 2+ and Ni 2+ adsorption equilibrium data correlate well with the Freündlich equation. The results indicate that the Ch‐g‐VP graft copolymer under investigation is a potentially powerful chelating material that can be employed for Ni 2+ and Cd 2+ ion removal from wastewater effluents. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1310–1318, 2004