Determination Of The Constants Of Affinity Of Fecl3, Cucl2, And Zncl2 For A Nitrogen-containing Organosilane Bonded On Al2o3-cellulose Acetate Hybrid Material Surface From Ethanol Solution.

dc.creatorLazarin, Angélica M
dc.creatorLanders, Richard
dc.creatorKholin, Yuriy V
dc.creatorGushikem, Yoshitaka
dc.date2002-Oct
dc.date2015-11-27T12:49:29Z
dc.date2015-11-27T12:49:29Z
dc.date.accessioned2018-03-29T00:56:55Z
dc.date.available2018-03-29T00:56:55Z
dc.identifierJournal Of Colloid And Interface Science. v. 254, n. 1, p. 31-8, 2002-Oct.
dc.identifier0021-9797
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/12702422
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/195250
dc.identifier12702422
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1295483
dc.descriptionThis work describes the preparation and characterization of a cellulose acetate fiber coated with Al(2)O(3), resulting in the organic-inorganic hybrid Cel/Al(2)O(3). Furthermore, the hybrid was modified by attaching organofunctional groups by reaction with the precursor reagents (RO)(3)Si(CH(2))(3)L (L=NH(2), NH(CH(2))(2)NH(2), NH(CH(2))(2)NH(CH(2))(2)NH(2), and N(2)C(3)H(3) (imidazole)), resulting in Cel/Al(2)O(3)/Si(CH(2))(3)NH(2) (1), Cel/Al(2)O(3)/Si(CH(2))(3)NH(CH(2))(2)NH(2) (2), Cel/Al(2)O(3)/Si(CH(2))(3)NH(CH(2))(2)NH(CH(2))(2)NH(2) (3), and Cel/Al(2)O(3)/Si(CH(2))(3)N(2)C(3)H(3) (4). The amounts of attached organofunctional groups were (in mmol per gram of the material) 1=1.90, 2=1.89, 3=1.66, and 4=1.35. The isotherms of adsorption of FeCl(3), CuCl(2), and ZnCl(2) by Cel/Al(2)O(3)/Si(CH(2))(3)L from ethanol solutions were obtained at 298 K. Accurate estimates of the specific sorption capacities and the heteregeneous stability constants of the immobilized metal complexes were determined with the aid of several computational procedures. It is shown that the sorptional capacities are much less than the concentrations of the attached organofunctional groups. As all sorption isotherms are fitted properly with the Langmuir isotherm equation, the effects of the energetic heterogeneity and the lateral interactions do not affect the chemisorption equilibria. The heterogeneous stability constants of the immobilized complexes are fairly high, which provides efficient removal of the metal ions from solutions by the hybrid materials.
dc.description254
dc.description31-8
dc.languageeng
dc.relationJournal Of Colloid And Interface Science
dc.relationJ Colloid Interface Sci
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAdsorption
dc.subjectAluminum Compounds
dc.subjectCellulose
dc.subjectChlorides
dc.subjectEthanol
dc.subjectFerric Compounds
dc.subjectNitrogen
dc.subjectOrganosilicon Compounds
dc.subjectSolutions
dc.subjectSpectrum Analysis
dc.subjectZinc Compounds
dc.titleDetermination Of The Constants Of Affinity Of Fecl3, Cucl2, And Zncl2 For A Nitrogen-containing Organosilane Bonded On Al2o3-cellulose Acetate Hybrid Material Surface From Ethanol Solution.
dc.typeArtículos de revistas


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