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Adsorptive removal of as(III) from aqueous solution by zr(IV)-loaded collagen fiber / Xin Huang in Industrial & engineering chemistry research, Vol. 47 n°15 (Août 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5623-5628 Titre : Adsorptive removal of as(III) from aqueous solution by zr(IV)-loaded collagen fiber Type de document : texte imprimé Auteurs : Xin Huang, Auteur ; Limin Jiao, Auteur ; Xuepin Liao, Auteur Année de publication : 2008 Article en page(s) : p. 5623-5628 Note générale : Bibliogr. p. 5627-5628 Langues : Anglais (eng) Mots-clés : Arsenite  (III);  ZrCF;  Adsorption Résumé : Compared with arsenate [As(V)], arsenite [As(III)] is more toxic to human health and more difficult to be removed from aqueous solution. In this study, a novel adsorbent, Zr(IV)-loaded collagen fiber (ZrCF), was prepared, and its adsorption characteristics to As(III) were investigated. It was found that ZrCF can effectively remove As(III) from aqueous solution in the pH range of 9.0-12.0. The maximum adsorption capacity of As(III) by ZrCF reached up to 54.02 mg As/g when the initial concentration of As(III) was 73.00 mg/L at 303 K and pH 11.0. The adsorption isotherms of ZrCF to As(III) were well fitted by the Langmuir-Freundlich equation. The adsorption kinetic experimental data were well described by the pseudo-second-order rate equation, and the calculated adsorption capacities were close to those obtained by experiments. The leakage of zirconium loaded on ZrCF was negligible during adsorption process. Therefore, this study indicates that ZrCF is a promising adsorbent for As(III) removal from aqueous solution. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071608k [article] Adsorptive removal of as(III) from aqueous solution by zr(IV)-loaded collagen fiber [texte imprimé] / Xin Huang, Auteur ; Limin Jiao, Auteur ; Xuepin Liao, Auteur . - 2008 . - p. 5623-5628. Bibliogr. p. 5627-5628 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5623-5628 Mots-clés : Arsenite  (III);  ZrCF;  Adsorption Résumé : Compared with arsenate [As(V)], arsenite [As(III)] is more toxic to human health and more difficult to be removed from aqueous solution. In this study, a novel adsorbent, Zr(IV)-loaded collagen fiber (ZrCF), was prepared, and its adsorption characteristics to As(III) were investigated. It was found that ZrCF can effectively remove As(III) from aqueous solution in the pH range of 9.0-12.0. The maximum adsorption capacity of As(III) by ZrCF reached up to 54.02 mg As/g when the initial concentration of As(III) was 73.00 mg/L at 303 K and pH 11.0. The adsorption isotherms of ZrCF to As(III) were well fitted by the Langmuir-Freundlich equation. The adsorption kinetic experimental data were well described by the pseudo-second-order rate equation, and the calculated adsorption capacities were close to those obtained by experiments. The leakage of zirconium loaded on ZrCF was negligible during adsorption process. Therefore, this study indicates that ZrCF is a promising adsorbent for As(III) removal from aqueous solution. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071608k

Using collagen fiber as a template to synthesize TiO2 and Fex/TiO2 nanofibers and their catalytic behaviors on the visible light-assisted degradation of orange II / Li Cai in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3194–3199 Titre : Using collagen fiber as a template to synthesize TiO2 and Fex/TiO2 nanofibers and their catalytic behaviors on the visible light-assisted degradation of orange II Type de document : texte imprimé Auteurs : Li Cai, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur Année de publication : 2010 Article en page(s) : pp. 3194–3199 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Collagen  Fiber  Template  Nanofibers  Catalytic  Behaviors  Assisted  Degradation  Orange  II  Visible  Light  TiO2  Fex/TiO2 Résumé : TiO2 and Fex/TiO2 nanofibers were prepared using collagen fiber as the template and Ti(SO4)2 as the titanium source, on which titanium (Ti4+) or titanium (Ti4+)/iron (Fe3+) were loaded, respectively, and then heat-treated. The structure and physical properties of these nanofibers were characterized by means of scanning electron microscopy, field emission scanning electron microscopy, X-ray diffraction, specific surface analyzer, and UV−vis absorption spectra. It was found that iron ions may substitute for some lattice titanium atoms and form a Ti−O−Fe structure. The TiO2 and Fex/TiO2 nanofibers were all anatase phase when sintered at 600 °C for 4 h. The N2 adsorption−desorption isotherms of TiO2 and Fex/TiO2 nanofibers were the typical type IV, which associated with the characteristics of mesoporous materials. Compared with Degussa P25, the absorbance wavelength of obtained TiO2 and Fex/TiO2 nanofibers was red shift and the band gap energy was decreased. The obtained TiO2 and Fex/TiO2 nanofibers exhibited excellent visible light catalytic activity for degradation of orange II. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901520t [article] Using collagen fiber as a template to synthesize TiO2 and Fex/TiO2 nanofibers and their catalytic behaviors on the visible light-assisted degradation of orange II [texte imprimé] / Li Cai, Auteur ; Xuepin Liao, Auteur ; Bi Shi, Auteur . - 2010 . - pp. 3194–3199. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3194–3199 Mots-clés : Collagen  Fiber  Template  Nanofibers  Catalytic  Behaviors  Assisted  Degradation  Orange  II  Visible  Light  TiO2  Fex/TiO2 Résumé : TiO2 and Fex/TiO2 nanofibers were prepared using collagen fiber as the template and Ti(SO4)2 as the titanium source, on which titanium (Ti4+) or titanium (Ti4+)/iron (Fe3+) were loaded, respectively, and then heat-treated. The structure and physical properties of these nanofibers were characterized by means of scanning electron microscopy, field emission scanning electron microscopy, X-ray diffraction, specific surface analyzer, and UV−vis absorption spectra. It was found that iron ions may substitute for some lattice titanium atoms and form a Ti−O−Fe structure. The TiO2 and Fex/TiO2 nanofibers were all anatase phase when sintered at 600 °C for 4 h. The N2 adsorption−desorption isotherms of TiO2 and Fex/TiO2 nanofibers were the typical type IV, which associated with the characteristics of mesoporous materials. Compared with Degussa P25, the absorbance wavelength of obtained TiO2 and Fex/TiO2 nanofibers was red shift and the band gap energy was decreased. The obtained TiO2 and Fex/TiO2 nanofibers exhibited excellent visible light catalytic activity for degradation of orange II. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901520t