Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/16630
Título: | Chromium (VI) ion adsorption features of chitosan film and its chitosan/zeolite conjugate 13X film |
Autor(es): | Batista, Anabelle C. L. Villanueva, Emílio R. Amorim, Rosa Valéria S. Tavares, M. T. Takaki, G. M. Campos |
Palavras-chave: | Adsorption Chitosan Chromium Chiyosan/zeolites conjugates zeolite |
Data: | 2011 |
Editora: | MDPI |
Revista: | Molecules |
Resumo(s): | This research evaluated the importance of the adsorption properties of chitosan a chitosan/zeolite conjugate film for the removal of Cr(VI) ions from solutions in the 5–260 mg/L concentration range, when the pH was adjusted to 4.0 and 6.0. The uptake capacities of the films formed by chitosan and by the chitosan/zeolite conjugate were calculated by mass balance. The equilibrium isotherms were fitted to the Langmuir, Freundlich and Redlich-Peterson models. The chitosan film seems to be a good sorbent for Cr(VI) at pH 4, but its physical instability suggests the need for a more resilient support. Due to this fact zeolite was added to the chitosan matrix in solution and a chitosan/zeolite (CS/Zeo) film was thus formed. The solubility of the film and the characterization of the different matrices by FTIR, TGA and X-Ray showed that a cross-linked structure was formed between the chitosan and zeolite and the solubility of the film increased. In this study, the low manufacturing cost of the CS/Zeo matrix, the good uptake of Cr(VI) at acidic pH (17.28 mg/g) and the non desorption of Cr(VI) from the film in water suggests this combination should be tested in industrial environment. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/16630 |
DOI: | 10.3390/molecules16053569 |
ISSN: | 1420-3049 |
Versão da editora: | http://www.mdpi.com/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |