Mesoporous aluminosilicate glasses: Potential materials for dye removal from wastewater effluents

Autor(es)

Almeida, Flavio P. ; Botelho, Moema B. S. ; Doerenkamp, Carsten ; Kessler, Elizaveta ; Ferrari, Cynthia R. ; Eckert, Hellmut ; de Camargo, Andrea S. S.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Solid State Chemistry; v. 253, p. 406-413, SEP 2017.
• Citações Web of Science: 6

Resumo

Mesoporous amorphous sodium-aluminosilicate host matrices of composition Si1-xAlxNaxO2, 0.1 <= x <= 0.33, obtained by sol-gel methodology, have been used as sequestrating agents for the cationic dye Rhodamine 6 G (Rh6G) in solution. Favorable adsorption kinetics and a wide pH working range (4-10) as well as high sorption capacities for Rh6G render these materials potentially useful reagents for effective dye removal from wastewaters. While the experimentally realized sorption capacities fall significantly below the theoretical limits, used materials can be thermally re-cycled by pyrolizing the sequestrated dye molecules. Solid state NMR and BET measurements show that this process occurs under preservation of the materials' structural integrity, allowing it to be re-used multiple times. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs