Optimized Porous Anodic Alumina Membranes for Water Ultrafiltration of Pathogenic Bacteria (E. coli)

Autor(es)

Zimer, Alexsandro Mendes ; Machado, Maria Manuela P. ; Dalla Costa Junior, Lazaro Jose ; Leme Ike, Priscila Tomie ; Iemma, Monica R. C. ; Yamamoto, Cintia Fumi ; Ferreira, Caue Favero ; Souza, Dulce H. F. ; de Oliveira, Caue Ribeiro ; Pereira, Ernesto Chaves

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 16, n. 6, p. 6526-6534, JUN 2016.
• Citações Web of Science: 2

Resumo

In this paper, we present the optimization of porous anodic alumina membranes for ultrafiltration prepared by anodically oxidized aluminum foils. The membranes were characterized by field-emission scanning electron microscopy to measure the pore diameter and the membrane thicknesses. The liquid fluxes were estimated through gas permeabilitymeasurements using Darcy's and Forchheimer's equations. A 2(3) factorial design we used to optimize the membrane properties: pore diameter, membrane thickness, and liquid flux using as control variables the applied current density, solution composition and concentration. It was observed that the most import variables to control the pore diameter were current density and electrolyte composition. After the anodization both, metallic aluminum substrate and the barrier layer of alumina were removed using adequate solutions to obtain the free standing membrane. Then, Escherichia coli a common bacterial contamination of drinking water was removed using these PAA membranes with 100% of efficiency to obtain bacteria-free water. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 11/19430-0 - Investigação in situ da corrosão do aço carbono por meio de series temporais de imagens acoplada a técnicas eletroquímicas
• Beneficiário: Alexsandro Mendes Zimer
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado