Characterization of Mullite Ceramic Membranes and their Application in the Removal Escherichia Coli

AUTOR(ES)

Biron, Dionisio da Silva, Bortoluz, Jordana, Zeni, Mara, Bergmann, C. P., Santos, Venina dos

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

05/04/2016

RESUMO

This paper aims the morphological and structural characterization of ceramic membranes of mullite and their application in the removal of Escherichia coli. A complex irregular structure presented by the pores of the membrane was verified by scanning electron microscopy (SEM). The average pore size and distribution were determined by mercury intrusion porosimetry. The average pore size of the material presented was 0,39 µm. Microfiltration tests resulted in a protein retention of 46, 76 and 89% for trypsin (TR), egg albumin (EA) and bovine serum albumin (BSA), proving the efficiency of the membrane microfiltration tests for molecular weight of 69 kDa. The application of the membranes on the retention of gram-negative bacterium E. coliresulted in a 66% efficiency at a pressure of 200 kPa and a 98% efficiency when applied a pressure of 50 kPa. Therefore, the use of mullite membranes show limited efficiency towards bacteria retention. Nevertheless, they present fluxes similar to other materials proposed in the literature.

Documentos Relacionados

• Characterization and application of ceramic membranes prepared from Algerian kaolin
• Characterization of commercial ceramic adsorbents and its application on naphthenic acids removal of petroleum distillates
• Human beta 2-adrenergic receptors expressed in Escherichia coli membranes retain their pharmacological properties.
• Characterization of soybean choline kinase cDNAs and their expression in yeast and Escherichia coli.
• Formation and Ultrastructure of Extra Membranes in Escherichia coli