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Characterization of mullite ceramic membranes and their application in the removal escherichia coli

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Characterization of mullite ceramic membranes and their application in the removal escherichia coli

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Título Characterization of mullite ceramic membranes and their application in the removal escherichia coli
Autor Biron, Dionisio da Silva
Bortoluz, Jordana
Andrade, Mára Zeni
Bergmann, Carlos Perez
Santos, Venina dos
Abstract 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. coli resulted 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.
Contido em Materials research : ibero-american journal of materials. São Carlos, SP. Vol. 19, no. 3 (May/June 2016), p. 513-519
Assunto Membranas cerâmicas
Microfiltração
Separação por membranas
[en] Ceramic membranes
[en] Characterization
[en] Microfiltration
[en] Retention
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/143929
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