Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2769
Título: Assessment of saccharide fractionation by ultrafiltration and nanofiltration
Autor: Catarino, Isabel
Minhalma, Miguel
Beal, Lademir L.
Mateus, Marília
Pinho, Maria Norberta de
Palavras-chave: Nanofiltration
Saccharides fractionation
Cellulose-Acetate Membranes
Reverse-Osmosis Separation
Data: 1-Abr-2008
Editora: Elsevier Science BV
Citação: CATARINO, Isabel; MINHALMA, Miguel; BEAL, Lademir L.; MATEUS, Marilia; PINHO, Maria Norberta de - Assessment of saccharide fractionation by ultrafiltration and nanofiltration. Journal of Membrane Science. ISSN 0376-7388. Vol. 312, nr 1-2 (2008), p. 34-40.
Resumo: This paper addresses the investigation of the fractionation of saccharide mixtures and saccharide mixtures with calcium using ultrafiltration (UF) and nanofiltration (NF). A set of cellulose acetate membranes covered a wide range of molecular weight cut-off (MWCO) ranging from 250 to 46,000 Da and the total feed concentration of saccharides mixtures varied from 1550 to 4700 ppm with the ratio of the two saccharides-solutes (glucose to raffinose) being kept constant at the value of 1.8. The evolution pattern of the saccharide concentration ratio in the UF/NF permeate streams displayed a dependence on the membrane MWCO, on the total sugar concentration and on the presence of calcium ions. For the highest total sugar content, the membranes with MWCO from 2000 to 7000 Da showed saccharide fractionation capability that was enhanced in the presence of calcium. The Steric Pore Flow Model was used to predict individual solute permeation behaviours and to assess the deviations to steric hindered transport of the solutes in multi-component saccharide solutions. (C) 2008 Elsevier B.V. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2769
ISSN: 0376-7388
Aparece nas colecções:ISEL - Eng. Quim. Biol. - Artigos

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