Tailored ethylenediamine-functionalized graphene oxide membrane on kaolin hollow fibers for pectin concentration.

Autor: Magalhães FS; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121, 38400-902 Uberlândia, Minas Gerais, Brazil., Ribeiro SRFL; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121, 38400-902 Uberlândia, Minas Gerais, Brazil., Dos Santos SS; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121, 38400-902 Uberlândia, Minas Gerais, Brazil., Boffito DC; Department of Chemical Engineering, Polytechnique Montreal, C.P. 6079, Succ., CV Montréal, H3C 3A7, Québec, Canada., Cardoso VL; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121, 38400-902 Uberlândia, Minas Gerais, Brazil., Reis MHM; Faculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila, 2121, 38400-902 Uberlândia, Minas Gerais, Brazil. Electronic address: miria@ufu.br.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Jan; Vol. 254 (Pt 3), pp. 127896. Date of Electronic Publication: 2023 Nov 04.
DOI: 10.1016/j.ijbiomac.2023.127896
Abstrakt: Pectin is a valuable product that can be extracted from waste fruit peels. Here we propose the use of graphene oxide (GO)-based membranes for pectin concentration. The synthesized GO was functionalized with ethylenediamine (EDA) to molecularly design the GO framework. Kaolin hollow fibers with asymmetric pore distribution were used as a porous substrate for GO/EDA deposition. A GO/EDA layer with a thickness of 2.86 ± 0.24 μm was assembled on the substrate by the simple vacuum-assisted deposition method. After GO/EDA depositions, the water permeance of the pristine kaolin hollow fibers reduced from 8.46 ± 0.17 to 0.52 ± 0.03 L h -1 ·m -2 ·kPa -1 . A pectin aqueous extract from orange peels was filtered at cross-flow mode through the prepared membranes and the steady-state fluxes through pristine and GO/EDA-coated hollow fibers were 56 ± 2 and 20 ± 3 L h -1  m -2 , respectively. The GO/EDA-coated membrane presented greater pectin selectivity than the pristine hollow fiber. The GO/EDA-coated hollow fiber concentrated the galacturonic acid, phenolic, and methoxyl contents in 19.5, 17.4, and 29.2 %, respectively. Thus, filtration through the GO/EDA-based membrane is a suitable alternative for pectin concentration.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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