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In relation to this article, we declare that there is no conflict of interest.
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Received March 18, 2021
Accepted June 27, 2021
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Optimization of UV-photografting factors in preparation of polyacrylic-polyethersulfone forward osmosis membrane using response surface methodology

1Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia 2Earth Resources and Sustainability (ERAS) Center, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia 3Department of Structure of Matter, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Av. Complutense s/n, 28040, Madrid, Spain 4Madrid Institute for Advanced Studies of Water (IMDEA Water Institute), Calle Punto Net No 4 28805, Alcalá de Henares, Madrid (Spain)
Korean Journal of Chemical Engineering, November 2021, 38(11), 2313-2323(11), 10.1007/s11814-021-0881-6
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Abstract

Commercial nanofiltration polyethersulfone (NF2) membrane was modified via ultraviolet (UV) photografting to prepare a high-performance forward osmosis (FO) membrane. The optimized condition of grafting parameters was obtained using central composite design (CCD) and response surface methodology (RSM). UV-photografting time and acrylic acid (AA) monomer concentration were the considered variables, while the two RSM responses were water permeate flux and reverse salt diffusion flux (RSD). Quadratic models were established between the responses and the independent parameters using analysis of variance (ANOVA). The membranes were characterized with functional group, morphology and surface roughness. The obtained optimum conditions were 2.81min grafting time and 27.85 g/L AA monomer concentration. Under these conditions, a maximum water permeate flux of 1.52±0.04 L/m2·h was achieved with an RSD value of 10.09±0.36 g/m2·h. The optimized membrane exhibited a higher water flux compared to the unmodified NF2 membrane without any significant change of the RSD value.

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