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Title: Fabrication and characterization of forward osmosis hollow fiber membranes with antifouling NF-like selective layer
Authors: Setiawan, Laurentia
Wang, Rong
Li, Kang
Fane, Anthony Gordon
Keywords: DRNTU::Engineering::Civil engineering::Water resources
Issue Date: 2012
Source: Setiawan, L., Wang, R., Li, K., & Fane, A. G. (2012). Fabrication and characterization of forward osmosis hollow fiber membranes with antifouling NF-like selective layer. Journal of Membrane Science, (394-395), 80-88.
Series/Report no.: Journal of membrane science
Abstract: A new type of forward osmosis (FO) hollow fiber membranes with an antifouling nanofiltration (NF)-like selective layer has been developed in this work. The fabrication involves a step of porous poly(amide-imide) (PAI) ultrafiltration (UF) hollow fiber spinning via phase inversion, followed by simple polyelectrolyte post-treatments using positively charged polyethyleneimine (PEI) for cross-linking and negatively charged polystyrene sulfonate sodium salt (PSS) for deposition. The membranes are subsequently characterized by a series of standard protocols and evaluated in FO process. The PAI FO membranes possess a pure water permeability of 3.7–4.3 L m−2 h−1 bar−1 and Na2SO4 rejections up to 85% at 1 bar. In the FO process, the membranes can achieve water flux of 17 and 12 L m−2 h−1 for active layer facing draw solution (AL-facing-DS) and active layer facing feed water (AL-facing-FW) configurations, respectively, using a 2000 ppm Na2SO4 aqueous solution as the feed and 0.5 M Na2SO4 as the draw solution. When the feed contained 1000 ppm bovine serum albumin (BSA) and 2000 ppm Na2SO4, a steady water flux of 11 L m−2 h−1 can be maintained using 0.5 M Na2SO4 as the draw solution at ambient temperature of 23 °C. The approach of making FO membranes developed in the present study offers the advantages of simple fabrication process, tailorable selective layer and promising membrane performance for protein-contained wastewater treatment by FO process.
DOI: 10.1016/j.memsci.2011.12.026
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