Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2012.06.013
Title: Positively charged nanofiltration (NF) membranes via UV grafting on sulfonated polyphenylenesulfone (sPPSU) for effective removal of textile dyes from wastewater
Authors: Zhong, P.S.
Widjojo, N.
Chung, T.-S. 
Weber, M.
Maletzko, C.
Keywords: Dye removal
Nanofiltration
Positively charged NF membrane
UV-initiated grafting
Issue Date: 1-Nov-2012
Citation: Zhong, P.S., Widjojo, N., Chung, T.-S., Weber, M., Maletzko, C. (2012-11-01). Positively charged nanofiltration (NF) membranes via UV grafting on sulfonated polyphenylenesulfone (sPPSU) for effective removal of textile dyes from wastewater. Journal of Membrane Science 417-418 : 52-60. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2012.06.013
Abstract: Novel positively charged nanofiltration (NF) membranes have been fabricated using sulfonated polyphenylenesulfone (sPPSU) support with hydrophilic properties and fully sponge-like morphology via UV-induced grafting. The resultant NF membranes with a mean effective pore diameter of 1.13-1.20nm, molecular weight cut off (MWCO) of 1627-1674Da and high pure water permeability (PWP) of 9-14LMHbar -1 can be successfully developed by utilizing two different types of positively charged grafting monomers. In view of salt rejections of the resultant NF membranes, it follows the order R(MgCl 2)>R(NaCl)>R(MgSO 4)>R(Na 2SO 4) with high rejections to MgCl 2 of up to 95.20%. Furthermore, the newly developed NF1 and NF2 membranes demonstrate an impressive prospect for the dye removal from wastewater treatment. Due to their positive surface charges, a superior rejection of up to 99.98% to Safranin O dye can be achieved by NF1 and NF2 membranes. Characterizations of the two NF membranes were further done to elucidate the difference in performance and a variety of factors such as pore size, surface roughness, selective layer thickness and zeta potential were established as the controlling factors. © 2012 Elsevier B.V.
Source Title: Journal of Membrane Science
URI: http://scholarbank.nus.edu.sg/handle/10635/89864
ISSN: 03767388
DOI: 10.1016/j.memsci.2012.06.013
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