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1615765 
Journal Article 
Study of sodium alginate/polysulfone composite nanofiltration membrane 
Chen, X; Gao, X; Wang, W; Wang, Duo; Gao, C 
2010 
Yes 
Desalination and Water Treatment
ISSN: 1944-3994
EISSN: 1944-3986 
18 
1-3 
198-205 
WOS:000281515200024 
A novel composite nanofiltration (NF) membrane was prepared by over-coating the polysulfone ultrafiltration membrane with an alginate thin layer. The effects of the membrane preparation techniques and operating conditions on the rejection performance of the composite membranes were studied. The structure of the composite NF membrane was characterized by scanning electron microscopy and infrared spectroscopy. The results suggested that composite membrane with excellent performances was prepared while the concentration of sodium alginate was 2%, the concentration of glutaraldehyde was 0.9%, and the cross-linking time was 4 h at 30 C. Characterization suggested: The salt rejections to Na2SO4, MgSO4, NaCl and MgCl2 (1000 mg.L-1) were 87.2%, 21.5%, 32.0%, 12.2%, respectively. And the permeation fluxes were 30.6 L.h(-1).m(-2), 35.2 L. h(-1).m(-2), 33.5 L.h(-1).m(-2), 22.4 L.h(-1).m(-2), respectively. In addition, the curve about the streaming potential illustrated the negatively charged characteristics of this membrane, with a pressure osmobic coefficient of 32.971 mV.MPa-1. 
Composite nanofiltration membrane; Sodium alginate; Polysulfone ultrafiltration membrane; salt rejection