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- Title
Composite membranes with surface-modifying macromolecules for halogenated hydrocarbons removal from water in membrane extraction process.
- Authors
Nisola, G.M.; Beltran, A.B.; Park, M.J.; Torrejos, R.E.; Seo, J.G.; Lee, S.-P.; Chung, W.-J.
- Abstract
Flat sheet composite polysulfone (PSf) membranes blended with surface-modifying macromolecules (SMM) were prepared, characterized, and tested for halogenated hydrocarbons (HHC) (i.e. trichloroethylene, TCE) permeation and separation from water in an extractive membrane system. The fluorine end groups in SMMs facilitated its migration towards the membrane surface during membrane casting, whereas the polydimethylsiloxane component rendered the SMM organophilic which improved the surface affinity of the composite membrane towards TCE. Polydimethylsiloxane content in SMM, SMM content in PSf, and air-exposure of the casted blend solutions before membrane formation were found critical in obtaining an effective composite membrane. The presence of a selective SMM layer on the membrane surface was confirmed via contact angle measurement, Fourier-transform infrared spectrometry analysis, and field emission-scanning electron microscope. The most effective composite membrane (PSf with 15 wt% H-SMM and air exposed for 5 min before phase inversion) exhibited TCE flux values ranging between 640 and 1790 mg/m2 h when fed with TCE concentrations between 30 and 105 mg/L. Overall results demonstrate the potential use of the composite extractive membrane for the removal of hydrophobic organic contaminants like HHCs from aqueous streams.
- Subjects
COMPOSITE membranes (Chemistry); POLYMER research; MACROMOLECULES; HALOCARBONS; EXTRACTION (Chemistry); MEMBRANE filtration in water purification
- Publication
Desalination & Water Treatment, 2015, Vol 54, Issue 13, p3551
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.922314