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- Title
Improving Water Permeability of Hydrophilic PVDF Membrane Prepared via Blending with Organic and Inorganic Additives for Humic Acid Separation.
- Authors
Arahman, Nasrul; Mulyati, Sri; Fahrina, Afrillia; Muchtar, Syawaliah; Yusuf, Mukramah; Takagi, Ryosuke; Matsuyama, Hideto; Nordin, Nik Abdul Hadi; Bilad, Muhammad Roil; Wu, Ming-Chung
- Abstract
The removal of impurities from water or wastewater by the membrane filtration process has become more reliable due to good hydraulic performance and high permeate quality. The filterability of the membrane can be improved by having a material with a specific pore structure and good hydrophilic properties. This work aims at preparing a polyvinylidene fluoride (PVDF) membrane incorporated with phospholipid in the form of a 2-methacryloyloxyethyl phosphorylcholine, polymeric additive in the form of polyvinylpyrrolidone, and its combination with inorganic nanosilica from a renewable source derived from bagasse. The resulting membrane morphologies were analyzed by using scanning electron microscopy. Furthermore, atomic force microscopy was performed to analyze the membrane surface roughness. The chemical compositions of the resulting membranes were identified using Fourier transform infrared. A lab-scale cross-flow filtration system module was used to evaluate the membrane's hydraulic and separation performance by the filtration of humic acid (HA) solution as the model contaminant. Results showed that the additives improved the membrane surface hydrophilicity. All modified membranes also showed up to five times higher water permeability than the pristine PVDF, thanks to the improved structure. Additionally, all membrane samples showed HA rejections of 75–90%.
- Subjects
POLYVINYLIDENE fluoride; HUMIC acid; WATER filtration; PERMEABILITY; ATOMIC force microscopy; SCANNING electron microscopy; MEMBRANE separation
- Publication
Molecules, 2019, Vol 24, Issue 22, p4099
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules24224099