Preparation and Evaluation of PVDF/CA Blend Membranes for Waste water Treatment
Paper ID : 1401-MST2015-FULL
Authors:
Fatemeh Rekabdar *1, Mohammad Hossein Razaghi2, Maryam Tavakolmoghadam3, Homayoon Hossein khanli1
1Research institute of petroleum industry
2sharif university
3Research Institute of Petroleum Industry and Iran university of science and technology
Abstract:
Polymeric membranes were prepared from blends of Poly (vinylidene fluoride) (PVDF)/Cellulose acetate (CA) via phase inversion method induced by immersion precipitation. N,N-dimethylacetamide (DMAc) and water were used as solvent and coagulant (non-solvent), respectively. The effects of blend ratio on permeation, morphology, pore size and anti-fouling property of PVDF/CA membranes, were investigated. Different techniques such as SEM, EDX, contact angle goniometry, mechanical tensile strength and filtration experiments of water and BSA were applied to evaluate the morphology and performance of membranes. The PVDF/CA membranes exhibited superior hydrophilicity compared to the neat membranes. However, the contact angle stopped decreasing when the CA/PVDF blend ratio was over 20 wt. %. Similar trend was noticed for the permeation flux of the membranes which can be interpreted due to porosity and morphology changes. Membranes mean pore size calculated filtration velocity method. All prepared membranes have a good removal COD, TSS and turbidity in sewage wastewater treatment test. The blend membrane with a CA/PVDF ratio of 20/80 showed the highest pure water flux and lowest total fouling ratio and selected as the optimum blend membrane.
Keywords:
Blend membrane, Polyvinylidene fluoride, Cellulose acetate, Phase inversion method, Blend ratio, Sewage wastewater separation
Status : Paper Accepted (Poster Presentation)