(348o) Diffuse Membrane Via Pyrolysis of a Coating of Fish Scale Colloids for Organic Solvent Nanofiltration

This study utilizes nano grains of Barramundi fish scales (BFS) to construct a filtration membrane, which manifests organic solvent nanofiltration efficacy through the self-sustained percolation mechanism, i.e. adsorption of solute promotes retention of solute. A coating of BFS colloids is first developed on cellulose filtration paper. The coating sheet is then subjected to partial pyrolysis under slight compression to attain the filtration membrane. The membrane demonstrates > 90% retention for the Sudan IV and > 95% retention for rose bengal in isopropanol solution (30 ppm) with the average permeance (LMBH) of 1.9 and 6.1, respectively. It is also noticeable that when using tetracycline to examine the membrane, the initial negative rejection (-50%) followed by rejection (>70%) of this probe solute with an average permeance of 4.3. This phenomenon suggests that the concentration polarization triggers rejection via restricting surface diffusion and adsorption known as the dynamic separation way.