Keshinanta Dyah Ayu Maharani, Nita Kusumawati
In general, this research aims to study membrane preparation process which are capable to form asymmetry structures on the polysulfone membrane, resulting in increased permeability and selectivity. More specific, this study aims to determine the effect of casting solution and non-solvent composition on the formation of asymmetry structure, mechanical strength and membrane performance in the separation of chromium (VI). In this research, H2O and CH3OH are chosen as non-solvent solution which is used to induce phase inversion. To determine the effect of casting solution and non-solvent composition on membrane performance, casting solution composition was varied in the range of PSF/NMP/PEG400 (% w/w) 12/84 /4-16/84/0, and the non-solvent composition was varied in the range H2O/CH3OH (%v/v) 100/0, 75/25, 50/50. Permeability (flux) measurement result of PSf membrane using Dead end membrane reactor showed that the range of flux was 8060.39 L/m2.h-468.78 L/m2.h. Membrane with the smallest PSf composition on the casting solution and the biggest H2O composition on the non-solvent has the largest flux and smallest selectivity (rejection percentage). From the results of selectivity (rejection percentage) measurement against chromium (VI), which performed by UV-Vis Spectrophotometer, shows the range of 12.61%-49.19%. Meanwhile, mechanical strength measurement results for the membrane with the smallest composition of PSf and biggest H2O is 2458.89 N/m2, and for the biggest composition of the PSf with the smallest composition of H2O is 3427.06 N/m2. Generally, in this research, polysulfone membrane having obtained the high mechanical strength and performance.
Department of Chemistry, Universitas Negeri Surabaya, Surabaya, Indonesia
