Characterization of Nanofiltration Membrane Using Microscopic Methods

A pressure-driven membrane process such as nanofiltration (NF) has become the main component of advanced water reuse and desalination systems throughout the worldThe results obtained shows that the determination of the membrane roughness depends on the observation scale. The roughness parameters of the membranes decrease with increase in observation scale. The RMS roughness, peak height, skewness and kurtosis for 1.0µm×1.0µm scan size were higher than 5.0µm×5.0µm scan size. NF11 membrane had the highest RMS roughness (846.263), highest peak height (4157.68), highest skewness (0.1267) and kurtosis (3.75) at 1.0µm×1.0µm scan size while NF than NF12 had the lowest (refer in Table 2). The results clearly show that NF11 had the roughest surface than NF12 since it had the highest roughness even for 5.0µm×5.0µm scan size. As per the results in the literature, the membrane with the highest roughness (NF11) will perform better in waste water treatment.