The effect of various conditions on the ultrafiltration process of bisphenol A using nanocomposite membranes modified with carbon nanotubes

This study presents effect of various conditions on BPA retention during ultrafiltration process. Polyethersulphone was selected as material for membrane preparation, while membranes were prepared with inverse phase method. Single-walled carbon nanotubes functionalized with carboxyl groups were employed for membrane modification. Tests were carried out for one substance - BPA, with use of three differently types of membranes. Presence of carbon nanotubes influences on membrane properties, like porosity, or contact angle of membranes. It was also found that retention of BPA was depended on its concentration, and also pH of the solution.