[Removal of bisphenol A and tetrabromobisphenol A membrane by nanofiltration from water source].

The removal efficiency of BPA and TBBPA by nanofiltration membrane Desal 5 DK has been investigated with a lab-scale dead-end filtration module and the role of adsorption of two molecules on membrane was also explored to understand the filtration mechanism. The results showed that the R(obs) of BPA decreased from 89% to 47% as the accumulated adsorption quantity of BPA onto the membrane increased to 30 microg x m(-2). The high BPA concentration in adsorption layer caused the water flux decline especially at high pressure.