Removal of bisphenol A by a nanofiltration membrane in view of drinking water production

[摘要] The efficiency with which a nanofiltration membrane (Desal 5 DK) removes bisphenol A (BPA) was investigated, together with the mechanisms involved. Whereas high retention (> 90%) was obtained at the beginning of the filtration, the observed retention coefficient (Robs) decreased to around 50% when the membrane became saturated, due to adsorption of BPA onto the membrane structure. The presence of ions (Na+, Cl-) affects the R-obs, this effect being attributed to a change in BPA hydrodynamic radius. Moreover, in our operating conditions, the presence of natural organic matter (1 mg/L) in the feed solution does not lead to variation in BPA retention at steady state. (c) 2006 Elsevier Ltd. All rights reserved.

[发布日期] 2006-12-01

[关键词] nanofiltration;membrane;endocrine disrupters;bisphenol A;retention mechanism;adsorption