Synergy Effects of Hydrodynamic Conditions and Surfactant on Sorption Behavior of Bisphenol A

Abstract

The synergy effects of hydrodynamic conditions and cetyl trimethylammonium bromide (CTAB) on the distribution behavior of bisphenol A (BPA) in sediment have been investigated using particle entrainment simulator (PES) and water bath shaker. The results showed that when the concentration of CTAB is below its critical micelle concentration (CMC), the shear stress has almost no effect on the equilibrium sorption amount of BPA on sediment, which is mainly related to the surfactant concentration. The sorption rates in the rapid sorption phase increased with increasing CTAB content and shear stress. When the concentration of CTAB exceeded CMC, equilibrium sorption amount and corresponding time of BPA on sediment both decreased with increasing shear stress, mainly because the hydrodynamic conditions enhanced the solubilization ability of the surfactant on BPA. It was also found that the sorption rate constant showed a linear increase trend with increasing shear stress.