Abstract:Using polyaluminum chloride (PAC) and ferric chloride (FeCl3) as coagulants, the removal of bisphenol A (BPA) was investigated in coagulation process of 1g/L kaolin synthetic solution. The circular cross-flow filtration method to enhance the accumulation of membrane fouling was used to evaluate the BPA removal efficiency of the cake layer. The removal efficiency of BPA with clean microfiltration (MF) cut off decreased obviously when the adsorbed BPA reached saturation in a short period of time. The cake layer which was formed by the circular membrane filtration of mixture promoted the BPA removal, and the membrane resistance in circular membrane filtration reached minimum when removal efficiency of BPA was highest in a single coagulation process. In PAC coagulation-membrane filtration experiments, BPA removal efficiency was increased 34.30% than that in single coagulation; while in FeCl3 coagulation-membrane filtration experiments, BPA removal efficiency was increased 28.38% than that in single coagulation, indicating that the formation of cake layer has promoted the BPA removal. Also, the BPA removal efficiency for the initial BPA concentration of 100μg/L was 7% higher than that for the initial BPA concentration of 5mg/L by coagulation-circular membrane filtration.
王捷, 何玉倩, 张宏伟. 混凝-膜过滤中滤饼层对双酚A的去除强化作用研究[J]. 中国环境科学, 2012, 32(3): 454-460.
WANG Jie, HE Yu-Qian, ZHANG Hong-Wei. Enhanced removal of bisphenol A by the cake layer in coagulation-microfiltration process. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(3): 454-460.