胶束强化超滤去除水中双酚A

Removal of bisphenol A in aqueous solution by micellar enhanced ultrafiltration

采用截留分子量(MWCO)为5000 Dalton、1000 Dalton的聚砜超滤膜,MWCO为1 kDa的再生纤维素超滤膜;采用十二烷基苯磺酸钠(SDBS)、曲拉通100(TritonX-100)、吐温80(Tween-80)、烷基多苷(APG)为表面活性剂,用胶团强化超滤工艺去除水中双酚A。研究了不同材质和截留分子量的超滤膜、表面活性剂浓度、膜操作压力、溶液pH和溶液中电解质等因素对该工艺的影响。结果表明,SDBS对双酚A有较好的去除效果,去除率在80%以上。在H+和Na+存在的条件下,双酚A的截留率增加,透过液中SDBS浓度降低。SDBS与非离子表面活性剂的复配可以提高双酚A截留率,降低透过液中SDBS的浓度,复配效果优劣顺序为Tween-80>TritonX-100>APG。

Micellar-enhanced ulrafiltration（MEUF） was used to remove bisphenol A from aqueous solution using two polysulfone membranes of 1 000 and 5 000 Dalton molecule weight cut-off（MWCO）,one regenerated cellulose membrane of 1 000 Dalton molecule weight cut-off.Experiments were performed as a function of an anionic surfactant sodium dodecylbenzene sulfonate（SDBS）,an cationic surfactant cetylpyridinium chloride and three nonionic surfactants TritionX-100,Tween-80 and alkyl poly-glycosides.The effects of some important parameters were investigated,including different material and weight cut-off membranes,the concentration of surfactants,trans-membrane pressure,solution pH and the concentration of feed electrolyte.The results show that SDBS had great effect on the removal efficiency of bisphenol A,the rejection of bisphenol A was more than 80%.It is shown that the rejection of bisphenol A increased and the permeate concentration of SDBS decreased by free ions（H^＋ and Na^＋）.SDBS and nonionic surfactants mixed micelles can increase the rejection of bisphenol A and decrease the permeate concentration of SDBS.The preferential order is Tween-80,TritonX-100 and alkyl poly-glycosides.