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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。
Using a polysulfone ultrafiltration membrane with a molecular weight cut off (MWCO) of 5000 Dalton and 1000 Dalton and a regenerated cellulose ultrafiltration membrane with a MWCO of 1 kDa, sodium dodecyl benzene sulfonate (SDBS), TritonX -100), Tween 80 (80) and alkyl polyglucoside (APG) were used as surfactant. The bisphenol A in water was removed by micellar enhanced ultrafiltration. The effects of factors such as ultrafiltration membrane with different materials and molecular weight cut-off, surfactant concentration, membrane operating pressure, solution pH and electrolyte in solution on the process were studied. The results showed that SDBS had a good removal of bisphenol A and the removal rate was over 80%. In the presence of H + and Na +, the rejection of bisphenol A increases and the concentration of SDBS in the permeate decreases. The combination of SDBS and nonionic surfactants can increase the rejection rate of bisphenol A and decrease the concentration of SDBS in the solution. The order of the combination is Tween-80> TritonX-100> APG.