胶团强化超滤法(MEUF)去除废水中氯苯的研究

研究了3种单一表面活性剂十二烷基硫酸钠(SDS)、十六烷基三甲基溴化铵(CTMAB)、聚氧乙烯失水山梨脂肪酸酯醇醚(TW80)和混合表面活性剂TW80-SDS对氯苯(CB)的强化超滤,以期为有机废水胶团强化超滤技术提供参考。结果表明,进料液静置时间对去除率无显著影响,而振荡时间在1 h后对去除率影响不大。氯苯的去除率随进料液中表面活性剂浓度的增大而增大,单一的表面活性剂对氯苯的去除效果顺序为TW80CTMABSDS,且表面活性剂对氯苯的去除效果与表面活性剂的临界胶束浓度值(CMC)、亲水-亲油平衡值(HLB)呈负相关。阴-非混合表面活性剂TW80-SDS对氯苯的去除效果明显强于单一的SDS,且去除率随着非离子表面活性剂质量分数的增加而增加。渗透通量随着进料液中表面活性剂浓度的增加而下降,单一表面活性剂种类对渗透通量的影响顺序为SDSTW80CTMAB,混合表面活性剂中随着非离子表面活性剂质量分数的增加而渗透液的渗透通量越低。

Removal of chlorobenzene in wastewater by micellar-enhanced ultrafiltration (MEUF)

The removal of chlorobenzene (CB) in wastewater by micellar-enhanced uhrafihration (MEUF)using three single surfactants,such as sodium dodecyl sulfate (SDS),cetyltrimethylammonium bromide(CT-MAB)and Tween-80(TW80),and the mixed surfactant SDS-TW80,was investigated.The results showed that the effect of standing time on CB removal was neglected while that of shaking time changed little after CB was shaken for 1 h.The removal efficiencies of CB increased with surfactant concentration increasing.The removal efficieneies of CB by single surfactants followed the order as TW80>CTMAB>SDS.which appeared to be negatively related to the critical micelle concentrations (CMC) and the hydrophile-lypophile balance values(HLB)of surfactants.It was also indicated that the removal efficiencies of CB by the mixed surfactants SDS-TW80 could be significantly increased compared with the single anionic surfactant SDS.The removal effects could be enhanced while the mass ratios of nonionic surfactant TW80 in the mixed surfactants increased.In addition,the greater the concentration of surfactant,the less the permeat flux.The permeat flux by single surfactants followed the order as SDS>TW80>CTMAB.The permeat flux could be reduced when the mass ratio of nonionic surfactant in the mixed surfactant increased.