胶团强化超滤处理含镍废水

胶团强化超滤(MEUF)是一种高效分离水中金属离子的技术。以无机陶瓷膜为媒介,采用胶团强化超滤法处理含镍废水,考察膜孔径,表面活性剂十二烷基硫酸钠(SDS)浓度、镍离子浓度、pH值等因素对胶团强化超滤过程的影响。实验结果表明:膜孔径、SDS浓度、pH值对镍离子截留率有显著影响。当废水温度为20℃,操作压力为0.15 MPa,膜孔径为20 nm,SDS浓度为6.0 mmol/L时超滤效果最好;在此条件下,镍离子的截留率达99.25%,膜通量为89.65 L/(m2.h)。

Removal of Nickel Ions in Aqueous Solution via Micellar Enhanced Ultrafiltration

Micellar-enhanced ultrafiltration(MEUF)is an effective separation technique for removing metal ions from aqueous environment.The simulated wastewater containing nickel ion was treated by MEUF using inorganic ceramic ultrafiltration membrane and sodium lauryl sulfate(SDS),a kind of anionic surfactant.Effects of some important parameters were investigated,such as membrane pore size,concentration of SDS,concentration of nickel ion,pH value of solution.Experimental results indicated that the ultrafiltration effect was the best when temperature was 20 ℃,transmembrane pressure 0.15 MPa,membrane pore size 20 nm and surfactant concentration 6.0 mmol/L.Under the conditions,the rejection ratio of nickel ion was up to 99.25% and membrane flux was 89.65 L/(m2·h).