低压耐污共混纳滤膜的研发及其对典型溶解性有机物的去除研究

发布时间：2018-06-13 01:32

本文选题：纳滤膜 + 介孔硅　；参考：《水处理技术》2017年05期

【摘要】：采用相转化法制备掺杂介孔硅的共混纳滤膜。利用N2吸附-脱附和小角XRD测试对制备的介孔硅进行表征,结果证明共混膜中的掺杂材料为有序的介孔硅材料。利用扫描电子显微镜(SEM)对制备的共混膜截面进行表征,结果表明介孔硅的添加能够明显改变膜的结构和均匀性。研究了共混纳滤膜的截留分子量和耐污性能实验,结果表明介孔硅的添加能够缩小膜的孔径,其中,0.2wt%、0.5wt%、1.0wt%掺量共混纳滤膜的膜孔半径为0.78~2.13nm;均匀性越好的共混纳滤膜水通量变化越小,水通量恢复率越高。考察自制共混纳滤膜对富里酸的去除效果,结果表明掺杂介孔硅的共混纳滤膜可以明显提高对富里酸截留率,截留率最高的0.2wt%共混纳滤膜效果明显优于商业膜NF-70。
[Abstract]:The blend nanofiltration membranes doped with mesoporous silicon were prepared by phase inversion method. The mesoporous silicon was characterized by N2 adsorption-desorption and small angle XRD. The results show that the doped materials in the blend film are ordered mesoporous silicon materials. The cross section of the blend film was characterized by scanning electron microscope (SEM). The results show that the addition of mesoporous silicon can obviously change the structure and uniformity of the film. The molecular weight interception and fouling resistance of the blend nanofiltration membrane were studied. The results show that the addition of mesoporous silicon can reduce the pore size of the membrane, and the pore radius of the blend nanofiltration membrane is 0.78 ~ 2.13 nm, and the water flux of the blend nanofiltration membrane with better homogeneity is smaller, and the pore radius of the blend nanofiltration membrane is 0.78 ~ 2.13 nm. The recovery rate of water flux is higher. The removal of fulvic acid by self-made blend nanofiltration membrane was investigated. The results showed that the removal rate of fulvic acid was obviously increased by the blend nanofiltration membrane doped with mesoporous silicon, and the effect of 0.2 wt% blend nanofiltration membrane with the highest rejection rate was obviously better than that of commercial membrane NF-70.
【作者单位】：浅水湖泊综合治理与资源开发教育部重点实验室河海大学环境学院;
【基金】：国家自然科学基金“含氮污染物在城市给水系统中转化机制与控制原理”(51438006) 国家重大仪器设备开发专项“原子荧光重金属在线监测设备的开发与应用”(2014YQ060773) 江苏高校优秀学科建设工程资助项目(PAPD)
【分类号】：TQ028.8;TU991.2

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