羟基氧化铁复合膜的制备及光芬顿辅助自清洁性能
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河北工业大学 化工学院,天津 300130

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TB383;TQ028.8

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河北省重点研发计划国际科技合作专项项目(17393601D);河北省高等学校科学技术研究项目(ZD2021033)


Preparation of Hydroxyl Iron Oxide Composite Membrane with Photo-Fenton Assisted Self-Cleaning Performance
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    摘要:

    分别制备了具有海胆形结构的FeOOH-SiO2复合微球和梭形的FeOOH微粒,以聚醚砜(PES)超滤膜为基膜,表面共沉积聚多巴胺(PDA)和聚乙烯亚胺(PEI)作为分离活性层,并利用其粘合作用将制得的粒子固定在膜表面,获得一种新型复合膜。研究了复合膜的印染废水分离处理性能,并对比了不同形貌的粒子对复合膜的抗污染和自清洁能力。研究发现,复合膜具有高水通量的同时,对盐/染料具有较好的分离性能。并且引入粒子作为光催化层,赋予了复合膜良好的抗污染能力和光芬顿自清洁性能。更重要的是,与梭形FeOOH粒子复合膜相比,海胆形FeOOH-SiO2微球复合膜由于FeOOH-SiO2微球本身独特的三维结构,以及与膜的活性分离层之间微小的接触面积,从而保持了复合膜在清洁过程中更好的分离稳定性,经过4个周期的光芬顿自清洁过程,通量恢复率一直稳定在98%左右。

    Abstract:

    FeOOH-SiO2 composite microspheres with sea urchin-shaped structure and shuttle-shaped FeOOH particles were prepared, respectively. A novel composite membrane was prepared by using polyethersulfone (PES) ultrafiltration membrane as the base membrane, co-depositing polydopamine (PDA) and polyethyleneimine (PEI) as the active separation layer, and using their adhesion to immobilize manufactured particles on the membrane surface. The separation and treatment performance of the composite membranes for dyeing wastewater was studied, and the anti-pollution and self-cleaning abilities of the composite membranes were compared for particles with different morphologies. Results indicated that the composite membranes have high water flux, while maintaining a competitive dye/salt separation performance. In addition, the introduction of particles as the photocatalytic layer endows the composite membranes stronger anti-pollution ability and photo-Fenton self-cleaning performance. More importantly, compared with the shuttle-shaped FeOOH particle composite membrane, the sea urchin-shaped FeOOH-SiO2 microsphere composite membrane maintains better separation stability during the cleaning process due to its unique three-dimensional structure of FeOOH-SiO2 microspheres themselves, and the microscopic contact area with the active separation layer of the membrane. After 4 cycles of the photo-Fenton self-cleaning process, the flux recovery rate has been stable at about 98%.

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  • 收稿日期:2022-03-14
  • 最后修改日期:2022-05-12
  • 录用日期:2022-06-20
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