Photocatalytic membrane coated with α-Fe2O3/Fe3O4 for enhanced filtration performance and antifouling property in surface water treatment.
Photocatalytic membrane coated with α-Fe2O3/Fe3O4 for enhanced filtration performance and antifouling property in surface water treatment.
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DOI：
10.1016/j.chemosphere.2023.140114
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发表时间：
2023-09
期刊：
影响因子：
8.8
通讯作者：
Yuanqing Guo;Quan Liu;Xiaobing Tang;Heng Liang;Guibai Li;Liwei Yang;Lu Wang;Xiaoling Li;
中科院分区：
文献类型：
--
作者：
Yuanqing Guo;Quan Liu;Xiaobing Tang;Heng Liang;Guibai Li;Liwei Yang;Lu Wang;Xiaoling Li;
制备了一种α-Fe2O3/ fe3o4纳米颗粒包覆的光催化膜，以解决天然地表水处理中膜污染和有机去除的难题。通过多种方法研究了膜的光催化和过滤性能。通过紫外-可见漫反射光谱和x射线衍射证实了氧化铁的成功制备，并确定α- fe2o3为一级光催化剂。以工业超滤（UF）膜为对照，评价了改性膜的光催化性能和过滤性能。结果表明，与对照组相比，光催化膜对UV254（22.0%）和特定荧光有机物组分2（19.38%）、组分3（16.89%）的去除率更高。此外，制备的膜的不可逆和可逆污垢抗性均显著低于对照组，分别降低了39.4%和50.2%。α-Fe2O3/ fe3o4纳米颗粒包被的膜在控制膜污染的同时，对类蛋白和类地腐殖质荧光有机物有适度的去除。虽然α-Fe2O3/ fe3o4纳米颗粒包覆光催化膜具有良好的抗污染性能，但由于水力停留时间较短，对有机物的去除效果不如预期。本研究为利用太阳光催化α-Fe2O3/ fe3o4表面修饰膜处理天然地表水，提高膜的污染物降解和抗污染性能提供了有价值的见解。
A photocatalytic membrane coated with α-Fe2O3/Fe3O4nanoparticles has been developed to address the challenges of membrane fouling and organic removal in the treatment of natural surface water. The photocatalytic and filtration properties of the membranes were investigated through a variety of methods. The successful preparation of iron oxide was confirmed by UV–vis diffuse reflectance spectra and X-ray diffractometry, with α-Fe2O3identified as the primary photocatalytic agent. A commercial ultrafiltration (UF) membrane was employed as a comparison to evaluate the photocatalytic performance and filtration properties of the modified membrane. Results showed that the photocatalytic membrane achieved better removal rates for UV254(22.0%) and specific fluorescent organic compounds, such as component 2 (19.38%) and component 3 (16.89%), compared to the control group. Furthermore, both irreversible and reversible fouling resistances of the prepared membranes were significantly lower than that of the control group, with reductions of 39.4% and 50.2%, respectively. The membrane coated with α-Fe2O3/Fe3O4nanoparticles exhibited moderate removal of protein-like and terrestrially derived humic-like fluorescent organics while controlling membrane fouling. Although the α-Fe2O3/Fe3O4nanoparticles-coated photocatalytic membrane demonstrated good anti-fouling properties, the removals of organic matters were not as effective as anticipated due to the shorter hydraulic retention time. This study provides valuable insights for enhancing pollutant degradation and anti-fouling properties of membranes through the utilization of solar photocatalytic α-Fe2O3/Fe3O4surface-modified membranes in the treatment of natural surface water.