School of Civil Engineering, Chang'an University, Xi'an, 710061, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
Chemosphere. 2023 Nov;341:140114. doi: 10.1016/j.chemosphere.2023.140114. Epub 2023 Sep 7.
A photocatalytic membrane coated with α-FeO/FeO nanoparticles 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-FeO identified 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 UV (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-FeO/FeO nanoparticles exhibited moderate removal of protein-like and terrestrially derived humic-like fluorescent organics while controlling membrane fouling. Although the α-FeO/FeO nanoparticles-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-FeO/FeO surface-modified membranes in the treatment of natural surface water.
已开发出一种涂覆有α-FeO/FeO 纳米颗粒的光催化膜，以解决处理天然地表水时膜污染和有机物去除的挑战。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 射线衍射法确认了氧化铁的成功制备，其中α-FeO 被确定为主要的光催化剂。使用商业超滤（UF）膜作为比较，以评估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 UV（22.0%）和特定荧光有机化合物（如组分 2（19.38%）和组分 3（16.89%））的去除率更好。此外，与对照组相比，所制备的膜的不可逆和可逆污染阻力均显著降低，分别降低了 39.4%和 50.2%。涂覆有α-FeO/FeO 纳米颗粒的膜在控制膜污染的同时，对蛋白质样和陆源腐殖质样荧光有机物具有适度的去除能力。尽管α-FeO/FeO 纳米颗粒涂覆的光催化膜表现出良好的抗污染性能，但由于水力停留时间较短，有机物的去除效果并不如预期的那样有效。本研究通过利用太阳能光催化α-FeO/FeO 表面改性膜处理天然地表水，为增强膜的污染物降解和抗污染性能提供了有价值的见解。
