The present study evaluated a photo-Fenton reactive membrane that achieved enhanced 1,4-Dioxane removal performance. As a common organic solvent and stabilizer, 1,4-Dioxane is widely used in a variety of industrial products and poses negative environmental and health impacts. The membrane was prepared by covalently coating photocatalyst of goethite (α-FeOOH) on a ceramic porous membrane as we reported previously. The effects of UV irradiation, H₂O₂ and catalyst on the removal efficiency of 1,4-Dioxane in batch reactors were first evaluated for optimized reaction conditions, followed by a systematical investigation of 1,4-Dioxane removal in the photo-Fenton membrane filtration mode. Under optimized conditions, the 1,4-Dioxane removal rate reached up to 16% with combination of 2 mmol/L H₂O₂ and UV₃₆₅ irradiation (2000 µW/cm²) when the feed water was filtered by the photo-Fenton reactive membrane at a hydraulic retention time of 6 min. The removal efficiency and apparent quantum yield (AQY) were both enhanced in the filtration compared to the batch mode of the same photo-Fenton reaction. Moreover, the proposed degradation pathways were analyzed by density functional theory (DFT) calculations, which provided a new insight into the degradation mechanisms of 1,4-Dioxane in photo-Fenton reactions on the functionalized ceramic membrane.

本研究评估了实现增强的1,4-二恶烷去除性能的光Fenton反应膜。1,4-二恶烷作为一种常见的有机溶剂和稳定剂，被广泛用于各种工业产品中，并对环境和健康产生不利影响。如我们先前报道的，通过将针铁矿（α-FeO​​OH）的光催化剂共价涂覆在陶瓷多孔膜上来制备该膜。紫外线照射H ₂ O _2的影响首先针对最佳反应条件评估了催化剂和催化剂对间歇反应器中1,4-二恶烷的去除效率，然后系统地研究了在光芬顿膜过滤模式下1,4-二恶烷的去除。在最佳条件下，结合使用2 mmol / LH ₂ O ₂和UV ₃₆₅辐照（2000 µW / cm ^2），1,4-二恶烷的去除率可达到16％。），当进水通过水力Fenton反应膜过滤后，水力停留时间为6分钟。与相同的光芬顿反应的分批模式相比，过滤的去除效率和表观量子产率（AQY）均得到提高。此外，通过密度泛函理论（DFT）计算分析了拟议的降解途径，这为功能化陶瓷膜上光芬顿反应中1,4-二恶烷的降解机理提供了新见解。