This study investigated the degradation of 1,4-dioxane using the photo-Fenton ceramic membrane filtration with goethite (α-FeOOH) as the photocatalyst. The effects of different concentrations of the H2O2, UV irradiation wavelength and initial 1,4-dioxane concentrations on the degradation efficiency were systematically investigated. 90% of 1,4-dioxane with an initial concentration of 10.77 mg L-1 and α-FeOOH dose 1 g L-1 were degraded within 12 h in batch experiments with the initial H2O2 concentration of 2 mM under UV254 irradiation at 2000 μW cm-2. In the filtration studies, evaluation of 1,4-dioxane degradation was conducted with/without addition of H2O2, goethite coating and/or UV irradiation. Additionally, the total organic carbon (TOC), hydroxyl radicals and degradation by-products were both assessed under different degradation conditions to achieve deeper insight into the degradation mechanisms of 1,4-dioxane. Similar to the impact of the initial 1,4-dioxane concentration, increasing the influent flux essentially increases the level of the electron loading from the influent pollutant(Je) and decreases the degradation rate of 1,4-dioxane. The removal efficiencies reached up to 15% when the influent flux is less than 12.46 LMH with the coated ceramic membrane. This study embarks on a novel demonstration of enhanced catalytic degradation processes via incorporation of photo-Fenton reactions into membrane filtration.

Enhanced degradation of 1,4-dioxane by photo-fenton reactive ceramic membrane

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.