029

Title:

Enhanced Degradation of 1,4-dioxane by Photo-Fenton Reactive Ceramic Membrane

Discipline: Environmental Engineering

Presenter:

Shan Xue

Abstract:

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 were degraded within 12 h in batch experiments with the initial H2O2 concentration of 2 mM and the concentration of α-FeOOH catalyst of 1 g·L-1 under UV254 irradiation of 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. The removal efficiencies reached up to 15% during the dead-end filtration at a permeate flux of 12.46 LMH on the catalyst-coated ceramic membrane. This study embarks on a novel demonstration of enhanced catalytic degradation processes via incorporation of photo-Fenton reactions into membrane filtration.

Author(s):

Shan Xue

Funding Acknowledgements:

National Natural Science Foundation of China (51778306)