Localized photo-Fenton reaction boosted by spontaneous generation of H2O2 from thin water membrane

Abstract

Fenton AOPs in microreactors offer many significant advantages over the use of conventional reactors for water purification because they enable the more efficient generation of hydroxyl radicals. However, it is still challenging to apply the Fenton AOPs in microreactors for real applications due to their low water throughput and complex device design for H2O2 dosing. Here, we reported a porous aqueous thin membrane Fenton reactor supported by the Fe2O3 modified non-woven. H2O2 was generated by the contact electrification between water and non-woven, and further enhanced by the introduction of light irradiation and heat. The source water flowed through the non-woven, and thus removed the contained pollutants continuously at the water-solid interface. Additionally, the overall size of the device and its tilt angle were also discussed to optimize the membrane reactor purification ability, ensuring a significant treatment flux in the flow reactor while maximizing the pollutant degradation efficiency. 76 % of degradation efficiency and 4050 L/m3·h of throughput were achieved based on our porous aqueous membrane Fenton reactor. Our work may offer valuable insight for the future development of high-throughput aqueous membrane reactors for environmental purposes.