Localized photo-Fenton reaction boosted by spontaneous generation of H2O2 from thin water membrane. (April 2023)

• Record Type: Journal Article
• Authors: Li, Juan; Xia, Yu; Li, Jingxing; Long, Kaixiang; Chen, Fengjie; Feng, Min; Guo, ShiShang; Chen, Bolei
• Is Part Of: Journal of water process engineering. Volume 52(2023)
• Publication Date: 2023-04
• Subjects: Photo-Fenton reaction -- Spontaneously generated H2O2 -- Flowing microreactor -- Water-solid interface -- Contaminants degradation; Water-supply engineering -- Periodicals; Saline water conversion -- Periodicals; Seawater -- Distillation -- Periodicals; Sanitary engineering -- Periodicals; Sewage -- Purification -- Periodicals; 627
• DOI: 10.1016/j.jwpe.2023.103521
• Languages: English
• ISSNs: 2214-7144

Abstract

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 H2 O2 dosing. Here, we reported a porous aqueous thin membrane Fenton reactor supported by the Fe2 O3 modified non-woven. H2 O2 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/m 3 ·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. Highlights: An aqueous membrane microreactor is designed for Fenton reaction based on non-woven. The contact electrification between water-solid generated H2 O2 for Fenton reaction The throughput of the microreactor for water treatment is 4050 L/m 3 ·h.