Long-acting removal of high-toxic p-nitrophenol in wastewater via peroxymonosulfate activation by cyclic membrane catalysis. (15th May 2023)

• Record Type: Journal Article
• Authors: Yang, Jingxin; Huang, Yongshi; Cheng, Yuhang; Wu, Xueyan; Lu, Jiangyan; Wan, Qingnan; Feng, Jianxian; Zeng, Qingyi; Zhao, Shuaifei; Yu, Li; Xiong, Zhu
• Is Part Of: Journal of cleaner production. Volume 401(2023)
• Publication Date: 2023-05-15
• Subjects: PMS activation -- Membrane reactor -- Cyclic catalysis -- Long-acting -- 4-NP cleaning; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2023.136739
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: In this work, the commonly-used peroxymonosulfate (PMS) activator (copper oxide nanoparticles, CuO NPs) was steadily loaded on a polydopamine (PDA)/polyethyleneimine (PEI)-modified non-woven fabric (NWF) membrane via the typical in-situ deposition method. Distinguished from the simple membrane catalysis separation, the as-prepared hybrid membrane (CuO@PDA/PEI-NWF) showed the better ability in oxidizing the high-toxic p-nitrophenol (4-NP) in feed while its permeate liquid backflowing constantly with the aid of a cross flow device. Within 60 min, even a small area of CuO@PDA/PEI-NWF (9.0 cm 2 ) with only ∼0.2 g weight could generate vast of reactive species ( 1 O2, SO4 ‾, and OH) with trace PMS (1 mM) activation, and then reduced ∼40% of COD in a large volume (1 L) of 5 ppm 4-NP polluted water. The removal of 4-NP was further increased with more PMS added in the cyclic membrane catalysis system. The highest degradation rate could be achieved at pH close to the neutral state due to the better redox circle of Cu 2+ /Cu + in the system. Electrospray ionization mass spectrometry (ESI-MS) revealed that the 4-NP structure was primarily destroyed by the addition reaction of radicals (SO4 ‾, and OH), while its oxidation mineralization was caused by the formed 1 O2, during the cyclic membrane catalysis system. Most importantly, this CuO@PEI/PDA-NWF/PMS cyclic system displayed excellent robustness and sustainability without tedious catalyst separation/regeneration processes in treating the 4-NP polluted real water. During 360 min of cyclic membrane catalysis, CuO@PEI/PDA-NWF caused the decrease of COD in Pearl River water with high concentration of 4-NP (20 ppm) up to ∼80%, indicating its high-efficiency and long-effectiveness. This study offers significant insights into developing novel cyclic membrane reactors with PMS activation for practically tricky wastewater treatment. Graphical abstract: A stable cyclic membrane catalysis system coupled with PMS activation for sustainable catalytic degradation of refractory 4-NP was constructed by in situ generating CuO NPs on the nonwoven fabric membranes. Image 1 Highlights: Copper oxide nanoparticles co-supported cyclic membrane reactor was robustly fabricated. The reactor removed more 4-NP compared to simple-pass membrane catalysis. The reactor showed long-action oxidation degradation in cleaning 4-NP with PMS activation. The feasibility and high-efficiency in treating the actual wastewater was demonstrated.