Application of nickel foam supported Cu–MnO2 in microwave enhanced Fenton-like process for p-nitrophenol removal: Degradation, synergy and mechanism insight. (15th April 2023)

• Record Type: Journal Article
• Authors: Shen, Tianyao; Tian, Ke; Cao, Menghan; Li, Letian; Shi, Fengyin; Qu, Jianhua; Zheng, Qingzhu; Zhang, Guangshan
• Is Part Of: Journal of cleaner production. Volume 397(2023)
• Publication Date: 2023-04-15
• Subjects: Microwave -- Fenton-like -- PNP degradation -- Cu–MnO2/NF; 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.2023.136442
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Diatomic metals catalysts (DAMCs) have attracted researchers' attention in Fenton-like reactions for persistent organic pollutants elimination. A novel composite of Cu–MnO2 loaded on the nickel foam (Cu–MnO2 /NF) was synthesized and creatively combined with a microwave (MW) enhanced Fenton-like system—promoting the p -nitrophenol (PNP) removal efficiency to 92.4% within 10 min. The synergistic effect (ξ) between Cu–MnO2 /NF and power-control MW-Fenton-like process was up to 11.69 ≫ 0, and the non-thermal result significantly contributed. The participation of Cu–MnO2 /NF significantly increased the system's energy efficiency from 3.58 mg·kWh −1 to 44.35 mg·kWh −1 . Different from specific degradation, the system maintained high removal efficiency with various pollutants (methylene blue (MB), rhodamine B (RhB), bisphenol A (BPA), and diclofenac sodium (DCF)). The stability of CuMnO2 /NF was verified via the recovery experiment, and the applicability of the MW-Fenton-like system has been confirmed. The PNP degradation mechanism was systematically discovered by electron paramagnetic resonance (EPR) detection and radical scavenging experiments. Multiple active species (HO, e −, O2 -, h +, and 1 O2 ) were generated on the Cu–MnO2 /NF surface via electronic transfer and the selective absorption of microwaves. Overall, this study proposes a new possibility in the MW-Fenton-like technology investigation. Graphical abstract: Image 1 Highlights: MW enhanced Cu–MnO2 /NF Fenton-like system has high efficiency in PNP removal. The synergy between catalysts and microwaves was systematically investigated. The non-thermal effect is the major activation factor in the MW-Fenton-like system. The application of Cu–MnO2 /NF could increase energy efficiency effectively.