Waste control by waste: Fenton–like oxidation of phenol over Cu modified ZSM–5 from coal gangue

A novel and robust heterogeneous Cu catalyst using modified lignosulfonate as support for the synthesis of nitrogen-containing heterocycles

“…In the spectrum of Cu 2p 3/2 , the peak at ≈936 eV was assigned to Cu 2+ in the spinel, accompanied by the characteristic Cu 2+ shakeup satellite peaks at 938−948 eV, while the peak at ≈933 eV suggested the presence of Cu + and/or Cu 0 species. Because Cu 2p 3/2 XPS cannot differentiate between Cu + and Cu 0 , Auger Cu LMM spectra were further recorded, and the results confirmed the presence of Cu + at ≈570 eV, while Cu 0 at 565.6 eV [29][30][31], meaning that Cu 2+ species were partially reduced during the course of immobilization.…”

Enhanced Removal of Soluble and Insoluble Dyes over Hierarchical Zeolites: Effect of Synthesis Condition

“…The optimum concentration was estimated by identifying the XRD intensity of the samples which is proved as a simple method to distinguish zeolite crystallinity [23]. Figure S1 exhibits the crystallinity of ZSM-5 based on Equation 2 This pattern matched with pure MFI type zeolite without any other amorphous or crystalline impurities [24,25]. The pattern exhibited no significant changes after the treatment which shows that zeolite still maintained the MFI structure.…”

Hazardous wastes treatment technologies

“…Moreover, electro-Fenton treatment remained 90% activity after five repeated uses in dewatering filtrate. Li, Cheng, Liu, Cheng, Liu, and Du (2019) studied the removal of phenol via heterogeneous Fenton-like reaction using catalyst, prepared using coal gangue to prepare Cu modified Zeolite Socony Mobil-5 (Cn/ZSM-5). The redox Cu + /Cu 2+ couple accelerated active radical generation of •OH and 1 O 2 that degrades phenol entirely within 30 min and achieved 92% of TOC removal in 8 h. Navarro, Ichikawa, and Tatsumi (2019) investigated the treatment of electrodeless copper plating waste solutions, containing multiple organic compounds such as tartaric acid, formaldehyde, and formic acid, using Fenton-based oxidation method.…”

“…Li, Cheng, Liu, Cheng, Liu, and Du (2019) studied the removal of phenol via heterogeneous Fenton‐like reaction using catalyst, prepared using coal gangue to prepare Cu modified Zeolite Socony Mobil–5 (Cn/ZSM‐5). The redox Cu + /Cu 2+ couple accelerated active radical generation of ·OH and 1 O 2 that degrades phenol entirely within 30 min and achieved 92% of TOC removal in 8 h.…”