Water Environment Research, Journal Year: 2024, Volume and Issue: 96(2)

Published: Jan. 31, 2024

Abstract In this study, a highly efficient peroxymonosulfate (PMS) activator, ZnO/ZnMn 2 O 4 , was synthesized using simple one‐step hydrothermal method. The resulting bimetallic oxide catalyst demonstrated homogenous and high‐purity composition, showcasing synergistic catalytic activity in activating PMS for degrading 2, 4‐dichlorophenol (2, 4‐DCP) aqueous solution. This performance surpassed that of individual ZnO, Mn 3 ZnMn metal materials. Under the optimized conditions, removal efficiency 4‐DCP reached approximately 86% within 60 min, ability remained almost constant even after four cycles recycling. developed degradation system proved effective other azo‐dye pollutants. Certain inorganic anions such as HPO − HCO NO significantly inhibited 4‐DCP, while Cl SO 2− did not exhibit interference. Results from electrochemical experiments indicated electron transfer metals, occurred between oxidant. primary active radicals responsible were identified •− OH • generated through oxidation reduction catalyzed by Zn (II) (III). Furthermore, X‐ray photoelectron spectroscopy (XPS) analysis fresh used catalysts revealed exceptional ZnO facilitated valence (III) electrons to catalyst's oxygen surface, thus enhancing efficiency. intermediates indicates two main pathways involve hydroxylation radical attack on its aromatic ring. Practitioner Points A characterized. can synergistically activate degrade compared with single oxide. Three radicals, OH, promote degradation. promoted among three species facilitate oxidizing Hydroxylation ring are pathways.

Language: Английский