Cu2O/CuO induced non-radical/radical pathway toward highly efficient peroxymonosulfate activation. Issue 6 (December 2021)

• Record Type: Journal Article
• Authors: Zhu, Yi; Li, Dongya; Zuo, Shiyu; Guan, Zeyu; Ding, Su; Xia, Dongsheng; Li, Xiaohu
• Is Part Of: Journal of environmental chemical engineering. Volume 9:Issue 6(2021)
• Publication Date: 2021-12
• Subjects: Cu2O and CuO -- Radical -- Non-radical -- Peroxymonosulfate -- Bisphenol A; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2021.106781
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: The synergistic mechanism of free radical non-radical catalytic pathways, as a pivotal step for effective degradation of organic pollutants, has been widely concerned. A novel Cu2 O/CuO was prepared to efficiently catalyze peroxymonosulfate (PMS) to degrade organic pollutants in the free radical/non-radical pathway, showing excellent catalytic activity and high stability. The Cu2 O/CuO-PMS was endowed with great adaptability over a wide pH range (pH 3–11) and varies inorganic anions (SO4 2−, NO3 −, HCO3 − and Cl − ) for degradation of Bisphenol A (BPA). The experiments and characterization analyses demonstrated that free radicals ( · OH, SO4 ·- ) and non-free radicals (Cu(III), 1 O2, surface complexes) were the active species and the synergistic catalytic mechanism associated with Cu(III)/Cu(Ⅱ)/Cu(I) redox cycles. In addition, based on the UPLC/MS results and toxicity assessment data, a possible degradation pathway for BPA was proposed, and it also showed that the system could degrade the contaminants to less toxic or harmless small molecules. The results of this work show the notable potential of Cu2 O/CuO activating PMS to degrade organic pollutants in complex aqueous environments. Graphical Abstract: ga1 Highlight: The Cu2 O/CuO for PMS efficient activation was synthesized. The Cu2 O/CuO/PMS realized the rapid conversion of Cu(II) to Cu(I). Removal of BPA resulted from HO·, 1 O2, surface complexes, Cu(III) and SO4 - · . The Cu2 O/CuO/PMS presented a wide pH range suitability