Peroxymonosulfate activation by octahedral Cu2O for Orange Ⅰ degradation via radical and non-radical pathways. Issue 4 (August 2022)

• Record Type: Journal Article
• Authors: Yang, Yusong; Yu, Shuquan; Zong, Yuan; Wu, Ruiqi; Feng, Jing; Wei, Tong; Ren, Yueming
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 4(2022)
• Publication Date: 2022-08
• Subjects: Peroxymonosulfate -- Cu2O -- Radical -- Non-radical -- Orange Ⅰ; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.108113
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: In this study, cubic Cu2 O (c-Cu2 O) and octahedral Cu2 O (o-Cu2 O) were prepared through a simple method and applied to activate peroxymonosulfate (PMS) for the degradation of Orange Ⅰ (OⅠ). o-Cu2 O exhibited excellent activity for PMS activation with 85.68 % of OⅠ being removed within 30 min, and its catalytic activity remained high even if it was used repeated six times. The effects of PMS concentration, initial pH, anions (Cl –, HCO3 – and NO3 – ) and natural organic matter (NOM) on OⅠ degradation in the o-Cu2 O/PMS system were investigated. The mechanism study implied that OⅠ was oxidized via radical (SO4 –, OH and O2 – ) and non-radical ( 1 O2 and electron transfer) pathways in the o-Cu2 O/PMS system. This work provides an interesting insight into PMS activation by Cu-based catalysts for wastewater treatment. Highlights: c-Cu2 O and o-Cu2 O were synthesized by a simple method. o-Cu2 O was an excellent catalyst for PMS activation achieving higher OⅠ removal. The mechanism of PMS activation by o-Cu2 O was explored.