Peroxymonosulfate activation by octahedral Cu2O for Orange Ⅰ degradation via radical and non-radical pathways

作者：Yang Yusong; Yu Shuquan; Zong Yuan; Wu Ruiqi; Feng Jing; Wei Tong; Ren Yueming

来源：Journal of Environmental Chemical Engineering, 2022, 10(4): 108113.

DOI：10.1016/J.JECE.2022.108113

• Peroxymonosulfate
• Cu
• 2
• O
• Radical
• Non-radical
• Orange Ⅰ

In this study, cubic Cu2O (c-Cu2O) and octahedral Cu2O (o-Cu2O) were prepared through a simple method and applied to activate peroxymonosulfate (PMS) for the degradation of Orange Ⅰ (OⅠ). o-Cu2O 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\u003csup\u003e–\u003c/sup\u003e, HCO3\u003csup\u003e–\u003c/sup\u003e and NO3\u003csup\u003e–\u003c/sup\u003e) and natural organic matter (NOM) on OⅠ degradation in the o-Cu2O/PMS system were investigated. The mechanism study implied that OⅠ was oxidized via radical (SO4\u003csup\u003e?–\u003c/sup\u003e, ?OH and O2\u003csup\u003e?–\u003c/sup\u003e) and non-radical (\u003csup\u003e1\u003c/sup\u003eO2 and electron transfer) pathways in the o-Cu2O/PMS system. This work provides an interesting insight into PMS activation by Cu-based catalysts for wastewater treatment.

• 单位
  哈尔滨工程大学