Activation of persulfate on fluorinated carbon: Role of semi-ionic C-F in inducing mechanism transition from radical to electron-transfer nonradical pathway

Ye, Feng; Su, Youfeng; Li, Ruipeng; Sun, Wei; Pu, Mengjie; Cao, Yang; Yang, Wenchao; Huang, Haiming; Zhang, Qichun; Wong, Jonathan W C

doi:10.1016/j.apcatb.2023.122992

Cited by 23 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…HA is one of the common forms of NOM, and its effect on the CoFe@CSC-700/PMS system is also significant. The inhibitory effect of HA on LEV degradation decreased to 86.2% with the addition of HA (Figure 9), which was attributed to the fact that HA, with its rich electronic structure, competes with LEV for •OH and SO 4 • − , thus inhibiting LEV degradation [43,44]. In summary, the order of inhibition of LEV degradation by different water quality backgrounds was Cl…”

Section: Catalytic Performancementioning

confidence: 92%

Preparation of Bimetallic CoFe@CSC-700 Carbonated Microspheres and Activated Peroxymonosulfate for Degradation of Levofloxacin

Hu,

Chen,

Guo

et al. 2024

Water

View full text Add to dashboard Cite

The exploration of efficient, low-leaching, and recyclable transition-metal-based catalysts is of great importance for the removal of pollutants from peroxymonosulfate (PMS) in water purification processes. In this study, a bimetallic CoFe@CSC-700 composite was prepared by an alkaline gel pyrolysis reduction method using chitosan as a forming agent and applied to activate PMS to degrade levofloxacin (LEV). The leaching concentration of both cobalt and iron ions in the CoFe@CSC-700 catalyst was reduced by about 8-fold compared to the monometallic composite pellet catalyst. In addition, the removal efficiency of the CoFe@CSC-700 catalyst can still reach 90% after five cycles, showing good recyclability, recoverability and stability. Both free radical pathways (SO4·−, ·OH, and ·O2−) and non-free radical pathways (1O2) were detected in the oxidation reaction, with free radical pathways as the main contributor. The possible degradation pathways of LEV were proposed by LC-MS tests. Overall, this study provides new insights into the construction of efficient and stable PMS catalysts for wastewater treatment.

show abstract

Section: Catalytic Performancementioning

confidence: 92%