Unraveling the Overlooked Involvement of High-Valent Cobalt-Oxo Species Generated from the Cobalt(II)-Activated Peroxymonosulfate Process
Tongji University · State Key Laboratory of Pollution Control and Resource Reuse · +2 more institutions
Abstract
Sulfate radical (SO4•–) is widely recognized as the predominant species generated from the cobalt(II)-activated peroxymonosulfate (PMS) process. However, in this study, it was surprisingly found that methyl phenyl sulfoxide (PMSO) was readily oxidized to the corresponding sulfone (PMSO2) with a transformation ratio of ∼100% under acidic conditions, which strongly implied the generation of high-valent cobalt-oxo species [Co(IV)] instead of SO4•– in the Co(II)/PMS process. Scavenging experiments using methanol (MeOH), tert-butyl alcohol, and dimethyl sulfoxide further suggested the negligible role of SO4•– and hydroxyl radical (•OH) but favored the generation of Co(IV). By employing 18O isotope-labeling…
Citation impact
- FWCI
- 24.25
- Percentile
- 100%
- References
- 61
Authors
8- YZYang Zong
Tongji University, State Key Laboratory of Pollution Control and Resource Reuse
- XGXiaohong Guan
Tongji University, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security
- JXJun Xu
Tongji University, State Key Laboratory of Pollution Control and Resource Reuse
- YFYong Feng
South China Normal University
- YMYunfeng Mao
Tongji University, State Key Laboratory of Pollution Control and Resource Reuse
Topics & keywords
- Chemistry
- Cobalt
- Oxidizing agent
- Decomposition
- Nitrobenzene
- Sulfone
- Hydroxyl radical
- Sulfate
- Life in Land