Cited by 36Advanced oxidation water treatmentPer- and polyfluoroalkyl substances researchEnvironmental remediation with nanomaterials

Ce(Ⅲ) activates peroxymonosulfate for the degradation of substituted PAHs

Chen, Xuwen, Wang, Peixin, Peng, Fei, Zhou, Zhou, Waigi, Michael Gatheru, Ling, Wanting·2022·Chemosphere

Abstract

Substituted polycyclic aromatic hydrocarbons (SPAHs) are being intensively investigated, considering their high toxicity. Additionally, the mechanism of the effect of substituents on the removal of SPAHs and the activation of Ce(III) ions on peroxymonosulfate (PMS) have not been explored. Here we evaluated the removal efficiency of SPAHs in the oxidation system constructed by Ce(Ⅲ) ions and PMS, with emphasized the effect of substituents on SPAHs degradation. Ce(Ⅲ) has high catalytic performance for PMS, and the degradation percentage of all pollutants was higher than 92%. The significantly negative correlation between the reaction rate constants of SPAHs and the highest occupied molecular orbital-the lowest unoccupied molecular orbital gap, confirms that substituents lead to the differences in the degradation of SPAHs. The generation of reactive oxygen species (SO 4•-, •OH, and 1 O 2) is based on the electron transfer between Ce(Ⅲ) and PMS, and the contribution of ROS to substituted naphthalene varies due to the role of substituents. The Ce(Ⅳ)/Ce(Ⅲ) cycle accelerates the activation of PMS. Based on the transformation products and condensed Fukui function, the possible degradation pathways are inferred. In addition, inorganic anions and organic matter have little effect on the Ce(Ⅲ)/PMS system, which is a prerequisite for applying this system to real-world waste-water for SPAHs removal. This work demonstrates a new model of the degradation mechanism of SPAHs in the Ce(Ⅲ)/PMS system.

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Crossref · 10.1016/j.chemosphere.2022.135525

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Authors
Chen, X., Wang, P., Peng, F., Zhou, Z., Waigi, M. G., & Ling, W.
Affiliations
Nanjing Agricultural University (CN)
Corresponding author
Ling, Wanting
Venue
Chemosphere
Publisher
Elsevier BV
Published
2022-11
Volume
306
Pages
135525
ISSN
0045-6535 (ISSN-L)
OpenAlex
W4283727099
Cited by
36
References
52
Citations by year
2026: 4 · 2025: 9 · 2024: 13 · 2023: 8 · 2022: 2
FWCI
2.34
Type
journal article
Language
en
Open access
closed
Locations
  • Chemosphere (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
Keywords
peroxymonosulfate activation, cerium(III) catalysis, substituent effects, HOMO-LUMO gap, reactive oxygen species, sulfate radicals, hydroxyl radicals, singlet oxygen, degradation intermediates, Fukui function, degradation mechanism, wastewater treatment
MeSH terms
Peroxides, Polycyclic Aromatic Hydrocarbons, Water Pollutants, Chemical, Wastewater

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