Formation of environmentally persistent free radicals on microplastics under UV irradiations.

Environmentally persistent free radicals (EPFRs) Microplastics (MPs) Ultraviolet irradiation

Journal

Journal of hazardous materials
ISSN: 1873-3336
Titre abrégé: J Hazard Mater
Pays: Netherlands
ID NLM: 9422688

Informations de publication

Date de publication:
05 Jul 2023
Historique:
received: 30 11 2022
revised: 17 03 2023
accepted: 21 03 2023
medline: 13 4 2023
pubmed: 13 4 2023
entrez: 12 4 2023
Statut: ppublish

Résumé

Microplastics (MPs) are widely distributed in the environment due to breakdown of widespread plastic wastes through physicochemical and biological processes. Environmentally persistent free radicals (EPFRs) might be generated as intermediates when MPs are further fragmented and decomposed under ultraviolet (UV) radiation. Formation of EPFRs is highly depended upon the radiation energy level. This study was designed to establish the correlation between EPFRs concentrations and UV energy. Polystyrene (PS) and polyethylene (PE) were employed to investigate the generation of EPFRs under the irradiation of three ultraviolet light sources (long-wave UVA, medium-wave UVB and short-wave UVC). Electron paramagnetic resonance (EPR) spectroscopy revealed that free radical signals were detected on PS irradiated by UVC and UVB and PE irradiated by UVC, which may be due to the difference in the MPs structure and UV energy. The g-factor and ΔH

Identifiants

DOI: 10.1016/j.jhazmat.2023.131277 PMID: 37043856
pubmed: 37043856
pii: S0304-3894(23)00559-9
doi: 10.1016/j.jhazmat.2023.131277
pii:
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

131277

Informations de copyright

Copyright © 2023. Published by Elsevier B.V.

Déclaration de conflit d'intérêts

Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Auteurs

Sijia Liu (S)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.

Weilin Huang (W)

Department of Environmental Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA.

Jingjing Yang (J)

Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510006, China.

Yu Xiong (Y)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.

Ziqing Huang (Z)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.

Jinling Wang (J)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.

Tingting Cai (T)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.

Zhi Dang (Z)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, China.

Chen Yang (C)

School of Environment and Energy, South China University of Technology, Guangzhou 510006, China; The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, China. Electronic address: cyanggz@scut.edu.cn.

Classifications MeSH