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Efficient degradation and mineralization of polyethylene terephthalate microplastics by the synergy of sulfate and hydroxyl radicals in a heterogeneous electro-Fenton-activated persulfate oxidation system.
Lin, Yinghui; Zhang, Yuehua; Wang, Yonghao; Lv, Yuancai; Yang, Linyan; Chen, Zhijie; Ni, Bing-Jie; Chen, Xueming.
Afiliação
  • Lin Y; College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China.
  • Zhang Y; College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China.
  • Wang Y; College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China.
  • Lv Y; College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China.
  • Yang L; School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.
  • Chen Z; School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.
  • Ni BJ; School of Civil and Environmental Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia.
  • Chen X; College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350116, China. Electronic address: xuem.chen@hotmail.com.
J Hazard Mater ; 478: 135635, 2024 Oct 05.
Article em En | MEDLINE | ID: mdl-39182298
ABSTRACT
The presence of polyethylene terephthalate (PET) microplastics (MPs) in waters has posed considerable threats to the environment and humans. In this work, a heterogeneous electro-Fenton-activated persulfate oxidation system with the FeS2-modified carbon felt as the cathode (abbreviated as EF-SR) was proposed for the efficient degradation of PET MPs. The results showed that i) the EF-SR system removed 91.3 ± 0.9 % of 100 mg/L PET after 12 h at the expense of trace loss (< 0.07 %) of [Fe] and that ii) dissolved organics and nanoplastics were first formed and accumulated and then quickly consumed in the EF-SR system. In addition to the destruction of the surface morphology, considerable changes in the surface structure of PET were noted after EF-SR treatment. On top of the emergence of the O-H bond, the ratio of C-O/C=O to C-C increased from 0.25 to 0.35, proving the rupture of the backbone of PET and the formation of oxygen-containing groups on the PET surface. With the verified involvement and contributions of SO4•- and •OH, three possible paths were proposed to describe the degradation of PET towards complete mineralization through chain cleavage and oxidation in the EF-SR system.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: J Hazard Mater Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China País de publicação: Holanda