文献类型：期刊文献

英文题名：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

作者：Lin, Yinghui[1];Zhang, Yuehua[1];Wang, Yonghao[1];Lv, Yuancai[1];Yang, Linyan[2];Chen, Zhijie[3];Ni, Bing-Jie[3];Chen, Xueming[1]

机构：[1]Fuzhou Univ, Coll Environm & Safety Engn, Fuzhou 350116, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Univ New South Wales, Sch Civil & Environm Engn, Sydney, NSW 2052, Australia

年份：2024

卷号：478

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20243516954170);WOS:【SCI-EXPANDED(收录号:WOS:001302766200001)】；

基金：This work was supported by Fuzhou University (grant number: GXRC-20095) . The authors declare that they have no known competing financial interests.

语种：英文

外文关键词：Electro-Fenton; Hydroxyl radical; Microplastics; Polyethylene terephthalate; Sulfate radical

摘要：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 center dot- and (OH,)-O-center dot three possible paths were proposed to describe the degradation of PET towards complete mineralization through chain cleavage and oxidation in the EF-SR system.