期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 399, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123023
关键词
Hazardous microplastics; Reductive dechlorination; Hydroxyl radical oxidation; Electrocatalytic degradation
资金
- Key Shandong Natural Science Foundation [ZR2018ZC0843]
- Fundamental Research Funds of Shandong University [2018JC058]
Nowadays, microplastic pollution has been brought into focus for its hazards to aquatic life. However, researches on the electrocatalytic treatment for efficient degradation of microplastics are still insufficient. Herein, an electro-Fenton like (EF-like) technology based on TiO2/graphite (TiO2/C) cathode was put forward to degrade polyvinyl chloride (PVC), a typical microplastic in water. It exhibited a remarkable performance on PVC degradation via cathodic reduction dechlorination and hydroxyl radical (O%H) oxidation simultaneously. Besides, the effects of reaction temperature and initial PVC concentration were investigated. Under optimal conditions, the dechlorination efficiency of PVC reached 75 % after potentiostatic electrolysis at-0.7 V vs. Ag/AgCl for 6 h. The intermediate products were explored during the degradation of PVC microplastics. The surface morphologies and molecular weight of PVC changed accordingly. Based on these results, a possible degradation process for PVC was proposed. This work demonstrated that such a heterogeneous EF-like technology using TiO2/C cathode was hopefully to provide an eco-friendly method for microplastic wastewater treatment.
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