Magnetically recyclable flake-like BiOI-Fe3O4microswimmers for fast and efficient degradation of microplastics

• 发表在: Journal of Environmental Chemical Engineering
• 主要作者: 2-s2.0-85135743976
• 格式: 文件
• 语言: English
• 出版: Elsevier Ltd 2022
• 在线阅读: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85135743976&doi=10.1016%2fj.jece.2022.108275&partnerID=40&md5=36c683e255ebc069111f7568bb4aa4f0

Microplastics ubiquitously in the environment endanger both marine organisms and human beings. Currently, the smaller sizes of microplastics in size ranging from 1 μm to 10 μm are likely to pass through the filtration systems in water treatment facilities and present in the drinking water supply. This study proposes a promising method of degrading the 1.1 μm polystyrene latex (PSL) beads microplastics using a self-propelled and magnetically recovered BiOI-Fe3O4 microswimmer. The results reveal flake-like BiOI-Fe3O4 microswimmer successfully degrades 64% polystyrene microplastics in 120 h and reduces the concentration of microplastics in an aqueous solution from 0.05 g/L to 0.018 g/L. The presence of visible light and H2O2 fuel induced the movement of the microswimmer by the decomposition of H2O2 into oxygen bubbles. It is observed that the microswimmer with the mean particle size of 3.913 μm can move at a reasonable speed of 3.0498 μm/s in 5 wt% H2O2 concentration under 3.6 W visible light irradiation. It can be concluded that PSL degrades rapidly when exposed to visible light for less than 24 h. © 2022 The Authors.