Fe3O4/Laser-Induced Graphene as an Adsorbent for Microplastics Emitted from Household Wastewater

• Published in: International Journal of Precision Engineering and Manufacturing-Green Technology Vol. 10; no. 3; pp. 807 - 818
• Main Authors: Jeong, Sung-Yeob, Sugita, Naohiko, Shin, Bo-Sung
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society for Precision Engineering 01.05.2023; Springer Nature B.V; 한국정밀공학회
• Subjects: Adsorption; Cosmetics; Domestic wastewater; Efficiency; Energy consumption; Energy Efficiency; Engineering; Fourier transforms; Graphene; Heat treatment; Heat treatments; Hydrophobic surfaces; Industrial and Production Engineering; Investigations; Iron oxides; Lasers; Lignin; Magnetic fields; Melamine; Microplastics; Particle size; Plastic pollution; Pollutants; Polyamide resins; Polyamides; Polydimethylsiloxane; Polymers; Polystyrene; Polystyrene resins; Regular Paper; Scanning electron microscopy; Sedimentation & deposition; Spectrum analysis; Sustainable Development; Wastewater treatment; Water treatment; 기계공학; St Louis Missouri; United States > US; Heat treatment; Microplastics; Zeta potential; Laser-induced graphene; Fe; O
• ISSN: 2288-6206; 2198-0810
• DOI: 10.1007/s40684-022-00464-6

Removal of microplastics (MPs), which pose a severe threat to humanity and ecosystems, is essential. Although extensive efforts have been made to efficiently remove MPs, it still remains a difficult task. We fabricated Fe 3 O 4 /laser-induced graphene, by simply irradiating a laser on the surface of a polymer prepared by homogeneously mixing iron oxide, lignin powder, and polydimethylsiloxane, to efficiently remove household-derived MPs. Subsequently, Fe 3 O 4 -laser-induced graphene particles (Fe 3 O 4 -LIGPs) were prepared through scrapping and heat treatment. The Fe 3 O 4 -LIGPs efficiently adsorbed three types of MPs (melamine—particle size: 2 and 10 μm, polystyrene—particle size: 10 μm, polyamide—particle size: 50 μm) within 300 min and could be easily separated from the solution by using magnetic force. The adsorption of the MPs on the Fe 3 O 4 -LIGPs followed the pseudo-first and second-order kinetics and the Freundlich isotherm model. The maximum adsorption capacities of the Fe 3 O 4 -LIGPs for the different types of MPs were 1400 (polyamide, 50 μm), 1250 (polystyrene, 10 μm), 1050 (melamine—10 μm), and 775 (melamine—2 μm) mg∙g −1 . The Fe 3 O 4 -LIGPs were reused seven times for each MP, after heat treatment, and their performance was evaluated. Graphic abstract