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Testing an Iron Oxide Nanoparticle-Based Method for Magnetic Separation of Nanoplastics and Microplastics from Water

Martin, Leisha M A ; Sheng, Jian ; Zimba, Paul V ; Zhu, Lin ; Fadare, Oluniyi O ; Haley, Carol ; Wang, Meichen ; Phillips, Timothy D ; Conkle, Jeremy ; Xu, Wei

Nanomaterials (Basel, Switzerland), 2022-07, Vol.12 (14), p.2348 [Peer Reviewed Journal]

Switzerland: MDPI AG

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Title:
Testing an Iron Oxide Nanoparticle-Based Method for Magnetic Separation of Nanoplastics and Microplastics from Water
Author: Martin, Leisha M A ; Sheng, Jian ; Zimba, Paul V ; Zhu, Lin ; Fadare, Oluniyi O ; Haley, Carol ; Wang, Meichen ; Phillips, Timothy D ; Conkle, Jeremy ; Xu, Wei
Subjects: Adsorbents ; Adsorption ; Coatings ; Contact angle ; Drinking water ; Electron microscopy ; Fourier transforms ; Green chemistry ; hydrophobic coatings ; Hydrophobicity ; interparticle interactions ; iron oxide nanoparticles ; Iron oxides ; Laboratories ; Light diffraction ; Light scattering ; Magnetic measurement ; Magnetic separation ; Magnetization ; Microplastics ; Nanoparticles ; nanoplastics ; Permanent magnets ; Photon correlation spectroscopy ; Plastic debris ; Plastic pollution ; Polydimethylsiloxane ; Polymers ; Scanning electron microscopy ; Sediments ; separation science ; Superconducting quantum interference devices ; Synthesis ; Transmission electron microscopy ; Wastewater ; Water analysis ; Water pollution ; Water purification ; Water sampling ; X-ray diffraction ; Zeta potential
Is Part Of: Nanomaterials (Basel, Switzerland), 2022-07, Vol.12 (14), p.2348
Notes: Present address: PVZimba, LLC, 1241 Percival St., Chester, VA 23831 USA.
Description: Nanoplastic pollution is increasing worldwide and poses a threat to humans, animals, and ecological systems. High-throughput, reliable methods for the isolation and separation of NMPs from drinking water, wastewater, or environmental bodies of water are of interest. We investigated iron oxide nanoparticles (IONPs) with hydrophobic coatings to magnetize plastic particulate waste for removal. We produced and tested IONPs synthesized using air-free conditions and in atmospheric air, coated with several polydimethylsiloxane (PDMS)-based hydrophobic coatings. Particles were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), superconducting quantum interference device (SQUID) magnetometry, dynamic light scattering (DLS), X-ray diffraction (XRD) and zeta potential. The IONPs synthesized in air contained a higher percentage of the magnetic spinel phase and stronger magnetization. Binding and recovery of NMPs from both salt and freshwater samples was demonstrated. Specifically, we were able to remove 100% of particles in a range of sizes, from 2-5 mm, and nearly 90% of nanoplastic particles with a size range from 100 nm to 1000 nm using a simple 2-inch permanent NdFeB magnet. Magnetization of NMPs using IONPs is a viable method for separation from water samples for quantification, characterization, and purification and remediation of water.
Publisher: Switzerland: MDPI AG
Language: English

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Testing an Iron Oxide Nanoparticle-Based Method for Magnetic Separation of Nanoplastics and Microplastics from Water

Martin, Leisha M A ; Sheng, Jian ; Zimba, Paul V ; Zhu, Lin ; Fadare, Oluniyi O ; Haley, Carol ; Wang, Meichen ; Phillips, Timothy D ; Conkle, Jeremy ; Xu, Wei

Switzerland: MDPI AG

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