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المؤلفون: Iuliia Bakhteeva, Medvedeva, Irina, Filinkova, Marina, Byzov, Ilia, Uimin, Mikhail, Tseitlin, Evgeny
مصطلحات موضوعية: microplastics, preconcentration, magnetic sedimentation, aqueous suspensions, nanoparticles
الوصف: The accumulation of plastic waste in the world's oceans is a growing public concern, under the action of water and solar radiation, the macroscopic plastic objects break down into micro- and nano-sized particles. The amount of microplastics in natural waters is currently unknown because of the difficulties of their quantification in water. It is proposed to use the method of the preconcentration of micro- and nanoplastic particles in water using two main approaches, such as the addition of composite magnetic nanoseeds that form aggregates with detectable plastic particles, and the subsequent separation of these hetertoaggregates from water by magnetic separation. In order to concentrate polyethylene (PE, 20-100 μm) and polyethylene terephthalate (PET, 10-20μm) particles from water, the magnetic Fe-C-NH2 nanoseeds (10 nm) were added to the water, afterward, the magnetic sedimentation of the formed heteroaggregates in a gradient magnetic field was conducted. The effect of magnetic nanoparticles concentration in suspension, the time expose for the heteroaggregation on the efficiency magnetic preconcentration have been investigated.
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::26094fd4e869f35c296a20b2b9adbcd2
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المؤلفون: Iuliia Bakhteeva, Marina S. Filinkova, Mikhail A. Uimin, S. V. Zhakov, Ilia V. Byzov, A. E. Yermakov, Irina Medvedeva
المصدر: Separation and Purification Technology. 218:156-163
مصطلحات موضوعية: Flocculation, Materials science, Sedimentation (water treatment), Tio2 nanoparticles, Composite number, Nanoparticle, Filtration and Separation, 02 engineering and technology, 021001 nanoscience & nanotechnology, Analytical Chemistry, Magnetic field, 020401 chemical engineering, Chemical engineering, Phase (matter), Fe based, 0204 chemical engineering, 0210 nano-technology
الوصف: A new approach to remove TiO2 nanoparticles from water is studied. Composite Fe3O4-SiO2 and Fe-C-SO3H nanoparticles with magnetic cores (5 nm) were designed to be used as flocculants for magnetic sedimentation of nonmagnetic TiO2 nanoparticles in water. The sedimentation dynamics of heterogeneous water suspensions (starting solid phase concentration of 100 mg/l) of (TiO2)1−x(Fe3O4-SiO2)x (x = 0.15–0.55) and (TiO2)1−x(Fe-C-SO3H)x (x = 0.01–0.17) was studied in a gradient magnetic field (B = 0.3 T, dB/dz
