Study and Optimization of a High-Gradient Magnetic Separator Using Flat and Lattice Plates

Kheshti, Zeinab; Hassanajili, Shadi; Ghajar, Koorosh Azodi

doi:10.1109/tmag.2018.2883624

Cited by 8 publications

(5 citation statements)

References 28 publications

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“…The design of the magnetic separator system will have to be properly tuned for the following parameters on a case-to-case basis as well: its optimal geometry in relation to aqueous stream flow patterns (Kheshti et al 2019b ), potential flocculation and coagulation behaviors (Lv et al 2019 , 2021 ; Sun et al 2021 ), flow paths (Kakihara et al 2004 ; Tang et al 2014 ) and effects of turbulences and variable fluid shear forces; concentrations and mass loading of magnetic nanoadsorbents (Powell et al 2020 ); the magnetic field strength distributions, flow velocity profiles and liquid streamlines being developed during the magnetic separation; the exposure intensity; effects of any residual magnetization arising from presence of mechanical components (Powell et al 2020 ); colloidal stability and magnetic separability (Hutchins and Downey 2020 ); and residence time distributions with or without effluent recirculation.…”

Section: Developments With Magnetic Nanoadsorbents and Magnetic Separationmentioning

confidence: 99%

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Mudhoo

Sillanpää

2021

Environ Chem Lett

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Pure water will become a golden resource in the context of the rising pollution, climate change and the recycling economy, calling for advanced purification methods such as the use of nanostructured adsorbents. However, coming up with an ideal nanoadsorbent for micropollutant removal is a real challenge because nanoadsorbents, which demonstrate very good performances at laboratory scale, do not necessarily have suitable properties in in full-scale water purification and wastewater treatment systems. Here, magnetic nanoadsorbents appear promising because they can be easily separated from the slurry phase into a denser sludge phase by applying a magnetic field. Yet, there are only few examples of large-scale use of magnetic adsorbents for water purification and wastewater treatment. Here, we review magnetic nanoadsorbents for the removal of micropollutants, and we explain the integration of magnetic separation in the existing treatment plants. We found that the use of magnetic nanoadsorbents is an effective option in water treatment, but lacks maturity in full-scale water treatment facilities. The concentrations of magnetic nanoadsorbents in final effluents can be controlled by using magnetic separation, thus minimizing the ecotoxicicological impact. Academia and the water industry should better collaborate to integrate magnetic separation in full-scale water purification and wastewater treatment plants.

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Section: Developments With Magnetic Nanoadsorbents and Magnetic Separationmentioning

confidence: 99%

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Mudhoo

Sillanpää

2021

Environ Chem Lett

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“…Combinations of MNPs with different forms of mesoporous silica such as MCMs and SBAs have been widely investigated in recent years. [ 12,13 ] There are plenty of reports on the incorporation of magnetic mesoporous for preparing magnetically retrievable supported catalyst in the literature. [ 14,15 ] For example, Tai et al reported the preparation of sulfonic acid‐functionalized magnetic mesoporous silica, which has been used in the esterification of propionic acid.…”

Section: Introductionmentioning

confidence: 99%

A new Pd(II)‐supported catalyst on magnetic SBA‐15 for CC bond formation via the Heck and Hiyama cross‐coupling reactions

Rahimi

Mansoori

Nuri

et al. 2020

Applied Organom Chemis

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Magnetic mesoporous silica composite (MNP@SiO2‐SBA) was obtained via embedding magnetite nanoparticles between SBA‐15 channels. It was silylated with N‐(3‐(trimethoxysilyl)propyl)picolinamide (TMS‐PCA) and then complexed with Pd(II). The obtained supported Pd(II) catalyst (MNP@SiO2‐SBA‐PCA) was characterized by conventional methods. The prepared magnetic catalyst showed high activity in the Heck and Hiyama reactions under optimal reaction conditions, including solvent, amount of catalyst, base, and temperature. Aryl bromides and iodides showed better results than aryl chlorides, and the catalyst exhibited noticeable stability and reused several times.

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“…Bu teori baz alınarak HGMS'lerin taşıyıcı ortamın ideal [13], newtonian-aminer [3,14], reolojik [15] akış rejimlerinde performans karakteristikleri incelenmiştir. Son yıllarda ise mtris elemanları elipsoid kesitli HGMS'lerin teori ve pratiği literatürde geniş olarak incelenmektedir [16][17][18][19][20]. Birçok durumlar için, özellikle tıp ve biyolojik işlemlerde taşıyıcı ortamların matris elemanları ile temassız akışı oluşturulan HGMS sistemlerinin kullanılması daha avantajlıdır.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Mıknatıslanmış Granül Dolgulu Yataklarda Submikron Parçacıklarının Yakalanması

Karadağ

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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The diffusion separation of micron and submicron sized particles was examined theoretically in the gradient magnetic field formed by tangent ferromagnetic spheres magnetized in external homogeneous magnetic field. In the gradient field around the tangent points of the magnetized spheres, the analytical solution of the diffusion equation for steady states is obtained by using the expression of the magnetic force acting on the submicron-sized particle. The concentration distribution of the particles in these regions was calculated.. a) Fe3O4 particles b) Mn 2 P 2 O 7 , CuO particles Figure A. Changes of the critical dimensions of the sunmicron particles held around the tangent points of the magnetized ferromagnetic spheres according to the magnetic field strength Purpose: In this article, the retention of micron and submicron particles in the gradient magnetic field formed by ferromagnetic spheres magnetized by the external homogeneous magnetic field was investigated by the diffusion approach. The analytical solutions of the diffusion equation for steady states were obtained, and the distribution profile of the concentration of the particles was determined in the gradient magnetic field. The critical dimensions of the particles were evaluated to hold the ferromagnetic spheres around their tangent points. Theory and Methods: The basic principle of high gradient magnetic separation (HGMS) and filtration (HGMF) processes is to retain these particles by applying effective magnetic force () to micron-sized, magnetic properties particles in the high gradient magnetic field, or separate the external homogeneous magnetic field from high gradient magnetic fields in HGMS systems. They are formed around ferromagnetic materials (sphere, wire, rod, metal shavings, metal wool, etc.) magnetized by the effect of (H). Results: In Figure A, the changes in the critical dimensions of the particles held in the magnetic field with the gradient formed by the magnetized spheres are shown according to the magnetic field intensity. This relationship is calculated according to equations. The critical size of the particles trapped decreases with increasing outer magnetic field intensity. But in this case, it is important that the particles are single-domain or multi-domain. Conclusion: The diffusion equation of the micron and submicron particles in matrix elements formed from magnetized ferromagnetic spheres has been investigated. Analytical solutions for steady states of the diffusion equation in the high gradient magnetic field formed around the tangent points of the magnetized spheres were obtained.

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Study and Optimization of a High-Gradient Magnetic Separator Using Flat and Lattice Plates

Cited by 8 publications

References 28 publications

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

A new Pd(II)‐supported catalyst on magnetic SBA‐15 for CC bond formation via the Heck and Hiyama cross‐coupling reactions

Mıknatıslanmış Granül Dolgulu Yataklarda Submikron Parçacıklarının Yakalanması

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