Magnetic filtration with magnetized granular beds: Basic principles and filter performance

Abbasov, Teymuraz

doi:10.1016/j.cpart.2007.01.014

Cited by 21 publications

(7 citation statements)

References 24 publications

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“…The mechanism of particle capture in the gradients has been identified from force and momentum balance equations (magnetic and hydrodynamic) in the capture areas (32).…”

Section: Chemicals and Magnetic Size Sortingmentioning

confidence: 99%

“…When placed in an electromagnet, the MACS column matrix creates strong magnetic field gradients retaining magnetic particles according to their global magnetic moments and hence to their sizes. The mechanism of particle capture in the gradients has been identified from force and momentum balance equations (magnetic and hydrodynamic) in the capture areas (32).…”

Section: Chemicals and Magnetic Size Sortingmentioning

confidence: 99%

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Development of magnetic chromatography to sort polydisperse nanoparticles in ferrofluids

Forge

Gossuin

Roch

et al. 2010

Contrast Media & Molecular

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Whatever the strategy of synthesis, nanoparticles in magnetic fluids commonly feature a broad size distribution. However, the presence of several size populations in ferrofluids is often problematic because of the close relationship between the efficiency of the nanoparticles and their physicochemical properties. In this work, a magnetic size sorting procedure is developed in order to reduce this polydispersity, using the magnetic properties of the iron oxide nanoparticles. This magnetic sorting with an adjustable magnetic field allows isolation of the small superparamagnetic particles as well as the larger particles. Magnetometry, nuclear magnetic relaxation dispersion profiles and transmission electron microscopy were successfully used to check the efficiency of the magnetic sorting procedure, which was shown to work as a 'magnetic' chromatography.

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“…The mechanism of particle capture in the gradients has been identified from force and momentum balance equations (magnetic and hydrodynamic) in the capture areas (32).…”

Section: Chemicals and Magnetic Size Sortingmentioning

confidence: 99%

Section: Chemicals and Magnetic Size Sortingmentioning

confidence: 99%

Development of magnetic chromatography to sort polydisperse nanoparticles in ferrofluids

Forge

Gossuin

Roch

et al. 2010

Contrast Media & Molecular

View full text Add to dashboard Cite

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“…The magnetic filtration efficiency depends on several factors such as hydrodynamic, magnetic, rheological, and geometrical parameters of the system and physicochemical properties of a medium (Abbasov 2002(Abbasov , 2007Svoboda 2004;Franzreb and Holl 2000;Sandulyak 1988;Abbasov et al 2011). The main parameter affecting the filter performance is the external magnetic field strength (H ).…”

Section: Introductionmentioning

confidence: 98%

Optimization of the Parameters of the Magnetic Filtration Process Using Response Surface Methodology

Yildiz

2011

Transp Porous Med

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In this study, we aimed at optimizing the parameters which govern the separation efficiency in the magnetic filtration of magnetizable dispersed particles from a water medium. Response surface methodology (RSM) was used to determine the influence of the process parameters. Also, the optimal processing conditions were determined in order to reduce the external magnetic field strength, diameter of the filter matrix elements, and filter length to a safe level. A three-level central composite design (CCRD) involving the variables, such as external magnetic field strength (148-282 kA/m), diameter of the filter elements (0.005-0.011 m), and the filter length (0.01-0.10 m) was developed for this purpose. Data obtained from the RSM was subjected to the analysis of variance (ANOVA) using a second-order polynomial equation, which provided the optimized process conditions as 298 kA/m for external magnetic field strength, 0.0015 m for diameter of the filter elements, and 0.095 m for the filter length. The separation efficiency was optimized for magnetic filtration of micron sized particles that can be magnetized in an external magnetic field and the value was found to be 97%.

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“…The packing elements are usually balls, steel wools, metal rods, and wires. [1,3,7,8,12,13] The local high gradient fields are formed around these packing elements with the effect of the magnetic field. Purification of a liquid or gas is accomplished by passing the suspension and holding the micron-sized magnetic dispersed particles in these areas.…”

Section: Introductionmentioning

confidence: 99%

“…For this reason, electromagnetic filters (EMFs) have become very popular and are often used for the separation of heavy metal ions, phosphates, corrosion products like rusts in mining, glass, ceramic, oil, and nuclear power generation industries. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] The matrix of the EMF is composed of the ferromagnetic packed beds that can be easily magnetized in an external magnetic field. The packing elements are usually balls, steel wools, metal rods, and wires.…”

Section: Introductionmentioning

confidence: 99%

Effect of Some Process Parameters on the Separation of the Dispersed Ferrous Impurities Using Cycled Electromagnetic Filter

Yildiz

Abbasov

Sarımeselı

2010

Journal of Dispersion Science and Technology

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Electromagnetic filters (EMFs) can be effectively used for the cleaning of both industrial and domestic disposals such as waste water having low concentration and micron size of dispersed particles that show magnetic characteristics. In this work, we investigated the effect of some parameters of the filtration process, external magnetic field density, size of the filter matrix elements, filter length, filtration velocity, viscosity of the suspension, and number of the cycle on the separation efficiency of micron-sized particles that can be magnetized in an external magnetic field. It has been found that filtration efficiency decreased with increasing filtration velocity and suspension viscosity. Furthermore, the filter matrix elements geometry, pH value of the medium, and number of the cycling processes affected the cleaning efficiency. Recycling the suspension to the filter body allowed the cleaning process to be made in a smaller filter size with a high quality factor.

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Magnetic filtration with magnetized granular beds: Basic principles and filter performance

Cited by 21 publications

References 24 publications

Development of magnetic chromatography to sort polydisperse nanoparticles in ferrofluids

Development of magnetic chromatography to sort polydisperse nanoparticles in ferrofluids

Optimization of the Parameters of the Magnetic Filtration Process Using Response Surface Methodology

Effect of Some Process Parameters on the Separation of the Dispersed Ferrous Impurities Using Cycled Electromagnetic Filter

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