Magnetic filtration

Another class of solvents that appears to have significant appeal for green processing of metal waste solutions relies on solvent-coated magnetic particles dispersed within the feed phase to be treated (Nunez et al., 1996). Once the desired solutes have been removed by extraction, these particles can be recovered conveniently using magnetic filtration. 

Removal of magnetic impurities from industrial wastewater is called magnetic filtration, eg, reconditioning of boiler water and regeneration of condensate in power plants. Sec also Electromagnetic Separation Magnetic Materials and Mass Spectrometry. 

To construct the magnetic filtration set up, the magnetic filter is installed in a conduit system through which buffer is pumped by means of a peristaltic pump (Fig. 1). 

Selected Examples of the Technological Use of the Magnetic Filtration and Coagulation Principle... 

An Illustrative List of Devices and Apparata Used in Magnetic Filtration and Coagulation... 

In addition, smaller particles can be easily fluidized, thus increasing mass-transfer rates. The challenge is to have particles that are sufficiently small to take advantage of the high surface area and mass-transfer rates but large enough to be easily separated by magnetic filtration. 

One important objective of trajectory analysis is to determine the limiting trajectory and thus the critical radius of particle capture. As shown in Fig. 3.7-2, the limiting trajectory is defined as the exact path that divides the particle trajectories into those leading to capture by the collector and those passing by the collector. The distance between the limiting trajectory and the axis is then defined as the critical radius (R ), which can be used to determine the removal efficiency of magnetic filtration (Watson, 1973) ... 

Magnetic filtration Producing fine high quality feed-stocks... 

Magnetic filtration shows potential for primary separation of nanometer iron catalyst from F-T wax and has achieved very high throughputs when compare to more conventional methods. 

Kohaupt U., 2005. Filtration of fine particles by high gradient magnetic filtration. Filtration, 5(1), 48-50. 

An important feature of this procedure is that addition of the enzyme to the reaction mixture during the formation of the gel minimizes enzyme deactivation. Furthermore, covalent incorporation of the enzyme into the gel provides some protection against proteases. Second, the procedure is simple and of general use and should be directly applicable to a variety of enzyme systems as well as immobilization of whole cells and organelles. Finally, the gel can be rendered susceptible to magnetic filtration by including a ferrofluid in the gel formation step. 

Cs" and promote its separation from aqueous solutions. The nanoparticles loaded with the ions can be readily removed from the solution by magnetic filtration and further concentrated by evaporation. 

Liu et al., 2001). The magnetic microbeads coated with anti-Salmonella were used to separate Salmonella from sample solutions at room temperature for 30 min. A sandwich complex with alkaline phosphatase and the Salmonella immobilized on the magnetic beads was formed, separated fixam the solution by a magnetic filtration, and incubated with a p-nitrophenyl phosphate substrate at 37 °C for 30 min to produce p-nitrophenol by enzymatic hydrolysis. Salmonella was detected by measuring the absorbance of p-nitrophenol at 404 nm, with a hnear response of 2.2—104 and 2.2—106 CPU mL... 

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