Effective separation of magnetite nanoparticles within an industrial-scale pipeline reactor

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

“…In a recent insightful work which highlights the merits of cooperative magnetophoresis, an in-line, wastewater-cooled electromagnetic collection system has been developed (Hutchins and Downey 2020 ). This new system could produce collections at very high efficiencies consistently more than 98% (with a magnetic core of 200 wires (Core I)) when paired with magnetite nanoparticles because of the intimate contact induced when placing the coil directly in the copper(II)-containing wastewater flow (Hutchins and Downey 2020 ).…”

“…In a recent insightful work which highlights the merits of cooperative magnetophoresis, an in-line, wastewater-cooled electromagnetic collection system has been developed (Hutchins and Downey 2020 ). This new system could produce collections at very high efficiencies consistently more than 98% (with a magnetic core of 200 wires (Core I)) when paired with magnetite nanoparticles because of the intimate contact induced when placing the coil directly in the copper(II)-containing wastewater flow (Hutchins and Downey 2020 ). The water cooling feature of the electromagnetic collection system enabled the onset of a much more powerful magnetic field that, in turn, tends to allow the use of pipes with larger diameters and accommodate flows at higher fluid velocities (Hutchins and Downey 2020 ).…”

“…This new system could produce collections at very high efficiencies consistently more than 98% (with a magnetic core of 200 wires (Core I)) when paired with magnetite nanoparticles because of the intimate contact induced when placing the coil directly in the copper(II)-containing wastewater flow (Hutchins and Downey 2020 ). The water cooling feature of the electromagnetic collection system enabled the onset of a much more powerful magnetic field that, in turn, tends to allow the use of pipes with larger diameters and accommodate flows at higher fluid velocities (Hutchins and Downey 2020 ). The latter are two important requisites for an effective industrial-scale application of a magnetic separation system.…”

“…The latter are two important requisites for an effective industrial-scale application of a magnetic separation system. Interestingly, flows of up to 8.1 L min –1 with up to 80 gram-particles could produce the target benchmark collection efficiency of 98% (Hutchins and Downey 2020 ). However, the decrease in collection efficiencies for particles of greater masses was attributed to the excess build-up of particles on the core wires, and at a specific point in this fluid-velocity-dependent build-up, the fluid drag force becomes greater than the magnetophoretic force, and the magnetite particles are carried into the flow (Hutchins and Downey 2020 ).…”

Impact of Nanoscale Magnetite and Zero Valent Iron on the Batch-Wise Anaerobic Co-Digestion of Food Waste and Waste-Activated Sludge

“…On the one hand, improved methane production efficiency implies increased revenues from the elevated generation of power and heat energy. Moreover, the fact that magnetite NPs are inexpensive to produce [69,70] and can be effectively separated and reused [71] will only limitedly increase the operational costs. On the other hand, realizing effective industrial implementation necessitates a detailed economic analysis that requires further technical and scientific research to specify critical technical information, such as the maximum endurable organic loading rates, and optimum magnetite NP dose, both determined according to substrate characteristics and operating conditions.…”