Abstract
The objective of this study is to separate dyes in wastewater with high efficiency and speed using High Gradient Magnetic Separation with superconducting magnet. Two main technologies are necessary for magnetic separation; one is magnetic seeding technology to provide ferromagnetism to the substance, and the other is magnetic separation technology using superconducting magnet and magnetic filters. In order to separate organic dyes, it is necessary to clarify the mechanism of magnetic seeding, and to design a suitable magnetic seeding method depending on the kind of object dye. Six kinds of dyes which are widely used in industry were adopted to investigate the possibility of the magnetic seeding and interaction mechanism between dye and ferromagnetic particles. As a result, it was shown that electrostatic interaction is one of the main interactions between organic dye and ferromagnetic particles.
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