Abstract
Magnetic porous microspheres are widely used in modern wastewater treatment technology due to their simple and quick dye adsorption and separation functions. In this article, we prepared porous polymethylmethacrylate (PMMA) microspheres by the seed-swelling method, followed by in situ formation of iron oxide (Fe3O4) nanoparticles within the pore. Then, we used diazo-resin (DR) to encapsulate the porous magnetic microspheres and achieve PMMA@Fe3O4@DR magnetic material. We studied the different properties of magnetic microspheres by different dye adsorption experiments before and after the encapsulation and demonstrated that the PMMA@Fe3O4@DR microspheres can be successfully used as a reusable absorbent for fast and easy removal of anionic and aromatic dyes from wastewater and can maintain excellent magnetic and adsorption properties in harsh environments.
Highlights
Magnetic nanoparticles are currently being actively investigated because of their extensive applications, such as in magnetic imaging [1], biological separation [2], drug release [3], and water purification [4]
The magnetic field was created by a superconducting solenoid in the persistent mode, and the hysteresis loop was recorded in the field up to 4.5 kOe
The results showed that 90% rhodamine B (RB) could be rapidly removed after the first cycle
Summary
Magnetic nanoparticles are currently being actively investigated because of their extensive applications, such as in magnetic imaging [1], biological separation [2], drug release [3], and water purification [4]. Magnetic porous microspheres have many applications in modern wastewater treatment technology due to their simple and quick dye adsorption and separation functions [16,17,18,19,20,21,22,23]. It is a very useful way of refining the purification of hard materials, such as protein [24]. Compared with PMMA@Fe3 O4 magnetic microspheres, the DR encapsulated counterparts exhibit better stability
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