Magnetic nanoparticles in wastewater treatment

Abstract Magnetic nanoparticles (MNPs) are suitable candidates for wastewater treatment processes, including flocculation, demulsification, adsorption, filtration, and photocatalytic activities, because their magnetic properties make treatment easy and unique. The use of an external magnetic field makes possible the removal of contaminants from the solution in an efficient and facile manner. This chapter covers water treatment processes based on MNPs, and studies different types of MNPs, their synthesis routes, pollutants they can remove, and their particular uses in separation, filtration, and membrane-based processes. The future ahead of MNPs usage in wastewater treatment and challenges in the field are discussed.