SDS-Modified Iron Oxide Magnetic Nanoparticles for Removing of Methylene Blue from Aqueous Solution

It is shown that surface-modified magnetic iron oxide nanoparticles with an average size of about 10 nm have a high adsorption capacity for the sorption of pollutants from wastewater. A considerable advantage of using magnetic materials is their ability to extract the sorbent using an external magnetic field, making the purification process more efficient. It is found that anionic sodium dodecyl sulfate increases the electrostatic attraction to the cationic compound Methylene Blue, preventing the aggregation of nanoparticles and increasing the active surface. The sorption capacity of magnetic nanoparticles after surface functionalization grew by a factor of 250, relative to unmodified iron oxide nanoparticles. The mechanism and kinetic parameters of sorption are determined, along with the optimum conditions for increasing the efficiency of the sorption process.