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Adsorption mechanism of polyethyleneimine modified magnetic core-shell FeO@SiO nanoparticles for anionic dye removal.
RSC Adv
October 2019
College of Environmental Science and Engineering, Hunan University Changsha 410082 P. R. China
Article Synopsis
- The study developed polyethyleneimine modified magnetic core-shell nanoparticles (FeO@SiO/PEI) for removing anionic dyes from water.
- The adsorption of Methyl orange (MO) and Congo red (CR) was influenced by pH, with maximum capacities of 231.0 mg/g at pH 4 for MO and 134.6 mg/g at pH 6 for CR.
- The adsorption followed pseudo-second-order kinetics and the Freundlich isotherm model, primarily driven by electrostatic attraction between the dye molecules and the nanoparticle surfaces.