Clay–Magnetite Co-Aggregates for Efficient Magnetic Removal of Organic and Inorganic Pollutants

This work reports the behavior of montmorillonite–magnetite mixtures varying composition in aqueous dispersions and evaluates their adsorbing properties using a cationic organic pollutant, methylene blue (MB+), an anionic inorganic arsenate (As(V)), as species. The effects presence montmorillonite on As(V) adsorption by magnetite MB+ clay were specially addressed. simple mixture dispersion with led to spontaneous formation co-aggregates. These co-aggregates showed unimodal electrophoretic mobility distribution, no evidence separate populations or magnetite. application magnetic field confirmed that separation rate increased content increased. Adsorption studies function aggregate demonstrated uptake was mainly controlled montmorillonite, while Fe3O4. permits easy tuning cations anions controlling system.