Synthesis, Characterization, and Adsorptive Properties of Polyaniline@MFe2O4 (M: Mg, Mn, Ni) Magnetic Nanocomposites

This paper used three magnetic adsorbents, including , , and to remove congo red dye. The synthesized nanocomposites were identified using SEM, XRD, EDX, and FT-IR methods. Then the factors affecting the removal efficiency of congo red were optimized for all three adsorbents. Under optimum conditions, the removal efficiencies of congo red from aqueous media by , , and were calculated as 92, 90 and 89 %, respectively. The reusability of the used nanocomposites was investigated, so 1 M HCl as a recovery agent could recover up to 4 times all three nanocomposites. The synthesized sorbents performed the removal of congo red from real samples, including well water and dyeing wastewater. The results showed that the matrix does not significantly affect the efficiency of the nanocomposites so that they could be used in real samples with complex matrices.