Efficient Removal of Cr (VI) from Aqueous Solution with PPy-Fe3O4 Nanocomposite

Abstract

Polypyrrole-magnetite (PPy-Fe3O4) nanocomposite (NC) was synthesized, characterized and tested for its ability to remove hexavalent Cr (VI) from aqueous solution. X-ray diffraction (XRD) analysis showed crystalline structure in the NC while magnetic measurements revealed super-paramagnetic properties. Batch adsorption kinetic studies indicated a strong influence of quantity of Fe3O4 and initial Cr (VI) concentration to the sorption capacity. Kinetic data fitted well to pseudo-second order kinetic model suggesting a chemisorption process. Finally, both intra-particle and film diffusion mechanisms controlled the adsorption process.