A novel
magnetic nanoadsorbent has been synthesized by the covalent
immobilization of thiosalicylhydrazide on the surface of Fe3O4 nanoparticles. Size, structure, magnetic property,
and porosity of the prepared magnetic nanoparticles (MNPs) were studied
by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy
(XPS), atomic force microscopy (AFM), transmission electron microscopy
(TEM), vibrating sample magnetometer (VSM), Fourier transform infrared
spectroscopy (FT-IR), and X-ray diffraction (XRD) analysis. The ability
of the prepared MNPs for removing heavy metals ions (Pb2+, Cd2+, Cu2+, Zn2+, and Co2+) from industrial wastes was studied, and the effects of different
affecting parameters on the adsorption characteristics of the modified
MNPs were investigated. The maximum adsorption capacities of Pb2+, Cd2+, Cu2+, Zn2+, and
Co2+ were found to be 188.7, 107.5, 76.9, 51.3, and 27.7
mg g–1, respectively. Excellent adsorption capacity
of the modified nanoadsorbent together with other advantages such
as reusability, easy separation, environmentally friendly composition,
and freedom of interferences of alkaline earth metal ions make them
suitable adsorbents for removal of heavy metal ions from environmental
and industrial wastes.
