Synthesis and Application of Magnetic Nanoadsorbent in Removal of Toxic Metals from Aqueous Solution

Magnetic nano adsorbent is cost-effective and easily synthesized in the laboratory by chemical Co-precipitation method that provides not only high adsorption capacity but also rapid adsorption rate. The magnetic nano adsorbents were synthesized by Ferric and Ferrous ions precursor solution in the presence of ammonium hydroxide. In the present investigation, a magnetic nano adsorbent has been employed for the removal of Pb (II) from an aqueous solution by batch adsorption technique along with photocatalysis. The different parametric study also carried out such as initial concentration of Pb (II), adsorbent dose, contact time, and Solution pH. The Pb (II) was fast adsorption and the equilibrium was achieved within ۴۵ minutes. The amount Pb (II) adsorbed increases as the temperature increase. The optimal pH for Pb (II) was around ۵.۴ and for the removal of Pb (II) ions was up to ۹۶.۰۰%. The employed adsorbents were characterized by SEM, X-ray diffraction (XRD), Vibrating spinning magnetometer (VSM), and FTIR. The Kinetic of adsorption study was examined for the pseudo-first-order model and pseudo-second-order models. This Photocatalytic adsorption study obeys Pseudo second-order kinetic. The reusability and regeneration of magnetic nano adsorbents were studied and were recycled up to ۸۷.۰۰ %.

Keywords:

Ferric and Ferrous ions , co-precipitation , Magnetic Nanoadsorbent , Adsorption , VSM , Photocatalysis , Kinetics