SYNTHESIS OF CYSTEINE COATED.FERRITE NANOPARTICLES - STUDY OF ADSORPTION OF CERTAIN HAZARDOUS METAL IONS ON THEIR SURFACE

Abstract

in the present work we have synthesized Fe304 and cysteine coated - Fe304 by co-precipitation process and characterized them by XRD, FE-SEM, AFM, TEM, FT-IR, UV-VIS, TGA-DTADTG, Zeta-probe and VSM techniques. The particle size of cysteine coated - Fe304 was estimated at about 12 nrn and was supported by SEM, AFM and TEM studies. TEM study indicates that in the cysteine coated - Fe304 nanoparticles are present in the core. The coating of cysteine also indicates by EDAX analysis in FE-SEM, FT-IR and UV-Visible spectroscopy. Zeta probe shows the negative charge on coated nanoparticles. Both Fe304 and cysteine coated - 7- Fe3O4 exhibit superparamagnetic behavior and the magnetization (emu/g) of the coated particles is decreased to 66.8 emu/g as compare to 74.1 emu/g for the bare Fe304 nanoparticles. As synthesize cysteine coated - Fe304 nanoparticles were used for the adsorption of environmentally toxic Pb'2. Capacity of adsorption of Pb 2 was estimated at 33.5 mg/g and the metal recovery could be achieved up to 82.5 ± 7.5 %. This system could be utilized for the removal of other toxic ions as well