J Jeyanthi
Government College of Technology, Coimbatore, India
Title: Synthesis and characterisation of cobalt ferrite [CoFe2O4] and manganese ferrite [MnFe2O4] nanoparticles for the adsorption of lead, zinc and Congo red dye from aqueous solutions
Biography
Biography: J Jeyanthi
Abstract
The present study involves the applicability of cobalt ferrite and manganese ferrite nanoparticles as an adsorbent for the removal of lead, zinc and Congo red dye from the aqueous solution. The nanoparticles were synthesized by co-precipitation method by incorporating chlorides and sulphates of respective metal ions with sodium hydroxide as pH stabilizer. The point of zero charge for cobalt ferrite and manganese ferrite nanoparticles were estimated by solid addition method and were found to be 9.3 and 6.1 respectively. The synthesized nanoparticles was characterized using X-Ray diffraction, scanning electron microscope with EDAX, transmission electron microscope, vibrating sample magnetometer, Fourier transform infrared spectroscopy and surface area analyzer. X-Ray diffraction and transmission electron microscope studies confirm the formation of single phase cobalt ferrite nanoparticle by showing more crystalline in its alkaline condition. From the X-ray diffraction studies, the size of the cobalt ferrite nanoparticles was found to be in the range 52.87 nm to 60.18 nm while for manganese ferrite nanoparticles the size was found to be in the range 15.82 nm to 17.35 nm. From the transmission electron microscope studies, the size of cobalt ferrite nanoparticles was found to be in the ranges of 16-49 nm and for manganese ferrite nanoparticles, the size was observed to be in the range of 40-200 nm for manganese ferrite nanoparticles respectively. The scanning electron microscope studies reveal that the structure of the nanoparticles were agglomerated and the particles were circular and elongated in shape in the case of cobalt ferrite and mangansese ferrite nanoparticle. VSM studies exhibited the magnetic properties of both the nanomaterials with the help of a soft magnet which indicated the formation of lean loop. FTIR studies reveal the formation of cobalt ferrite and manganese ferrite nanoparticles indicating the presence of relevant functional groups. The adsorption process control parameters were optimised and adsorptive capacity of nanomaterials were predicted through kinetic and isotherm modelling.