RODICA ELENA PATESCU, CLAUDIA MARIA SIMONESCU, CRISTIAN ONOSE, TEODOR LAURENTIU BUSUIOC, DAIANA ELENA PASARICA, CARMEN DELEANU SIMULTANEOUS REMOVAL OF LEAD AND NICKEL IONS FROM AQUEOUS SYNTHETIC SOLUTIONS BY CHITOSAN COATED COBALT FERRITE This research study deals with lead and nickel simultaneous removal from aqueous solutions by the use of chitosan coated cobalt ferrite as adsorbent. Batch removal tests were performed in order to establish the main parameters that influence the sorption capacity, removal efficiency and the selectivity of this adsorbent. The values of sorption capacity for lead and nickel experimentally determined are: 56.23 mg/g and respectively 45.11 mg/g. Langmuir and Freundlich adsorption isotherms were used to interpret the sorption experimental data. The kinetic data were explored by pseudo-first order, pseudo-second order and intraparticle diffusion kinetic models. The experimental data were well fitted with the pseudo-second order model for both heavy metals. The main conclusion that can be drawn from this research is that this material can be successfully used for the removal of lead and nickel from binary aqueous solutions and wastewater.
Keywords: lead and nickel removal, chitosan coated cobalt ferrite, lead and nickel sorption