Removal of Cd(II) ion from aqueous solution using magnetic ionic liquid based nanocomposites [NiFe2 O4 @BMSI]Br: kinetics, isotherm and thermodynamic studies

Abstract

The pollution of soil and water recourses by toxic metals is a serious global problem, and it is challenging to eradicate their long-standing effects. Several techniques have been widely used for water treatment. Among all available techniques, adsorption is one of the most promising techniques for the treatment of wastewater due to its simplicity of design, ease of operation and no secondary pol-lution. The current study presents the results of adsorption studies on Cd(II) removal from aqueous solution using a magnetic ionic liquid based nanocomposites [NiFe2 O4 @BMSI]Br. The optimum pH was noted 7 and equilibrium was attained within 180 min. The experimental equilibrium data for Cd(II) adsorption using [NiFe2 O4 @BMSI]Br nanocomposite was well fitted to the pseu-do-first-order kinetic and Langmuir isotherm models. Thermodynamic studies showed that Cd(II) adsorption using [NiFe2 O4 @BMSI]Br was endothermic and spontaneous process.