Silver nanoparticles doped slaked lime as adsorbent for the removal of basic dyes

Abstract

A new eco-friendly green synthesized silver nanoparticles doped slaked lime was developed as an adsorbent for the removal of basic dyes from aqueous solution. Silver nanoparticles were synthesized through a green route using pomegranate peel and doped with slaked lime. Its applicability in removing basic green 4 dye from aqueous solution was evaluated in a batch process. The effect of control variables such as initial dye concentration, adsorbent dose, pH, agitation time and temperature on the removal of basic green 4 by silver doped slaked lime was analyzed. The experimental data were fitted to classical isotherms such as Langmuir, Freundlich and Temkin. The reaction kinetics was examined by interpreting the equilibrium data using pseudo first order, pseudo-second order and intraparticle diffusion equations. The thermodynamic data were examined for feasibility in the potential application on an industrial scale. These studies have proved that rate of adsorption of basic green 4 is excellent and rapid on silver nanoparticles doped slaked lime in which silver nanoparticles induce a local dipole field that enhances adsorption of dye molecules on a rapid scale.