Coir pith activated carbon for the removal of dyes from aqueous solutions

Abstract

Adsorption of methylene blue, malachite green and nylosan blue dyes onto carbonized coir pith from aqueous solutions was studied. Adsorbent was prepared by carbonizing coir pith at 700 C for l hr. Batch experiments showed that solution pH and adsorbent dose affects the adsorption capacity. The adsorption capacity was highest at solution pH 2 for nylosan blue and above pH 5 for methylene blue and malachite green. The kinetic data fits to second order model. The equilibrium data were satisfactorily fitted to Freundlich isotherm.