Equilibrium and Kinetic Modeling for the Biosorption of Reactive Red 120 By Ludwigia Peploides Biomass

Abstract

Biosorption of Reactive Red 120 from an aqueous solution using Ludwigia peploides biomass was investigated. Biosorbent dosage (0.2 to 1.0 g/L), initial solution pH ( 1-7) and initial dye concentration ( 15 to 110 mg/L) for the maximum uptake of dye removal by L. peploides was studied. The maximum dye uptake capacity was found to be 132 mg/ g at an initial dye concentration of 110 mg/L. Equilibrium data were analyzed by Langmuir and Freundlich adsorption isotherm. Freundlich model fitted very well for equilibrium data obtained. Kinetics data fit well with pseudo-second order when compared to pseudo-second order models. The functional groups present in the L. peploides were analyzed by FTIR spectra. The surface morphology of the L. peploides biomass was analyzed by scanning electron micrograph.