Batch and column mode adsorption studies of Reactive red 195 dye using Adenanthera paronina L seed activated carbon

Abstract The adsorptive removal of textile dye (Reactive Red 195) was investigated using a novel activated adsorbent prepared from the seeds of Adenanthera paronina L. Five different varieties of activated carbon were prepared by altering the conditions for the process. The surface characteristics of the five carbon materials were analysed using SEM, FTIR and other physico-chemical parameters. The BET surface area of the AC’s varied between 446 and 948 m2/g. One adsorbent (APAC5) with a BET surface area of 948 m2/g was selected for the adsorption studies under batch and column mode. The adsorbent APAC5 has the ability to remove 64.42 and 82.35 mg/g of RR195 dye (initial concentration of 75 mg/L) under batch and column mode respectively. The nonlinear form of kinetic and isotherm models give better results than the linearized models. The nonlinear pseudo-first order kinetic model best suited with high r2adj value (0.806