Batch adsorption studies for malachite green dye removal from waste water using biomass based adsorbent

Abstract

Adsorption of malachite green dye over the adsorbents (Ad) derived from Sapindus seed hull (S) and Camelina (C) after treatment with sulphuric acid is studied. Batch adsorption study on both Ad is compared as a function of various parameters such as pH, time, initial concentration and temperature. The isotherm data is found to be best presented by Langmuir model for both adsorbents. Separation factor (R_L) revealed a favorable adsorption. Further, the rate of adsorption followed pseudo-first order kinetics. The intraparticle diffusion model facilitates to understand mass transfer in adsorption of dye molecules. Thermodynamic analysis on both Ad revealed the spontaneity of the phenomena at higher temperature. The comparative study illustrated higher adsorption capacity of CAd in comparison to SAd