Adsorption study for the Removal of Hazardous Dye Congo Red by Biowaste Materials as Adsorbents

ABSTRACT The present work aims to investigate the removal of dye Congo red from aqueous solution by using Green Peas Shell (GPS) low-cost biowaste adsorbent under various experimental conditions. The effect of contact time, temperature, pH, dye concentration, and adsorbent dose on the removal of Congo red dye was studied. The adsorption study reveals that Congo red has the affinity to get adsorbed on to the surface of GPS. Equilibrium isotherms were analyzed by Langmuir, Freundlich isotherm described the isotherm data with high-correlation coefficients. The results of the present study substantiate that GPS biowaste material is promising adsorbent for the removal of the dye Congo red.