The adsorption of Rhodamine-B (RhB) onto treated rice husk-based activated carbon was investigatedin this paper. The influences of initial RhB concentration, temperature and pH on dye adsorption wereanalyzed. Initial RhB concentration and temperature played important roles in this adsorption process,and pH had a little effect on RhB adsorption. Adsorption kinetics, equilibrium and thermodynamics studywas carried out. Results demonstrated that pseudo-second order kinetic model represented the adsorp-tion kinetics of RhB well. Adsorption equilibrium data were well described by Langmuir isotherm model.Thermodynamic parameters, including the Gibb’s free energy change (G), standard enthalpy change(H) and standard entropy change (S), revealed that this adsorption process was spontaneous andendothermic.© 2014 Elsevier B.V. All rights reserved.1.