Fig. 8From: Orange peel as low-cost adsorbent in the elimination of Cd(II) ion: kinetics, isotherm, thermodynamic and optimization evaluationsPlots of Qe versus Ce for Langmuir, Freundlich and D–R adsorption isotherms for the adsorption of cadmium(II) by OP at initial metal concentration of 250 mg/L, pH of 5.5 and temperature of 45 °CBack to article page