It was found that a HBCT-8 resin well separated succinic acid and lactic acid.On the basis of the selected adsorbent,the single-component adsorption Equilibration of succinic acid and lactic acid were measured using a staircase frontal analysis method at the liquid-phase concentrations up to 10 g/L.The adsorption data were correlated with the Langmuir and the bi-Langmuir adsorption models.The effect of temperature on the Langmuir and bi-Langmuir equilibrium constants was examined.The acid adsorption reaction on HBCT-8 was exothermic.This temperature effect was incorporated into each model equation.The temperature-dependent form of the model equation can accurate predict the adsorption equilibrium at 30 to 50 ℃.The adsorption equilibrium data and the model parameters reported in this study will be of great value in designing SMB process that is packed with the HBCT-8 resin and targeted at separating succinic acid and lactic acid.