The present work investigates the potential use of biosorbent prepared from seeds of Polyalthia longifolia commonly called as Ashok for the removal of acetic acid from aqueous solution. The effect of temperature on the removal of acid at different initial concentrations at its original pH was studied by batch method. At a constant temperature, adsorption from a solution solid system depends upon concentration of solution, provided the nature and amount of adsorbent is kept constant. The batch adsorption studies of acetic acid have been carried out at (30, 40 and 500C) different temperatures. The experimental data have been evaluated using Freundlich and Langmuir isotherm model. The linear plots obtained shows applicability of Freundlich and Langmuir isotherms. Maximum adsorption has been found to be 29.4 % at 30 0C for lower concentration at 0.100 gm adsorbent dose. The maximum adsorption capacity (Q0) was found to be 48.07 mg/gm at 400C.