Abstract: Adsorption of arsenic (V) from aqueous solutions onto natural pozzolan from Djoungo was studied. Experiments were carried out in batch as a function of contact time and pH at a frequency of 7 Hz. Results showed that adsorption equilibrium onto pozzolan was attained in 20 min at the pH studied and kinetics followed a pseudo-second-order model. The experimental isotherm data were analyzed using Freundlich, Langmuir and Redlich-Peterson isotherm equations. In order to determine the best-fit isotherm for each system, non-linear regressions were carried out. For this, Chi-square error was used to evaluate the data. The errors values indicated that the Redlich-Peterson isotherm was able to provide best quality fit for all the experimental data.