Authors : G.P. Kofa, S. Ndi Koungou, G.J. Kayem and R. Kamga
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.
G.P. Kofa, S. Ndi Koungou, G.J. Kayem and R. Kamga, 2013. Kinetics and Adsorption Isotherms of Arsenic (V) onto Natural Pozzolan. Journal of Engineering and Applied Sciences, 8: 97-103.