Abstract & Overview
The aim of this study is to evaluate the applicability of adsorption models for understanding adsorption properties of adsorbents.For this study, the adsorption charateristics of NO3-by commercial anion exchange resin, PA-308, were investigated in bach process.The adsorption kinetic data for NO3 -by anion exchange resin showed two stage process comprising a fast initial adsorption process and a slower second adsorption process.Both the pseudo-first-order kinetic model and the pseudo-second-order kinetic model could not be used to predict the adsorption kinetics of NO3 -onto anion exchange resin for the entire sorption period.Only the fast initial portion (t ≤ 20 min) of adsorption kinetics was found to follow pseudo-first-order kinetic model and controlled mainly by external diffusion that is very fast and high, whereas, the slower second portion (t > 20 min) of adsorption kinetics seems to be controlled by a second-order chemical reaction and by intraparticle diffusion.