Abstract
The best fit equations of linear and non-linear forms of the two widely used kinetic models, namely pseudo-first-order (PFO) and pseudo-second-order (PSO) equations, were compared in this study. The experimental kinetics of [AuCl4]−removal by p-hydroxybenzoate intercalated Mg/Al-hydrotalcite was used for this research. R2 coefficient was employed as error analysis methods to determine the best-fitting equations. The results show that the non-linear form was better at best-fitting than the linear form. The experimental kinetics may have been distorted by linearization of the linear kinetic equations, and thus, the non-linear forms of kinetic equations should be primarily used to obtain the adsorption parameters.
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