Unveiling new insights: Revised Temkin adsorption isotherm parameters from fresh curve fits in adsorption studies

Abstract

• Temkin adsorption isotherms are reviewed. • The nonlinear Temkin adsorption isotherm proposed by K.H. Chu ( Chu, 2021 ) is stated. • Adsorption data are nonlinearly re-correlated to this new Temkin isotherm given in Chu (2021) . • Model parameters differ significantly for the traditional and newly proposed Temkin isotherms. This article aims to: (i) revisit the Temkin adsorption isotherm employed for adsorption data modeling in many publications, (ii) to concisely describe the recently nonlinear Temkin adsorption isotherm model developed by Chu (2021), and (iii) and to re-correlate the equilibrium adsorption data from published studies to this recent Temkin adsorption isotherm and recalculate the values of the fitting parameters. The values of the Temkin isotherm constant (also designated the equilibrium binding constant ) obtained from the two correlation approaches applied in this work may differ significantly. This newly proposed Temkin adsorption isotherm can be important in some practical cases. Such a case can be when a laboratory-scale batch aqueous-phase adsorption process, which is predominantly captured by the newly proposed Temkin adsorption isotherm, is being scaled-up to its slurry contact adsorption.