Modeling of aqueous phase adsorption: Is it time to bid adieu to the Harkins–Jura isotherm?

The Harkins–Jura isotherm equation was originally developed to interpret sigmoid or type II isotherms exhibited by gas–solid adsorption systems. Surprisingly, in the field of water contaminant adsorption, it has been exclusively used describe hyperbolic I since mid-2000s. Given availability several models capable handling data, we must ask ourselves: Is there a need for isotherm? To gain acceptance into pool curve-fitting demonstrate superiority over existing, well-established models. When pitted against grand masters such models, i.e., Langmuir and Freundlich equations, found be distinctly inferior modeling data with without an apparent plateau. Worse still, also perform poorly correlation which its original intended purpose. very limited power, argue that is time bid adieu mediocre isotherm.