Description of sigmoid adsorption isotherms of water pollutants by the Aranovich–Donohue equation

In the field of adsorptive water remediation, Brunauer–Emmett–Teller (BET) equation is often used to describe sigmoid type II isotherm data. A standard a composite curve that comprises I and III at low high concentrations, respectively. The BET uses Langmuir-like function unique represent curve. However, ability this mathematical combination fit atypical isotherms somewhat limited. has been modified in various ways improve its data fitting ability. Aranovich–Donohue an interesting modification it flexible structure allows users choose model concentrations. It shown here featuring Sips capable accurately correlating anomalous acid red black dye data, outperforming original equation. Furthermore, Aranovich–Donohue–Sips can track phenol characterized by V demonstrating versatility nonstandard