“…Best results from the plots were obtained for Langmuir adsorption isotherm, that suggests monolayer adsorption of both EAE and BE on the CS surface at all temperatures. Figure 6a, b show the straight lines of C/h versus C, deviate from unity for EAE at 20-40°C, indicates that the interaction force between phytochemical compounds on the CS surface cannot be neglected [28,31], and each molecule occupies more than one adsorption site on the metal surface [32]. A modified Langmuir adsorption isotherm could be applied to this phenomenon, which is given by following equation [33]: On the contrary, for the BE, the slope almost equals to unity, which suggests that the interaction of adsorbed species is negligible [34].…”