“…The decrease in randomness during the adsorption process is shown by a negative value of Δ S . Based on several reports, the negative Δ H value shows the exothermic nature of adsorption. − Furthermore, the Δ G values represent the degree of spontaneity of the adsorption process, which, as determined by the aforementioned eq S16, at 298, 308, 318, 328, and 338 K are −1.8, −12.5, −12.2, −11.6 and −9.8 kJ mol –1 , respectively.…”