KAv is the Avrami constant and nAv is the Avrami model exponent of time related to the change in mechanism of ad-
sorption. KAv and nAv can be obtained from the intercept and slope of the plot of ln[ln(1α)] against lnt.
The nonlinear and linear forms of Fractional power kinetic model equation are depicted by (Eqs. (14) and 15) respec-
tively;