Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer

Table 2

The equations and their plot parameters of kinetic models.

Kinetic models	Equations	Plot parameters
Pseudo-first-order		q e (mg/g): the adsorption capacity at equilibrium; qt (mg/g): the adsorption capacity at time t (min); k1 (1/min): the pseudo-first-order rate constant; k2 (g/mg min): the pseudo-second-order rate constant; kI (mg/(g·min1/2)): the intraparticle diffusion rate constant; I (mg/g): the intercept
Pseudo-second-order
Intraparticle diffusion model