Where, m is the mass of adsorbent (g), V is the volume of the solution (L), C0 is the initial
concentration of methylene blue (mg/L), Ce is the equilibrium concentration of the adsorbate (mg/L) in
solution and qe is the methylene blue quantity adsorbed at equilibrium (mg/g). For the calculation of
methylene blue rate adsorption (R %), the following expression was used: