Fig. 3

Effect of amount Fe(III)–Mt on the rate of adsorption of MB dye solution; (a) Fe(III)–Mt (0.01 g), MB dye (0.025 mM) (b) Fe(III)–Mt (0.02 g), MB dye (0.025 mM) (c) Fe(III)–Mt (0.03 g), MB dye (0.025 mM)