Fig. 4

Removal of MB dye by a stoichiometric amount of Fe(III)–Mt at different pH. b Excess amount of Fe(III)–Mt at pH 3 and 7. c Sub-stoichiometric amount of Fe(III)–Mt at pH 3 and 7
Removal of MB dye by a stoichiometric amount of Fe(III)–Mt at different pH. b Excess amount of Fe(III)–Mt at pH 3 and 7. c Sub-stoichiometric amount of Fe(III)–Mt at pH 3 and 7