Fig. 1: Effect of EDTA on ferrate(VI) removing pollutants.

A Effect of EDTA on ferrate(VI) removing pollutants, B phenol removal at different pH, and C, D the reaction ratio (∆[phenol]/∆[K2FeO4]). Initial concentrations of reactants: [K2FeO4]0 = 50 μM; [Phenol]0 = 5 μM in (A, B), 20 μM in (C and D); [4-ClP]0 = 10 μM; [AAP]0 = 10 μM ([Fe(VI)]0 = 20 μM); [4-tBP]0 = 20 μM; [BPA]0 = 20 μM. pH = 8.0 in (A–D). Phosphates were used for the buffer solutions of pH 5.0 and 6.0, and borate for that of other pH.