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Journal of the Mexican Chemical Society

Print version ISSN 1870-249X


REYES, Iván A. et al. Use of Ligand-based Iron Complexes for Phenol Degradation by Fenton Modified Process. J. Mex. Chem. Soc [online]. 2013, vol.57, n.2, pp.96-104. ISSN 1870-249X.

The efficiency of phenol degradation by the iron complexes ([Fe(TBMA)Cl33H2O] and [Fe(terpy)Cl2]) is compared with that of the Fenton reaction. The results show that although the Fenton reaction efficiently oxidizes phenol at low pH's, the Fenton modified reagents (iron complexes/H2O2) effectively oxidize phenol at neutral pH. Besides, the factorial designing study is performed by considering three independent variables: (i) [Fe] (A), (ii) pH (B), and (iii) [H2O2] (C). For the Fenton reaction, the normal probability plot reveals that two factors, such as concentration of Fe2+ and interaction{[H2O2]pH} have considerable influence on the phenol oxidation; in the normal probability plot of the complexes, factors C (concentration of H2O2) and AC {[Fe][H2O2]} have an effect on the oxidation of the phenol by [Fe(terpy)Cl2]/H2O2, while for [Fe(TBMA)Cl33H2O], factors B and AC significantly influence the degradation. Of both iron complexes, [Fe(TBMA)Cl33H2O]/H2O2 is an excellent oxidant, showing a good response at pH 7.0.

Keywords : Modified Fenton reagent; factorial design; iron complexes; phenol oxidation.

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