Ll. Potapova et al., Physicochemical properties and catalytic activity of M center dot EDTA complexes in the oxidation of hydrogen sulfide, RUSS J PH C, 74, 2000, pp. S564-S567
The catalytic activity of M.EDTA complexes (M = Fe, Mn, V) fixed on a fibro
us ion exchanger in the oxidation of H2S to elementary sulfur was studied.
IR spectra for the complexonate solutions were obtained. The physicochemica
l properties of the M.EDTA complexes were considered. It was concluded that
the high activity of the Fe.EDTA complex is due to optimal thermodynamic p
roperties of the Fe3+.L/Fe2+.L pair and the formation of the active interme
diate complex HS-...Fe.EDTA...O-2, which provides a high rate of electron t
ransfer.