Iron compounds peroxide value

Without added iron, 7 mol of hydrogen peroxide were needed per mole of PCP oxidized, whereas the peroxide demand for TCE degradation was 3.7 mol of peroxide per mole of TCE oxidized. With Fe2+, these peroxide demands decreased to 4.3 and 2.1 for PCP and TCE, respectively. Chloride release was 80-90% of the theoretical value for each compound and was only slightly higher with added iron. This early study demonstrated the potential to perform in situ Fenton oxidation without added iron. However, the added complexity of most real systems increases the need for added soluble iron. 

The resulting hydroperoxo-ferriheme complex is nonetheless unstable, as the peroxide ligand weakly ligates the heme iron , and the dissociation rate constant for the peroxide anion as the sixth ligand in Fe-microperoxidase-8 (Fe-MP8) and Mn-MP8 is in the neighborhood of 10-20 s (ref [60]). Similar estimates can be made from other kinetic studies" which measured the and values for the formation of Compound I in reaction of HRP with hydrogen peroxide. The reported millimolar values and the observed cat order of 10 M s suggest that... 

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