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A useful definition of enhanced oxidation would be: <br /> A process, where the rate of oxidation of a contaminant <br /> is greatly enhanced over that obtained by simple <br /> oxidation alone due to the additional participation of <br /> powerful oxidizing radical agents such as HO•, HOZ', <br /> and O*. <br /> Generalized Reaction: <br /> O 2/H O <br /> X + HO ---4 - --4 --) CO2 + H2O (+Cl-) <br /> Once generated, the HO* radicals aggressively react with any <br /> oxidizable contaminant in solution. An overview of the <br /> comparative rate of HO• attack on various classes of contaminants <br /> compared to that for 03 is given in Table 1. A review of the <br /> data in Table 1 shows that the rate of HO• attack on contaminants <br /> is typically 106 to 109 times as fast as the rate of 03 attack. <br /> The HO* radical reacts with contaminants principally in one of <br /> two ways . It can add to the contaminants such as olefins or <br /> aromatic compounds, or it can abstract a hydrogen atom as with <br /> alkanes or alcohols. Either of these processes initiates a <br /> complex oxidative cascade of reactions which leads utimately to <br /> CO2 and H2O (and Cl in the case of chlorinated compounds ) . <br /> The Solarchem Rayox process can be described as a <br /> second-generation enhanced oxidation system; that is , the rate <br /> and range of contaminant destruction is greatly enhanced over <br /> that obtained with earlier embodiments of the technology. In <br /> addition, this process can provide "deep cleaning" such as five <br /> or more orders of magnitude of decontamination (> 99. 999°% <br /> destruction) at reasonable cost. <br /> -6- <br />