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OZONE

Definition

A specific molecular (allotropic) state of oxygen. The ozone molecule contains three oxygen (molecular weight of 48.00 grams per mole). Ozone is the fourth most powerful oxidizing agent known (only F2, F2O, and O• are better) and is thought to have a mechanism of oxidation related to the following reaction: O3 -> O2 + O•, where nascent oxygen produces a high-energy oxidation via free radical reaction. The decomposition of ozone in aqueous solutions is via short-lived radicals. Rate of decomposition depends on the composition and properties of the solution, especially the organic load, the pH value and the temperature. Therefore, in seawater, where pH values normally are higher than in freshwater, the breakdown of ozone is more rapid.

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