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The mechanisms of catalytic ozonation of coumarin on ZSM-5 zeolites and γ-alumina in water have been studied. Coumarin is known to react with hydroxyl radicals to produce 7-hydroxycoumarin and is used to differentiate between radical and non-radical mechanisms. The effect of the radical scavenger (t-butanol) and phosphates has also been used to study the possible involvement of radicals and the role...
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