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The discoloration‐degradation of yellow 5 dye was achieved through the heterogeneous Fenton reaction using Cu‐Y catalysts. Cu‐Y materials were prepared by an aqueous ion exchange method from the NH4‐Y parent zeolite. The solids are characterized by X‐ray diffraction, nitrogen physisorption, EPR and, 27Al and 29Si NMR spectroscopies. Discoloration around 100% with 60% of COD removal was achieved before...
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