Piezo-enhanced photocatalytic diclofenac mineralization over ZnO |
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| Institution: | 1. Department of Chemistry, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy;2. Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), via Giusti 9, 50121 Florence, Italy;3. Polytechnique Montréal – Génie Chimique 2900 Boul, Edouard Montpetit – H3T 1J4, Montréal, QC, Canada;4. Department of Chemistry, Università degli Studi di Torino, via Pietro Giuria, 7, 10125 Torino, Italy;5. ISTM-CNR, via Golgi 19, 20133 Milano, Italy |
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| Abstract: | The degradation of diclofenac has been realized for the first time by a piezo-enhanced sonophotocatalytic approach based on ZnO. The sonophotocatalytic degradation showed a slight enhancement in the degradation of the parent compound, whereas strong synergistic effects were observed for the mineralization process when suitable ZnO morphologies are used, reaching 70% of complete degradation of 25 ppm diclofenac using 0.1 g/L ZnO in 360 min. Tests in a complex water matrix show enhanced diclofenac removal, outperforming a TiO2 benchmark photocatalyst. These promising experimental results promote this process as a good alternative to traditional degradation approaches for remediation of real water matrices. |
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| Keywords: | Advanced oxidation processes ZnO Diclofenac Piezo-enhanced photodegradation Mineralization Transformation products |
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