Matrix Effects on the Degradation of Gemfibrozil, Hydrochlorothiazide, and Naproxen by Heterogeneous Photocatalysis
| Autor: | Vinícius A.B. Paiva, Ivo Amildon Ricardo, Eduardo O. Marson, Alam G. Trovó, Cleiseano E.S. Paniagua, Bárbara R. Gonçalves |
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| Rok vydání: | 2020 |
| Předmět: |
advanced oxidation process
Naproxen Aqueous solution Chromatography operational conditions titanium dioxide Chemistry Advanced oxidation process General Chemistry Matrix (chemical analysis) contaminants of emerging concern medicine Degradation (geology) Sewage treatment environmental aqueous matrices Surface water Effluent medicine.drug |
| Zdroj: | Journal of the Brazilian Chemical Society v.31 n.6 2020 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ Journal of the Brazilian Chemical Society, Volume: 31, Issue: 6, Pages: 1161-1169, Published: 08 JUN 2020 |
| ISSN: | 0103-5053 |
| DOI: | 10.21577/0103-5053.20200002 |
| Popis: | The degradation of a pharmaceutical mixture (gemfibrozil, hydrochlorothiazide and naproxen) by TiO2/UV-A in different aqueous matrices was evaluated. The matrix components affected the operational conditions, rate constants, and removal efficiency of the pharmaceuticals, as well as toxicity. For sewage treatment plant effluent, a TiO2 concentration three-fold higher (450 mg L−1) and an irradiation time 1.5-3 times longer were required to reach the same efficiency of degradation as the pharmaceuticals in deionized water and surface water matrices. An improvement in the rate constants and the removal efficiency of the pharmaceuticals was achieved by adding 6 mg L−1 of H2O2 and 150 mg L−1 of TiO2 in deionized water and surface water, but not in the sewage treatment plant effluent, due to the coupling of 450 mg L−1 of TiO2 and 50-200 mg L−1 of H2O2. Overall, TiO2/UV-A efficiently degraded all compounds, but an additional step is needed for the removal of residual toxicity. |
| Databáze: | OpenAIRE |
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