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Degradation behaviors of naproxen by a hybrid TiO2 photocatalyst system with process components
- Source :
- Science of The Total Environment. 708:135216
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- A hybrid system combining microwave and a microwave discharge electrodeless lamp (MDEL) was proposed to overcome the limitations of conventional TiO2 photocatalysts. The degradation efficiency and mechanism of naproxen were determined using a series of single processes, including conventional TiO2 photocatalyst reactors and a hybrid system that fuses them. Although the degradation efficiency tended to increase after changing the experimental condition of a single process, the optimal conditions existed for these experimental conditions. On the other hand, remarkable synergy was observed in the fused process, whose efficiency was significantly higher than that of the unit process. In particular, the optimal degradation ability was obtained by adding hydrogen peroxide together with microwave irradiation. The seven intermediates in the proposed photocatalytic degradation pathway were generated by the demethylation and hydroxylation by hydroxyl radicals. These results are expected to provide new data on the design of high efficiency photocatalytic systems at low cost.
- Subjects :
- Environmental Engineering
Materials science
010504 meteorology & atmospheric sciences
Radical
010501 environmental sciences
01 natural sciences
Pollution
law.invention
Hydroxylation
chemistry.chemical_compound
chemistry
Chemical engineering
law
Hybrid system
Photocatalysis
Environmental Chemistry
Degradation (geology)
Electrodeless lamp
Hydrogen peroxide
Waste Management and Disposal
Microwave
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 00489697
- Volume :
- 708
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi...........95c3e9e48ad182cb1501bb0ded68b80f