Photocatalytic degradation process of antibiotic sulfamethoxazole by ZnO in aquatic systems : a dynamic kinetic model based on contributions of OH radical, oxygenated radical intermediates and dissolved oxygen
The photocatalytic degradation process of sulfamethoxazole (SMX) using ZnO in aquatic systems has been systematically studied by varying initial SMX concentration from 0 to 15 mgL-1, ZnO dosage from 0 to 4 gL-1 and UV light intensity at the light source from 0 to 18 W(m-lamp length)-1 at natural pH. Almost complete degradations of SMX were achieved within 120 min for the initial SMX concentration ≤15 mgL-1 with ZnO dosage of 3 gL-1 and UV light intensity of 18 W(m-lamp length)-1. The photocatalytic degradation process was found to be interacted with the dissolved oxygen (DO) consumption. With oxygen supply through the gas-liquid free-surface, the DO concentration decreased significantly in the initial SMX degradation phase and increased asymptotically to the saturated DO concentration after achieving about 80% SMX degradation. The change in DO concentration was probably controlled by the oxygen consumption in the formation of oxygenated radical intermediates. A novel dynamic kinetic model based on the fundamental reactions of photocatalysis and the formation of oxygenated radical intermediates was developed. In the modeling the dynamic concentration profiles of OH radical and DO are considered. The dynamics of SMX degradation process by ZnO was simulated reasonably by the proposed model.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:59 |
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| Enthalten in: |
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering - 59(2024), 3 vom: 17., Seite 113-124 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Takahashi, Yuka [VerfasserIn] |
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| Links: |
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| Themen: |
Anti-Bacterial Agents |
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| Anmerkungen: |
Date Completed 19.04.2024 Date Revised 19.04.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1080/10934529.2024.2339171 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM371086485 |
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| 100 | 1 | |a Takahashi, Yuka |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Photocatalytic degradation process of antibiotic sulfamethoxazole by ZnO in aquatic systems |b a dynamic kinetic model based on contributions of OH radical, oxygenated radical intermediates and dissolved oxygen |
| 264 | 1 | |c 2024 | |
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| 500 | |a Date Completed 19.04.2024 | ||
| 500 | |a Date Revised 19.04.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The photocatalytic degradation process of sulfamethoxazole (SMX) using ZnO in aquatic systems has been systematically studied by varying initial SMX concentration from 0 to 15 mgL-1, ZnO dosage from 0 to 4 gL-1 and UV light intensity at the light source from 0 to 18 W(m-lamp length)-1 at natural pH. Almost complete degradations of SMX were achieved within 120 min for the initial SMX concentration ≤15 mgL-1 with ZnO dosage of 3 gL-1 and UV light intensity of 18 W(m-lamp length)-1. The photocatalytic degradation process was found to be interacted with the dissolved oxygen (DO) consumption. With oxygen supply through the gas-liquid free-surface, the DO concentration decreased significantly in the initial SMX degradation phase and increased asymptotically to the saturated DO concentration after achieving about 80% SMX degradation. The change in DO concentration was probably controlled by the oxygen consumption in the formation of oxygenated radical intermediates. A novel dynamic kinetic model based on the fundamental reactions of photocatalysis and the formation of oxygenated radical intermediates was developed. In the modeling the dynamic concentration profiles of OH radical and DO are considered. The dynamics of SMX degradation process by ZnO was simulated reasonably by the proposed model | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a OH radical | |
| 650 | 4 | |a Photocatalytic degradation | |
| 650 | 4 | |a dynamic kinetic model | |
| 650 | 4 | |a sulfamethoxazole | |
| 650 | 4 | |a zinc oxide | |
| 650 | 7 | |a Sulfamethoxazole |2 NLM | |
| 650 | 7 | |a JE42381TNV |2 NLM | |
| 650 | 7 | |a Anti-Bacterial Agents |2 NLM | |
| 650 | 7 | |a Zinc Oxide |2 NLM | |
| 650 | 7 | |a SOI2LOH54Z |2 NLM | |
| 650 | 7 | |a Oxygen |2 NLM | |
| 650 | 7 | |a S88TT14065 |2 NLM | |
| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 700 | 1 | |a Kobayashi, Maki |e verfasserin |4 aut | |
| 700 | 1 | |a Kawase, Yoshinori |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering |d 1997 |g 59(2024), 3 vom: 17., Seite 113-124 |w (DE-627)NLM097504394 |x 1532-4117 |7 nnns |
| 773 | 1 | 8 | |g volume:59 |g year:2024 |g number:3 |g day:17 |g pages:113-124 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1080/10934529.2024.2339171 |3 Volltext |
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