Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection
Advanced oxidation processes based on photocatalytic generation of • OH radicals have emerged as promising technologies for the removal of recalcitrant pollutants in water. However, their poor recyclability has reduced their potential large-scale application. Herein, a Fe 3 O 4 -embedded ZnO system...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2020-11-01
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| Series: | Air, Soil and Water Research |
| Online Access: | https://doi.org/10.1177/1178622120970954 |
| _version_ | 1819205132263358464 |
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| author | Oscar D Maynez-Navarro Miguel A Mendez-Rojas D Xanat Flores-Cervantes Jose L Sanchez-Salas |
| author_facet | Oscar D Maynez-Navarro Miguel A Mendez-Rojas D Xanat Flores-Cervantes Jose L Sanchez-Salas |
| author_sort | Oscar D Maynez-Navarro |
| collection | DOAJ |
| description | Advanced oxidation processes based on photocatalytic generation of • OH radicals have emerged as promising technologies for the removal of recalcitrant pollutants in water. However, their poor recyclability has reduced their potential large-scale application. Herein, a Fe 3 O 4 -embedded ZnO system has been prepared and its photocatalytic • OH radicals activity was evaluated by monitoring the photo-assisted bleaching of p -nitrosodimethylaniline ( p NDA). Water disinfection performance was determined by measuring Escherichia coli inactivation under different conditions. Bleaching of nearly 80% of the initial p NDA concentration after just 120 minutes under UV 365nm irradiation was determined. Bacterial inactivation at different concentrations (0.1, 1.0, and 5.0 mg mL −1 ) of the Fe 3 O 4 /ZnO nanocomposite was determined, finding that the best performance was obtained at 0.1 mg mL −1 (90%) just after the first 30 minutes under UV irradiation. The materials are easily magnetically recovered and their performance evaluated after 3 consecutive cycles of reuse. These magnetic and photoactive nanocomposites showed improved performance and could be used for wastewater treatment or disinfection processes of water. |
| first_indexed | 2024-12-23T04:46:50Z |
| format | Article |
| id | doaj.art-618f058239f34d8cbb012934f88ddaae |
| institution | Directory Open Access Journal |
| issn | 1178-6221 |
| language | English |
| last_indexed | 2024-12-23T04:46:50Z |
| publishDate | 2020-11-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Air, Soil and Water Research |
| spelling | doaj.art-618f058239f34d8cbb012934f88ddaae2022-12-21T17:59:36ZengSAGE PublishingAir, Soil and Water Research1178-62212020-11-011310.1177/1178622120970954Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water DisinfectionOscar D Maynez-Navarro0Miguel A Mendez-Rojas1D Xanat Flores-Cervantes2Jose L Sanchez-Salas3Department of Civil Engineering, Universidad de las Américas Puebla, San Andrés Cholula, MexicoDepartment of Chemistry and Biological Sciences, Universidad de las Américas Puebla, San Andrés Cholula, MexicoDepartment of Chemical and Food Engineering, Universidad de las Américas Puebla, San Andrés Cholula, MexicoDepartment of Chemistry and Biological Sciences, Universidad de las Américas Puebla, San Andrés Cholula, MexicoAdvanced oxidation processes based on photocatalytic generation of • OH radicals have emerged as promising technologies for the removal of recalcitrant pollutants in water. However, their poor recyclability has reduced their potential large-scale application. Herein, a Fe 3 O 4 -embedded ZnO system has been prepared and its photocatalytic • OH radicals activity was evaluated by monitoring the photo-assisted bleaching of p -nitrosodimethylaniline ( p NDA). Water disinfection performance was determined by measuring Escherichia coli inactivation under different conditions. Bleaching of nearly 80% of the initial p NDA concentration after just 120 minutes under UV 365nm irradiation was determined. Bacterial inactivation at different concentrations (0.1, 1.0, and 5.0 mg mL −1 ) of the Fe 3 O 4 /ZnO nanocomposite was determined, finding that the best performance was obtained at 0.1 mg mL −1 (90%) just after the first 30 minutes under UV irradiation. The materials are easily magnetically recovered and their performance evaluated after 3 consecutive cycles of reuse. These magnetic and photoactive nanocomposites showed improved performance and could be used for wastewater treatment or disinfection processes of water.https://doi.org/10.1177/1178622120970954 |
| spellingShingle | Oscar D Maynez-Navarro Miguel A Mendez-Rojas D Xanat Flores-Cervantes Jose L Sanchez-Salas Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection Air, Soil and Water Research |
| title | Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection |
| title_full | Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection |
| title_fullStr | Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection |
| title_full_unstemmed | Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection |
| title_short | Hydroxyl Radical Generation by Recyclable Photocatalytic FeO/ZnO Nanoparticles for Water Disinfection |
| title_sort | hydroxyl radical generation by recyclable photocatalytic feo zno nanoparticles for water disinfection |
| url | https://doi.org/10.1177/1178622120970954 |
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