Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis
The deployment of photocatalysis for remediation of water has not yet been realized, although laboratory-scale studies have demonstrated promise. Accomplishing this requires the development of photocatalysis as a process, including studying its efficiencies in remedying water when high volumes of wa...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/19/2623 |
| _version_ | 1797515732781629440 |
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| author | Jonathan Bockenstedt Niraj Ashutosh Vidwans Terry Gentry Sreeram Vaddiraju |
| author_facet | Jonathan Bockenstedt Niraj Ashutosh Vidwans Terry Gentry Sreeram Vaddiraju |
| author_sort | Jonathan Bockenstedt |
| collection | DOAJ |
| description | The deployment of photocatalysis for remediation of water has not yet been realized, although laboratory-scale studies have demonstrated promise. Accomplishing this requires the development of photocatalysis as a process, including studying its efficiencies in remedying water when high volumes of water are processed, and addressing the recovery, possible regeneration and reuse of the photocatalysts. To that end, this work is aimed at demonstrating the use of a custom-built mobile platform for disinfecting large quantities of water. The benchtop platform built is capable of processing 15.14 L (4 gallons) per minute of water, with possibility for further scale-up. Preliminary studies on the catalyst recovery, regeneration and reuse via gravity-assisted settling, centrifugation and air plasma treatment indicated that 77% of Aeroxide<sup>®</sup> P25 titania (TiO<sub>2</sub>) nanoparticle and 57% of porous TiO<sub>2</sub> nanowire photocatalysts could be recovered and regenerated for further use. Overall, this study indicated that process improvements, including increasing the kinetics of the photocatalysis, and optimization of the efficacies of the catalyst recovery and regeneration processes will make it useful for water remediation on any scale. More importantly, the portable and flexible nature of the benchtop photocatalysis system makes it amenable for use in conjunction with existing technologies for remedying large quantities of water. |
| first_indexed | 2024-03-10T06:49:32Z |
| format | Article |
| id | doaj.art-bb3683d4be054f9fac4117a800be393c |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T06:49:32Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-bb3683d4be054f9fac4117a800be393c2023-11-22T17:00:00ZengMDPI AGWater2073-44412021-09-011319262310.3390/w13192623Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using PhotocatalysisJonathan Bockenstedt0Niraj Ashutosh Vidwans1Terry Gentry2Sreeram Vaddiraju3Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USAArtie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USADepartment of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843, USAArtie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USAThe deployment of photocatalysis for remediation of water has not yet been realized, although laboratory-scale studies have demonstrated promise. Accomplishing this requires the development of photocatalysis as a process, including studying its efficiencies in remedying water when high volumes of water are processed, and addressing the recovery, possible regeneration and reuse of the photocatalysts. To that end, this work is aimed at demonstrating the use of a custom-built mobile platform for disinfecting large quantities of water. The benchtop platform built is capable of processing 15.14 L (4 gallons) per minute of water, with possibility for further scale-up. Preliminary studies on the catalyst recovery, regeneration and reuse via gravity-assisted settling, centrifugation and air plasma treatment indicated that 77% of Aeroxide<sup>®</sup> P25 titania (TiO<sub>2</sub>) nanoparticle and 57% of porous TiO<sub>2</sub> nanowire photocatalysts could be recovered and regenerated for further use. Overall, this study indicated that process improvements, including increasing the kinetics of the photocatalysis, and optimization of the efficacies of the catalyst recovery and regeneration processes will make it useful for water remediation on any scale. More importantly, the portable and flexible nature of the benchtop photocatalysis system makes it amenable for use in conjunction with existing technologies for remedying large quantities of water.https://www.mdpi.com/2073-4441/13/19/2623waterdisinfectionbenchtopphotocatalysistitania<i>E. coli</i> |
| spellingShingle | Jonathan Bockenstedt Niraj Ashutosh Vidwans Terry Gentry Sreeram Vaddiraju Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis Water water disinfection benchtop photocatalysis titania <i>E. coli</i> |
| title | Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis |
| title_full | Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis |
| title_fullStr | Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis |
| title_full_unstemmed | Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis |
| title_short | Catalyst Recovery, Regeneration and Reuse during Large-Scale Disinfection of Water Using Photocatalysis |
| title_sort | catalyst recovery regeneration and reuse during large scale disinfection of water using photocatalysis |
| topic | water disinfection benchtop photocatalysis titania <i>E. coli</i> |
| url | https://www.mdpi.com/2073-4441/13/19/2623 |
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