Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater
Water pollution due to dyes and pathogens is problematic worldwide, and the disease burden is higher in low-income countries where water treatment facilities are usually inadequate. Thus the development of low-cost techniques for the removal of dyes and pathogens in aquatic systems is critical for s...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Academy of Science of South Africa
2022
|
| Subjects: | |
| Online Access: | https://doi.org/10.17159/sajs.2022/10938 http://hdl.handle.net/11408/5028 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1779905339301298176 |
|---|---|
| author | Malunga, Sibongile M. Chaukura, Nhamo Mbiriri, Chiedza I. Gwenzi, Willis Moyo, Mambo Kuvarega, Alex T. |
| author_facet | Malunga, Sibongile M. Chaukura, Nhamo Mbiriri, Chiedza I. Gwenzi, Willis Moyo, Mambo Kuvarega, Alex T. |
| author_sort | Malunga, Sibongile M. |
| collection | DSpace |
| description | Water pollution due to dyes and pathogens is problematic worldwide, and the disease burden is higher in low-income countries where water treatment facilities are usually inadequate. Thus the development of low-cost techniques for the removal of dyes and pathogens in aquatic systems is critical for safeguarding human and ecological health. In this work, we report the fabrication and use of a photocatalyst derived from waste from coal combustion in removing dyes and pathogens from wastewater. Higher TiO2 loading of the photocatalyst increased the removal efficiency for methyl orange (95.5%), and fluorine-doping improved the disinfection efficacy from 76% to 95% relative to unmodified material. Overall, the work effectively converted hazardous waste into a value-added product that has potential in point-of-use water treatment. Future research should focus on upscaling the technique, investigating the fate of the potential of the photocatalysts for multiple reuse, and the recovery of TiO2 in treated water. |
| format | Article |
| id | ir-11408-5028 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publisher | Academy of Science of South Africa |
| record_format | dspace |
| spelling | ir-11408-50282022-08-02T18:00:58Z Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater Malunga, Sibongile M. Chaukura, Nhamo Mbiriri, Chiedza I. Gwenzi, Willis Moyo, Mambo Kuvarega, Alex T. Catalysis Environmental remediation Pollution Porous materials wastewater Water pollution due to dyes and pathogens is problematic worldwide, and the disease burden is higher in low-income countries where water treatment facilities are usually inadequate. Thus the development of low-cost techniques for the removal of dyes and pathogens in aquatic systems is critical for safeguarding human and ecological health. In this work, we report the fabrication and use of a photocatalyst derived from waste from coal combustion in removing dyes and pathogens from wastewater. Higher TiO2 loading of the photocatalyst increased the removal efficiency for methyl orange (95.5%), and fluorine-doping improved the disinfection efficacy from 76% to 95% relative to unmodified material. Overall, the work effectively converted hazardous waste into a value-added product that has potential in point-of-use water treatment. Future research should focus on upscaling the technique, investigating the fate of the potential of the photocatalysts for multiple reuse, and the recovery of TiO2 in treated water. 2022-08-02T18:00:58Z 2022-08-02T18:00:58Z 2022-01-27 Article Malunga, S. M., Chaukura, N., Mbiriri, C. I., Gwenzi, W., Moyo, M., & Kuvarega, A. T. (2022). Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater. South African Journal of Science, 118(1/2). https://doi.org/10.17159/sajs.2022/10938 0038-2353 1996-7489 https://doi.org/10.17159/sajs.2022/10938 http://hdl.handle.net/11408/5028 en South African Journal of Science (SAJS);Vol. 118, No. 1/2 open Academy of Science of South Africa |
| spellingShingle | Catalysis Environmental remediation Pollution Porous materials wastewater Malunga, Sibongile M. Chaukura, Nhamo Mbiriri, Chiedza I. Gwenzi, Willis Moyo, Mambo Kuvarega, Alex T. Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater |
| title | Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater |
| title_full | Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater |
| title_fullStr | Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater |
| title_full_unstemmed | Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater |
| title_short | Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater |
| title_sort | visible light photodegradation of methyl orange and escherichia coli o157:h7 in wastewater |
| topic | Catalysis Environmental remediation Pollution Porous materials wastewater |
| url | https://doi.org/10.17159/sajs.2022/10938 http://hdl.handle.net/11408/5028 |
| work_keys_str_mv | AT malungasibongilem visiblelightphotodegradationofmethylorangeandescherichiacolio157h7inwastewater AT chaukuranhamo visiblelightphotodegradationofmethylorangeandescherichiacolio157h7inwastewater AT mbiririchiedzai visiblelightphotodegradationofmethylorangeandescherichiacolio157h7inwastewater AT gwenziwillis visiblelightphotodegradationofmethylorangeandescherichiacolio157h7inwastewater AT moyomambo visiblelightphotodegradationofmethylorangeandescherichiacolio157h7inwastewater AT kuvaregaalext visiblelightphotodegradationofmethylorangeandescherichiacolio157h7inwastewater |