Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C)
Ethylene glycol (EG) is a contaminant in the wastewater of airports because it is commonly used in aircraft deicing fluids during the cold season in northern regions. Ethylene glycol by itself has relatively low toxicity to mammals and aquatic organisms, but it can lead to a substantial increase in...
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MDPI AG
2024-12-01
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| author | Timur Fazliev Mikhail Lyulyukin Denis Kozlov Dmitry Selishchev |
| author_facet | Timur Fazliev Mikhail Lyulyukin Denis Kozlov Dmitry Selishchev |
| author_sort | Timur Fazliev |
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| description | Ethylene glycol (EG) is a contaminant in the wastewater of airports because it is commonly used in aircraft deicing fluids during the cold season in northern regions. Ethylene glycol by itself has relatively low toxicity to mammals and aquatic organisms, but it can lead to a substantial increase in chemical and biological oxygen demands. The contamination of water with EG facilitates the rapid growth of microbial biofilms, which decreases the concentration of dissolved oxygen in water and negatively affects overall biodiversity. The development of a simple method to decompose EG with high efficiency and low operating costs is important. This study revealed that ethylene glycol can be completely oxidized using UV-C activated hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) at a high rate (up to 56 mg L<sup>−1</sup> h<sup>−1</sup>) at an optimum EG:H<sub>2</sub>O<sub>2</sub> molar ratio of 1:10–1:15. Air purging the reaction mixture at 1000 cm<sup>3</sup> min<sup>−1</sup> increases the EG mineralization rate up to two times because the simultaneous action of UV-activated H<sub>2</sub>O<sub>2</sub> and O<sub>2</sub> (H<sub>2</sub>O<sub>2</sub> + O<sub>2</sub>/UV-C) leads to a synergistic effect, especially at low EG:H<sub>2</sub>O<sub>2</sub> ratios. The kinetics and mechanism of EG degradation are discussed on the basis of the concentration profiles of ethylene glycol and intermediate products. |
| format | Article |
| id | doaj-art-a32910977d974969abff66c4e78d8bf7 |
| institution | Kabale University |
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| publishDate | 2024-12-01 |
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| series | Molecules |
| spelling | doaj-art-a32910977d974969abff66c4e78d8bf72025-01-10T13:18:43ZengMDPI AGMolecules1420-30492024-12-013014910.3390/molecules30010049Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C)Timur Fazliev0Mikhail Lyulyukin1Denis Kozlov2Dmitry Selishchev3Research and Educational Center “Institute of Chemical Technologies”, Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, RussiaResearch and Educational Center “Institute of Chemical Technologies”, Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, RussiaResearch and Educational Center “Institute of Chemical Technologies”, Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, RussiaResearch and Educational Center “Institute of Chemical Technologies”, Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, RussiaEthylene glycol (EG) is a contaminant in the wastewater of airports because it is commonly used in aircraft deicing fluids during the cold season in northern regions. Ethylene glycol by itself has relatively low toxicity to mammals and aquatic organisms, but it can lead to a substantial increase in chemical and biological oxygen demands. The contamination of water with EG facilitates the rapid growth of microbial biofilms, which decreases the concentration of dissolved oxygen in water and negatively affects overall biodiversity. The development of a simple method to decompose EG with high efficiency and low operating costs is important. This study revealed that ethylene glycol can be completely oxidized using UV-C activated hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) at a high rate (up to 56 mg L<sup>−1</sup> h<sup>−1</sup>) at an optimum EG:H<sub>2</sub>O<sub>2</sub> molar ratio of 1:10–1:15. Air purging the reaction mixture at 1000 cm<sup>3</sup> min<sup>−1</sup> increases the EG mineralization rate up to two times because the simultaneous action of UV-activated H<sub>2</sub>O<sub>2</sub> and O<sub>2</sub> (H<sub>2</sub>O<sub>2</sub> + O<sub>2</sub>/UV-C) leads to a synergistic effect, especially at low EG:H<sub>2</sub>O<sub>2</sub> ratios. The kinetics and mechanism of EG degradation are discussed on the basis of the concentration profiles of ethylene glycol and intermediate products.https://www.mdpi.com/1420-3049/30/1/49environmental protectionwastewater treatmentethylene glycol (EG)advanced oxidation processes (AOPs)photodegradationH<sub>2</sub>O<sub>2</sub>/UV-C |
| spellingShingle | Timur Fazliev Mikhail Lyulyukin Denis Kozlov Dmitry Selishchev Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) Molecules environmental protection wastewater treatment ethylene glycol (EG) advanced oxidation processes (AOPs) photodegradation H<sub>2</sub>O<sub>2</sub>/UV-C |
| title | Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) |
| title_full | Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) |
| title_fullStr | Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) |
| title_full_unstemmed | Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) |
| title_short | Kinetic Aspects of Ethylene Glycol Degradation Using UV-C Activated Hydrogen Peroxide (H<sub>2</sub>O<sub>2</sub>/UV-C) |
| title_sort | kinetic aspects of ethylene glycol degradation using uv c activated hydrogen peroxide h sub 2 sub o sub 2 sub uv c |
| topic | environmental protection wastewater treatment ethylene glycol (EG) advanced oxidation processes (AOPs) photodegradation H<sub>2</sub>O<sub>2</sub>/UV-C |
| url | https://www.mdpi.com/1420-3049/30/1/49 |
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