Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub>
Ionic liquids (ILs) are considered to be a new type of solvent due to their low vapor pressure, some unique properties and are expected to be used widely in the following days. Given their water solubility, stable chemical structure, and biological toxicity, ILs probably reach aquatic environments a...
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doaj-8cddc7e2b75444cbb5d1c4a64b3467832020-11-25T01:47:09ZengMDPI AGApplied Sciences2076-34172020-01-0110389410.3390/app10030894app10030894Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub>Jianhui Gu0Huimin Zang1Shun Yao2Xuejiao Wang3Minghui Zhu4Hang Song5Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaDepartment of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaDepartment of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 610041, ChinaSchool of Medical and Life Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 610041, ChinaDepartment of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaIonic liquids (ILs) are considered to be a new type of solvent due to their low vapor pressure, some unique properties and are expected to be used widely in the following days. Given their water solubility, stable chemical structure, and biological toxicity, ILs probably reach aquatic environments and become long-term pollutants. We studied the fate of benzothiazolium-based ionic liquids catalyzed by UV-H<sub>2</sub>O<sub>2</sub> in water. Due to the synergistic effect of UV and H<sub>2</sub>O<sub>2</sub>, the degradation efficiency can be significantly improved compared to any of them alone. Fitting results showed that the degradation reaction follows pseudo-first-order kinetics and reaction rate constants with hydroxyl radicals ranging from 0.0005 s<sup>−1</sup> to 0.0529 s<sup>−1</sup>. The experimental data showed that satisfactory results can be obtained at a temperature of 45 ℃, an initial concentration of ionic liquid of 0.1 M, and a hydrogen peroxide concentration of 0.1 M. We also explored the effects of chloride ions and pH on degradation reactions. In an appropriate situation, the degradation yield of [C<sub>4</sub>Bth]PF<sub>6</sub> could achieve 97% in 60 min and 99% in 90 min. The UV-H<sub>2</sub>O<sub>2</sub> combination process could provide an effective technique for the treatment of benzothiazolium-based ionic liquids in wastewater.https://www.mdpi.com/2076-3417/10/3/894photocatalysisdegradationbenzothiazole ionic liquidh<sub>2</sub>o<sub>2</sub> |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jianhui Gu Huimin Zang Shun Yao Xuejiao Wang Minghui Zhu Hang Song |
spellingShingle |
Jianhui Gu Huimin Zang Shun Yao Xuejiao Wang Minghui Zhu Hang Song Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub> Applied Sciences photocatalysis degradation benzothiazole ionic liquid h<sub>2</sub>o<sub>2</sub> |
author_facet |
Jianhui Gu Huimin Zang Shun Yao Xuejiao Wang Minghui Zhu Hang Song |
author_sort |
Jianhui Gu |
title |
Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub> |
title_short |
Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub> |
title_full |
Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub> |
title_fullStr |
Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub> |
title_full_unstemmed |
Study on Degradation of Benzothiazolium-Based Ionic Liquids by UV-H<sub>2</sub>O<sub>2</sub> |
title_sort |
study on degradation of benzothiazolium-based ionic liquids by uv-h<sub>2</sub>o<sub>2</sub> |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2020-01-01 |
description |
Ionic liquids (ILs) are considered to be a new type of solvent due to their low vapor pressure, some unique properties and are expected to be used widely in the following days. Given their water solubility, stable chemical structure, and biological toxicity, ILs probably reach aquatic environments and become long-term pollutants. We studied the fate of benzothiazolium-based ionic liquids catalyzed by UV-H<sub>2</sub>O<sub>2</sub> in water. Due to the synergistic effect of UV and H<sub>2</sub>O<sub>2</sub>, the degradation efficiency can be significantly improved compared to any of them alone. Fitting results showed that the degradation reaction follows pseudo-first-order kinetics and reaction rate constants with hydroxyl radicals ranging from 0.0005 s<sup>−1</sup> to 0.0529 s<sup>−1</sup>. The experimental data showed that satisfactory results can be obtained at a temperature of 45 ℃, an initial concentration of ionic liquid of 0.1 M, and a hydrogen peroxide concentration of 0.1 M. We also explored the effects of chloride ions and pH on degradation reactions. In an appropriate situation, the degradation yield of [C<sub>4</sub>Bth]PF<sub>6</sub> could achieve 97% in 60 min and 99% in 90 min. The UV-H<sub>2</sub>O<sub>2</sub> combination process could provide an effective technique for the treatment of benzothiazolium-based ionic liquids in wastewater. |
topic |
photocatalysis degradation benzothiazole ionic liquid h<sub>2</sub>o<sub>2</sub> |
url |
https://www.mdpi.com/2076-3417/10/3/894 |
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