Performance on adsorption of toluene by ionic liquid-modified AC in high-humidity exhaust gas

被引：2

作者：

Guo J.-F. ^{[1
]}

Ping Z.-L. ^{[1
]}

Liu N. ^{[2
]}

Zhang X. ^{[1
,4
]}

Lv J.-L. ^{[2
]}

Yao Y.-Y. ^{[2
]}

Hu J.-J. ^{[5
]}

Wang W.-J. ^{[4
,6
]}

Li J.-X. ^{[4
,6
]}

机构：

[1] Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water Resources, School of Water and Environment, Cha

[2] Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou

[3] Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai

[4] Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai

[5] University of Chinese Academy of Sciences, Beijing

来源：

Environmental Science and Pollution Research | 2024年 / 31卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Activated carbon; Adsorption; High-humidity environment; Ionic liquids;

D O I：

10.1007/s11356-024-33578-2

中图分类号：

学科分类号：

摘要：

Volatile organic compounds (VOCs) frequently pose a threat to the biosphere, impacting ecosystems, flora, fauna, and the surrounding environment. Industrial emissions of VOCs often include the presence of water vapor, which, in turn, diminishes the adsorption capacity and efficacy of adsorbents. This occurs due to the competitive adsorption of water vapor, which competes with target pollutants for adsorption sites on the adsorbent material. In this study, hydrophobic activated carbons (BMIMPF6-AC (L), BMIMPF6-AC (g), and BMIMPF6-AC-H) were successfully prepared using 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF6) to adsorb toluene under humidity environment. The adsorption performance and mechanism of the resulting ionic liquid-modified activated carbon for toluene in a high-humidity environment were evaluated to explore the potential application of ionic liquids as hydrophobic modifiers. The results indicated that BMIMPF6-AC-H exhibited superior hydrophobicity. The toluene adsorption capacity of BMIMPF6-AC-H was 1.53 times higher than that of original activated carbon, while the adsorption capacity for water vapor was only 37.30% of it at 27 °C and 77% RH. The Y-N model well-fitted the dynamic adsorption experiments. To elucidate the microscopic mechanism of hydrophobic modification, the Independent Gradient Model (IGM) method was employed to characterize the intermolecular interactions between BMIMPF6 and toluene. Overall, this study introduces a new modifier for hydrophobic modification of activated carbon, which could enhance the efficiency of activated carbon in treating industrial VOCs. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

引用

页码：35553 / 35566

页数：13