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J Hazard Mater

Title:		Effective absorption of dichloromethane using deep eutectic solvents
Author(s):		Mu M; Zhang X; Yu G; Xu R; Liu N; Wang N; Chen B; Dai C;
Address:		"Faculty of Environment and Life, Beijing University of Technology, 100 Ping Le Yuan, Chaoyang District, Beijing 100124, China. Faculty of Environment and Life, Beijing University of Technology, 100 Ping Le Yuan, Chaoyang District, Beijing 100124, China. Electronic address: daicn@bjut.edu.cn"
Journal Title:		J Hazard Mater
Year:		2022
Volume:		20220722
Issue:
Page Number:		129666 -
DOI:		10.1016/j.jhazmat.2022.129666
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Chlorinated volatile organic compounds (VOCs), of which dichloromethane (DCM) has become one of the main components because of its extensive use and strong volatility, are recognized as extremely hazardous and refractory pollutants in the atmosphere. The efficient treatment of DCM is of great significance to the protection of environment and human health. In this work, the strategy of DCM capture with deep eutectic solvents (DESs) with different hydrogen bond acceptors (HBAs) and hydrogen bond donors (HBDs) was proposed and systematically investigated. The experimental results show that tetrabutylphosphonium chloride: levulinic acid ([P(4444)][Cl]-LEV) presents the most excellent DCM absorption capacity among all DESs studied and considerable capacity in [P(4444)][Cl]-LEV (1:2) with 899 mg DCM/g DES (5.58 mol DCM/mol DES) at 30 degrees C and DCM partial pressure of 0.3 bar can be achieved. The microscopic absorption mechanism is explored by (1)HNMR and FT-IR spectra as well as quantum chemistry calculations, indicating that the absorption is a physical process. The interaction energy analysis suggests that the greater the interaction energy between DES and DCM, the greater the saturated absorption capacity of DCM. The hydrogen bond (HB) contributes most to the weak interaction between DCM and HBA/HBD, and both HBA and HBD play an important role in the absorption of DCM"
Keywords:		"*Deep Eutectic Solvents Humans Hydrogen Bonding *Methylene Chloride Solvents/chemistry Spectroscopy, Fourier Transform Infrared Absorption Deep eutectic solvents Dichloromethane Microscopic mechanisms Quantum chemistry calculations;"
Notes:		"MedlineMu, Mingli Zhang, Xinfeng Yu, Gangqiang Xu, Ruinian Liu, Ning Wang, Ning Chen, Biaohua Dai, Chengna eng Research Support, Non-U.S. Gov't Netherlands 2022/07/30 J Hazard Mater. 2022 Oct 5; 439:129666. doi: 10.1016/j.jhazmat.2022.129666. Epub 2022 Jul 22"