Panda Somenath, Fourmentin Sophie
Univ. Littoral Côte d'Opale, UR 4492, UCEIV, Unité de Chimie Environnementale et Interactions sur le Vivant, SFR Condorcet FR CNRS 3417, F-59140, Dunkerque, France.
Environ Sci Pollut Res Int. 2022 Jan;29(1):264-270. doi: 10.1007/s11356-021-16279-y. Epub 2021 Sep 7.
Cyclodextrins (CDs) and deep eutectic solvents (DESs) are emerging absorbent materials for the removal of volatile organic compounds (VOCs). In this study, we have used combination of modified CDs and levulinic acid to form four DESs analogs, referred to as supramolecular low-melting mixtures (LMMs), to study their absorption characteristics towards five VOCs, namely acetaldehyde, butanone, dichloromethane, thiophene, and toluene. The supramolecular LMMs showed up to 250-fold reduction in the vapor-liquid partition coefficients compared to water. The overall absorption capacity found to be synergistic and seemed to be dictated by the hydrophobicity of the VOCs. Toluene and dichloromethane were absorbed at 99 and 95% by the supramolecular LMMs, respectively, even at higher concentrations, with a linear relationship between the concentration and absorption capacity. The LMMs also retained their absorption capacities even after five absorption/desorption cycles.
环糊精（CDs）和低共熔溶剂（DESs）是新兴的用于去除挥发性有机化合物（VOCs）的吸附材料。在本研究中，我们使用改性环糊精和乙酰丙酸的组合形成了四种类似低共熔溶剂的物质，称为超分子低熔点混合物（LMMs），以研究它们对五种VOCs的吸收特性，这五种VOCs分别是乙醛、丁酮、二氯甲烷、噻吩和甲苯。与水相比，超分子LMMs的气液分配系数降低了250倍。发现总体吸收能力具有协同作用，似乎由VOCs的疏水性决定。即使在较高浓度下，超分子LMMs对甲苯和二氯甲烷的吸收率分别达到99%和95%，浓度与吸收能力之间呈线性关系。即使经过五个吸收/解吸循环，LMMs仍保持其吸收能力。
