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Cyclodextrin-based supramolecular low melting mixtures: efficient absorbents for volatile organic compounds abatement

  • Cyclodextrin Applications in Pharmacy, Biology, Medicine and Environment
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Abstract

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.

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Acknowledgements

S.P. acknowledges the financial support from Université du Littoral-Côte d’Opale for his post-doctoral fellowship. Fatima Fahri and Tarek Moufawad are greatly acknowledged for their help in experiments.

Funding

This research was supported by Université du Littoral Côte d’Opale.

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S.P.: Performed the experiments, analyzed and interpreted the data, and wrote the paper; S.F.: Conceived and designed the experiments, analyzed and interpreted the data, and wrote the paper.

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Correspondence to Sophie Fourmentin.

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The authors declare no competing interests.

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Panda, ., Fourmentin, S. Cyclodextrin-based supramolecular low melting mixtures: efficient absorbents for volatile organic compounds abatement. Environ Sci Pollut Res 29, 264–270 (2022). https://doi.org/10.1007/s11356-021-16279-y

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  • DOI: https://doi.org/10.1007/s11356-021-16279-y

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