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Effects of Three Ionic Liquids on Microbial Activity of an Organic Soil. Microcalorimetric Study

1
Departamento de Bioquímica del Suelo, IIAG-CSIC, 15780 Santiago de Compostela, Spain
2
Departamento de Bioología Funcional, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
3
NaFoMAT Group, Departamento de Física Aplicada, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
*
Author to whom correspondence should be addressed.
Presented at the 22nd International Electronic Conference on Synthetic Organic Chemistry, 15 November– 15 December 2018; Available Online: https://sciforum.net/conference/ecsoc-22.
Proceedings 2019, 9(1), 8; https://doi.org/10.3390/ecsoc-22-05861
Published: 16 November 2018
PDF [745 KB, uploaded 18 March 2019]

Abstract

: Ionic liquids are considered as a potential green replacement for traditional volatile organic solvents, but their impact on the environment is not sufficiently studied. The effect of the addition of aqueous solutions of different amounts (from 0% to 75%) of three ionic liquids, two based imidazolium, dimethylimidazolium dimethylphosphate ([MMIM][DMP] and 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]) and choline dihydrogen phosphate ([Chol][DHP]) on the microbial activity of an acidic, organic soil, was determined in this work. For this propose, an isothermal microcalorimeter, TAM III of TA Instruments was used. This apparatus allows estimating the variation of the metabolic activity through the variation of the heat released after the addition of the ionic liquids (ILs) to the soil. The results showed that the most toxic IL is [BMIM][BF4] which presented a large stress effect and subsequent death on soil microorganisms for the highest concentration of the IL. On the contrary, [Chol][DHP] showed stimulation of the microbial activity for all the concentrations.
Keywords: ionic liquids; toxicity; isothermal calorimetry; soil microbial activity ionic liquids; toxicity; isothermal calorimetry; soil microbial activity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sixto, T.; Ucha, C.; Trasar-Cepeda, C.; Reyes, O.; Salgado, J. Effects of Three Ionic Liquids on Microbial Activity of an Organic Soil. Microcalorimetric Study. Proceedings 2019, 9, 8.

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