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Biodegradation of imidazolium ionic liquids by activated sludge microorganisms

(2015) BIODEGRADATION. 26(6). p.453-463
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Abstract
Biological properties of ionic liquids (ILs) have been usually tested with the help of standard biodegradation or ecotoxicity tests. So far, several articles on the identification of intermediate metabolites of microbiological decay of ILs have been published. Simultaneously, the number of novel ILs with unrecognized characteristics regarding biodegradability and effect on organisms and environment is still increasing. In this work, seven imidazolium ionic liquids of different chemical structure were studied. Three of them are 1-alkyl-3-methyl-imidazolium bromides, while the other four are tetra- or completely substituted imidazolium iodides. This study focused on the identification of intermediate metabolites of the aforementioned ionic liquids subjected to biodegradation in a laboratory activated sludge system. Both fully substituted ionic liquids and 1-ethyl-3-methyl-imidazolium bromide were barely biodegradable. In the case of two of them, no biotransformation products were detected. The elongation of the alkyl side chain made the IL more susceptible for microbiological decomposition. 1-Decyl-3-methyl-imidazolium bromide was biotransformed most easily. Its primary biodegradation up to 100 % could be achieved. Nevertheless, the cleavage of the imidazolium ring has not been observed.
Keywords
Biodegradation, Activated sludge, Imidazolium ionic liquids, Intermediate metabolites, Mass spectrometry, SEWAGE-SLUDGE, 1-METHYL-3-OCTYLIMIDAZOLIUM CHLORIDE, IDENTIFICATION, DEGRADATION, SORPTION, REMOVAL, CATIONS

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Citation

Please use this url to cite or link to this publication:

MLA
Liwarska-Bizukojc, Ewa, Cédric Maton, and Christian Stevens. “Biodegradation of Imidazolium Ionic Liquids by Activated Sludge Microorganisms.” BIODEGRADATION 26.6 (2015): 453–463. Print.
APA
Liwarska-Bizukojc, E., Maton, C., & Stevens, C. (2015). Biodegradation of imidazolium ionic liquids by activated sludge microorganisms. BIODEGRADATION, 26(6), 453–463.
Chicago author-date
Liwarska-Bizukojc, Ewa, Cédric Maton, and Christian Stevens. 2015. “Biodegradation of Imidazolium Ionic Liquids by Activated Sludge Microorganisms.” Biodegradation 26 (6): 453–463.
Chicago author-date (all authors)
Liwarska-Bizukojc, Ewa, Cédric Maton, and Christian Stevens. 2015. “Biodegradation of Imidazolium Ionic Liquids by Activated Sludge Microorganisms.” Biodegradation 26 (6): 453–463.
Vancouver
1.
Liwarska-Bizukojc E, Maton C, Stevens C. Biodegradation of imidazolium ionic liquids by activated sludge microorganisms. BIODEGRADATION. 2015;26(6):453–63.
IEEE
[1]
E. Liwarska-Bizukojc, C. Maton, and C. Stevens, “Biodegradation of imidazolium ionic liquids by activated sludge microorganisms,” BIODEGRADATION, vol. 26, no. 6, pp. 453–463, 2015.
@article{7220814,
  abstract     = {Biological properties of ionic liquids (ILs) have been usually tested with the help of standard biodegradation or ecotoxicity tests. So far, several articles on the identification of intermediate metabolites of microbiological decay of ILs have been published. Simultaneously, the number of novel ILs with unrecognized characteristics regarding biodegradability and effect on organisms and environment is still increasing. In this work, seven imidazolium ionic liquids of different chemical structure were studied. Three of them are 1-alkyl-3-methyl-imidazolium bromides, while the other four are tetra- or completely substituted imidazolium iodides. This study focused on the identification of intermediate metabolites of the aforementioned ionic liquids subjected to biodegradation in a laboratory activated sludge system. Both fully substituted ionic liquids and 1-ethyl-3-methyl-imidazolium bromide were barely biodegradable. In the case of two of them, no biotransformation products were detected. The elongation of the alkyl side chain made the IL more susceptible for microbiological decomposition. 1-Decyl-3-methyl-imidazolium bromide was biotransformed most easily. Its primary biodegradation up to 100 % could be achieved. Nevertheless, the cleavage of the imidazolium ring has not been observed.},
  author       = {Liwarska-Bizukojc, Ewa and Maton, Cédric and Stevens, Christian},
  issn         = {0923-9820},
  journal      = {BIODEGRADATION},
  keywords     = {Biodegradation,Activated sludge,Imidazolium ionic liquids,Intermediate metabolites,Mass spectrometry,SEWAGE-SLUDGE,1-METHYL-3-OCTYLIMIDAZOLIUM CHLORIDE,IDENTIFICATION,DEGRADATION,SORPTION,REMOVAL,CATIONS},
  language     = {eng},
  number       = {6},
  pages        = {453--463},
  title        = {Biodegradation of imidazolium ionic liquids by activated sludge microorganisms},
  url          = {http://dx.doi.org/10.1007/s10532-015-9747-0},
  volume       = {26},
  year         = {2015},
}

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