Structural effects of ionic liquids on microalgal growth inhibition and microbial degradation

Environmental Science and Pollution Research International
Thi Phuong Thuy PhamYeoung-Sang Yun

Abstract

In the present study, we investigated structural effects of various ionic liquids (ILs) on microalgal growth inhibition and microbial biodegradability. For this, we tested pyridinium- and pyrrolidinium-based ILs with various alkyl chain lengths and bromide anion, and compared the toxicological effects with log EC50 values of imidazolium-based IL with the same alkyl chains and anion from literature. Comparing determined EC50 values of cationic moieties with the same alkyl chain length, pyridinium-based ILs were found to be slightly more toxic towards the freshwater green alga, Pseudokirchneriella subcapitata, than a series of pyrrolidinium and imidazolium except to 1-octyl-3-methylimidazolium bromide. Concerning the biodegradation study of 12 ILs using the activated sludge microorganisms, the results showed that the pyridinium derivatives except to 1-propyl-3-methylpyridinium cation were degraded. Whereas in case of imidazolium- and pyrrolidinium-based compounds, only n-hexyl and n-octyl substituted cations were fully degraded but no significant biodegradation was observed for the short chains (three and four alkyl chains).

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Citations

Apr 11, 2017·ChemSusChem·Susana P F CostaM Lúcia M F S Saraiva
Mar 14, 2018·Environmental Science and Pollution Research International·Ming LiDaolin Du
Jun 24, 2017·Environmental Science and Pollution Research International·Robert BiczakJanusz Kapuśniak
Jul 6, 2017·International Journal of Molecular Sciences·Krystian MiazekDorothee Goffin
May 12, 2021·The Science of the Total Environment·Chul-Woong ChoYeoung-Sang Yun
Aug 29, 2021·Journal of Applied Toxicology : JAT·Rachel P FrawleyKristen Ryan

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