TY - JOUR
T1 - Application of protic ammonium-based ionic liquids with carboxylate anions for phenol extraction from aqueous solution and their cytotoxicity on human cells
AU - Sada Khan, Amir
AU - Ibrahim, Taleb
AU - Akbar, Noor
AU - Khamis, Mustafa I.
AU - Siddiqui, Ruqaiyyah
AU - Nancarrow, Paul
AU - Sabri Mjalli, Farouq
AU - Ahmed Khan, Naveed
AU - Abdel Jabbar, Nabil
N1 - Funding Information:
This work was supported by the American University of Sharjah under grant no. FRG19-L-E13 . We are thankful of Centre of Research in Ionic Liquids (CORIL) , Universiti Teknologi PETRONAS. Malaysia for providing these ILs.
Funding Information:
This work was supported by the American University of Sharjah under grant no. FRG19-L-E13. We are thankful of Centre of Research in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS. Malaysia for providing these ILs.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/15
Y1 - 2021/11/15
N2 - In this work, the removal of phenol from aqueous solution was investigated by screening three ionic liquids (ILs) having one common cation, trioctylammonium (TOA), combined with three different anions, namely 3,4-dimethylbenzoate (IL1), 4-tert-butylbenzoate (IL2), and 4-phenylbutanoate (IL3), at room temperature. The results indicate that [TOA][4-phenylbutanoate] (IL3) gave the best efficiency and, hence, was selected for the optimization of process parameters: pH, contact time, concentration, phase ratio, and temperature. The optimum conditions were found to be pH 5, contact time of 5 min, phase ratio (VIL/Vw) of 1:5, initial concentration of phenol of 3000 ppm, and temperature of 298 K. The extraction thermodynamics were studied, and the enthalpy, entropy, and free energy of partition were evaluated. The modes of interaction of these ILs with phenol were modeled using the Conductor-Like Screening Model for Real Solvent (COSMO-RS). Additionally, the cytotoxicity of these ILs toward human cells was investigated. The results indicate that they possess less toxicity than the more commonly used 1-butyl-1-methylpyrrolidinium bis-(trifluoromethylsulfonyl)imide. It has been concluded from the experimental results that ammonium-based ILs with carboxylate anions are efficient for extraction of phenol from polluted water.
AB - In this work, the removal of phenol from aqueous solution was investigated by screening three ionic liquids (ILs) having one common cation, trioctylammonium (TOA), combined with three different anions, namely 3,4-dimethylbenzoate (IL1), 4-tert-butylbenzoate (IL2), and 4-phenylbutanoate (IL3), at room temperature. The results indicate that [TOA][4-phenylbutanoate] (IL3) gave the best efficiency and, hence, was selected for the optimization of process parameters: pH, contact time, concentration, phase ratio, and temperature. The optimum conditions were found to be pH 5, contact time of 5 min, phase ratio (VIL/Vw) of 1:5, initial concentration of phenol of 3000 ppm, and temperature of 298 K. The extraction thermodynamics were studied, and the enthalpy, entropy, and free energy of partition were evaluated. The modes of interaction of these ILs with phenol were modeled using the Conductor-Like Screening Model for Real Solvent (COSMO-RS). Additionally, the cytotoxicity of these ILs toward human cells was investigated. The results indicate that they possess less toxicity than the more commonly used 1-butyl-1-methylpyrrolidinium bis-(trifluoromethylsulfonyl)imide. It has been concluded from the experimental results that ammonium-based ILs with carboxylate anions are efficient for extraction of phenol from polluted water.
KW - COSMO-RS
KW - Cytotoxicity
KW - Hydrophobic ionic liquids
KW - Phenol
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U2 - 10.1016/j.molliq.2021.117447
DO - 10.1016/j.molliq.2021.117447
M3 - Article
AN - SCOPUS:85115235264
SN - 0167-7322
VL - 342
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 117447
ER -