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D ‐Galactose based hydrophobic ionic liquid: A new adsorbent for the removal of C d 2+ ions from aqueous solution
Author(s) -
Jayachandra R.,
Reddy S. Rajasekhara,
Lakshmipathy R.
Publication year - 2019
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12948
Subject(s) - physisorption , aqueous solution , adsorption , ionic liquid , chemistry , sorption , exothermic reaction , ion , exothermic process , inorganic chemistry , hydrophobic effect , organic chemistry , catalysis
The present study reports the synthesis of D‐galactose based hydrophobic ionic liquid (IL) and its potential application in the removal of Cd 2+ ions from aqueous solution. The synthesized D‐galactose based hydrophobic ionic liquid is insoluble in water and stable at room temperature as a solid. Batch adsorption studies were carried out to investigate the sorption capacity of IL toward Cd 2+ ions. The experimental data was analyzed with various isotherm and kinetic models to understand the adsorption process. The Arrhenius activation energy was found to be 12.7 and 22.5 kJ/mol, respectively, for 10 and 30 mg/L of initial metal ion concentration suggesting physisorption of Cd 2+ ions on to IL. The thermodynamic parameters suggest that the present process is spontaneous and exothermic in nature. The present IL exhibited superior adsorption capacity toward Cd 2+ ions in presence of other co‐cations in aqueous solution. These results suggest that, the synthesized IL can be a superior adsorbent for the removal of Cd 2+ ions from aqueous solution. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S139–S145, 2019