Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 244, Issue -, Pages 130-134Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2012.11.018
Keywords
Ionic liquids; 1-Ethyl-3-methylimidazolium acetate; Surface modification; Biosorption; Fermentation by products
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Funding
- Korean Government through NRF [NRL 2008-0060070]
- KETEP [20115020100060]
- KEITI (Eco-Innovation project)
- Chonbuk National University
- Korea Evaluation Institute of Industrial Technology (KEIT) [20115020100060] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study aims to determine whether biosorption can be used for the removal of ionic liquids (ILs), especially their cationic parts, from aqueous media. As a model IL, 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) was used. Five types of bacterial biosorbents were prepared from fermentation wastes through chemical modification of the bacterial surface. Screening study was performed to compare the cationic [EMIM] biosorption capacity among the bacterial biosorbents, indicating that the succinated Escherichia coli biomass (SB-E) was the best biosorbent for removing [EMIM] cations. The [EMIM] biosorption performance of SB-E was evaluated in detail through various experiments. The optimal pH range for [EMIM] biosorption was from 7 to 10, and biosorption equilibrium was reached within 10 min. The maximum uptake of SB-E was also estimated to be 72.6 mg/g, Moreover, [EMIM] cations were easily desorbed from [EMIM]-sorbed SB-E by adding acetic acid. (C) 2012 Elsevier B.V. All rights reserved.
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