Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 2, Pages 2538-2544Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b05448
Keywords
Lipid extraction; Microalgae; Ionic liquid; Cholinium; Amino acid; EPA
Categories
Funding
- Qponics Pty Ltd
- Australian Endeavour Leadership Program
- Univ. of Western Australia
- Mansoura Univ.
- Ministry of Higher Education, Egypt
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Nannochloropsis sp. has been a very attractive microalgae species because of its high omega-3 fatty acid content. However, it is also one of the species with the strongest cell wall. Currently, energy-intensive mechanical techniques and harmful and flammable organic solvents are used for extracting lipids from Nannochloropsis sp. biomass. Thus, in this study, cholinium [Ch] amino acid-based ionic liquids (ILs) were investigated for their capability to extract lipids from Nannochloropsis sp. Among all the ILs tested, cholinium arginate ([Ch][Arg]) extracted the highest amount leaving only 1.4 +/- 0.2% lipid in the remaining biomass. The extraction was still efficient at room temperature leaving only 7.9 +/- 0.3% lipid. Thus, [Ch][Arg] is an efficient green solvent for Nannochloropsis lipid extraction.
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