earticle

영어

The lipids of algal biomass were extracted by using mixtures of ionic liquids (ILs) and methanol, and the fatty acid profiles of extracted lipids were also characterized in this work. ILs which cannot dissolve lipids were chosen selectively to extract lipids from algal biomass. Mixtures of ILs and methanol successfully dissolved biomass leaving lipids insoluble. Total contents of lipids extracted from commercial and cultivated Chlorella vulgaris were 10.6 and 11.1% by conventional Bligh and Dyer’ method, respectively, while the mixture of [Bmim][CF3SO3] and methanol could extract 12.5 and 19.0% of lipids. Multi-parameter regression by linear solvation energy relationship showed that dipolarity/ polarizability and hydrogen bond acidity of ILs play an important role in the extraction of lipids from biomass. Fatty acid profiles of extracted lipids showed wide range distribution from C14 to C24. Especially, C16:0, C16:1, C18:2, and C18:3 fatty acids were dominant in the lipids extracted by using ILs. It means that the extracted lipids from C. vulgaris can be used as a source of biodiesel production. These results show high efficiency of ILs-mediated extraction of lipids from algal biomass.