期刊
BIORESOURCE TECHNOLOGY
卷 198, 期 -, 页码 262-267出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.09.020
关键词
Microalgae; Nannochloropsis; Ultrasound-assisted extraction; Phenolic compounds; Chlorophylls
资金
- COST Action [TD1104]
- Campania Region [4-17-10]
- University of Technology of Compiegne in France
The aim of this work was to investigate ultrasound (US)-assisted green solvent extraction of valuable compounds from the microalgae Nannochloropsis spp. Individual green solvents (water, ethanol (EtOH), dimethyl sulfoxide (DMSO)) and binary mixture of solvents (water-DMSO and water-EtOH) were used for the extraction procedures. Maximum total phenolic compounds yield (Y-p approximate to 0.33) was obtained after US pre-treatment (W = 400 W, 15 min), being almost 5-folds higher compared to that found for the untreated samples and aqueous extraction (Y-p approximate to 0.06). The highest yield of total chlorophylls (Y-c approximate to 0.043) was obtained after US (W = 400 W, 7.5 min), being more than 9-folds higher than those obtained for the untreated samples and aqueous extraction (Y-c approximate to 0.004). The recovery efficiency decreased as DMSO > EtOH > H2O. The optimal conditions to recover phenolic compounds and chlorophylls from microalgae were obtained after US pre-treatment (400 W, 5 min), binary mixtures of solvents (water-DMSO and water-EtOH) at 25-30%, and microalgae concentration of 10%. (C) 2015 Elsevier Ltd. All rights reserved.
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