| Literature DB >> 26398670 |
O Parniakov1, E Apicella2, M Koubaa3, F J Barba4, N Grimi5, N Lebovka1, G Pataro2, G Ferrari6, E Vorobiev3.
Abstract
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 (Yp ≈ 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 (Yp ≈ 0.06). The highest yield of total chlorophylls (Yc ≈ 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 (Yc ≈ 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%.Entities:
Keywords: Chlorophylls; Microalgae; Nannochloropsis; Phenolic compounds; Ultrasound-assisted extraction
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Year: 2015 PMID： 26398670 DOI： 10.1016/j.biortech.2015.09.020
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642