Low toxicity and high surface activity of sophorolipids from Starmerella bombicola in aquatic species: A preliminary study

Aim : This study was carried out to evaluate aquatic toxicity and surface activity of sophorolipids extracted from yeast Starmerella bombicola. Methodology: The half maximal effective concentration (ECJ values of sophorolipids were determined in three aquatic species, and the surface activity of sop...

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Bibliographic Details
Published in:Journal of environmental biology 2019-07, Vol.40 (4), p.595-600
Main Authors: Kumano, W., Namakoshi, K., Araki, M., Oda, Y., Ueda, A., Hirata, Y.
Format: Article
Language:English
Subjects:
Aquatic life
Aqueous solutions
Bioremediation
Crustaceans
Cyanobacteria
Drug delivery systems
Environmental research
Environmental science
Microorganisms
Oryzias latipes
Shellfish
Surface activity
Surface tension
Surfactants
Syrups & sweeteners
Tension tests
Toxicity
Vegetable oils
Yeast
Yeasts
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Summary:Aim : This study was carried out to evaluate aquatic toxicity and surface activity of sophorolipids extracted from yeast Starmerella bombicola. Methodology: The half maximal effective concentration (ECJ values of sophorolipids were determined in three aquatic species, and the surface activity of sophorolipids in aqueous solutions was examined at ECS0 concentration. Results : The ECS0 of sophorolipid surfactant >473 mg I'1 was found in alga Pseudokirchneriella subcapitata, a median lethal concentration (LCJ of 64.8 mg I'1 in fish Oryzias latipes, whereas a high ECS0 of 48.2 mg I'1 was noted in crustacean Daphnia magna, respectively. Sophorolipids effectively reduced the aquatic surface tension to 39 mN m'1 in O. latipes and to 41 mN m'1 in D. magna. Interpretation : These results show that sophorolipids from S. bombicola are a promising biosurfactant with an ideal balance of low aquatic toxicity and high surface activity.
ISSN:0254-8704
2394-0379
DOI:10.22438/jeb/40/4/MRN-871