Production, Characterization and Bioemulsifying Activity of an Exopolysaccharide Produced by Sphingomonas sp. Isolated from Freshwater

Journal Article · Fri Dec 15 04:00:00 EST 2017 · Journal of Polymers and the Environment

DOI:https://doi.org/10.1007/S10924-016-0878-0· OSTI ID:22788378

Meneghine, Aylan Kener ^[1]; Moretto, Cristiane; Castellane, Tereza Cristina Luque ^[2]

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1. Univ. Estadual Paulista, UNESP campus de Jaboticabal, Programa de Pós-graduação em Microbiologia Agropecuária (Brazil)
2. Univ. Estadual Paulista, UNESP campus de Jaboticabal, Laboratório de Bioquímica de Micro-organismos e de Plantas, Departamento de Tecnologia (Brazil)

This study aimed to evaluate the emulsion stability of solutions containing exopolysaccharide and culture medium of a Sphingomonas sp. strain with various hydrophobic compounds. The exopolysaccharide characterized belongs to a sphingan group, however, not being a gellan gum as produced by certain Sphingomonas strains. In general, the emulsifying indexes found in this study were above 70% for gasoline, hexane, kerosene and used frying oil. Nonetheless, the best results were achieved in kerosene solutions, which showed an index of 80% after 24 h, remaining stable for more than 168 h in combinations with various EPS concentrations. Interestingly, diesel oil best results were singly achieved in solution pH of 11, showing an index of around 65%. Furthermore, hexane obtained an index of 100% after 24 h when culture medium was used. Thus, these findings highlight the use of EPS as a potential bioemulsifier agent to enhance hydrocarbon degradation and emulsification effects in environmental biotechnology.

• OSTI ID: 22788378
• Journal Information: Journal of Polymers and the Environment, Journal Name: Journal of Polymers and the Environment Journal Issue: 4 Vol. 25; ISSN 1566-2543
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BIOTECHNOLOGY
CULTURE MEDIA
EMULSIFICATION
ENVIRONMENTAL PROTECTION
FRESH WATER
GASOLINE
HEXANE
KEROSENE
OILS
PH VALUE
POLYSACCHARIDES
SOLUTIONS