Exopolymeric substances (EPS) produced by petroleum microbial consortia

Journal of the Brazilian Chemical Society

Marsaioli, Anita J.¹  PETROBRAS R&D Center, Rio de Janeiro, Brazil¹  Cruz, Georgiana F. da¹  Loh, Watson¹  Santos Neto, Eugênio V. dos¹  Angolini, Célio F. F.¹  University of Campinas, Campinas, Brazil¹ 

关键词: biosurfactant;    MS-ESI;    surface tension;    emulsification index;    hydrocarbon biodegradation;   

DOI  :  10.1590/S0103-50532010000800016

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Microbial consortia recuperated of crude oil samples from the Pampo Sul field, Campos Basin, RJ, produced biosurfactants in mineral media containing glucose and 9,10-dihydrophenantrene, n-nonadecane, nonadecanoic acid, slightly biodegraded crude oil (P1) or heavily biodegraded crude oil (P2) as carbon sources. The production of exopolimeric substances (EPS) and petroleum biodegradation do not necessarily occur simultaneously. The EPS analyses by infrared and eletronspray ionization mass spectrometry (ESI-MS) revealed a mixture of surfactine isoforms. The biosurfactants reduced the surface tension of water and Zinder medium from 72.4 and 55.7 to 28.6 mN m"1. Additionally, this surfactant emulsified different oils in water with performances similar to or better than of a conventional surfactant, Tween 80.

【 授权许可】

Unknown