English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/11930
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Microcosm experiments of oil degradation by microbial mats

AutorGarcía de Oteyza, Tirso; Grimalt, Joan O.; Llirós, Marc; Esteve, Isabel
Palabras claveMicrocosm experiments
Physico-chemical weathering
Marine environment
Water weathering
Microbial mats
Fecha de publicación15-mar-2006
CitaciónScience of the Total Environment 357(1-3): 12-24 (2006)
ResumenSeveral microcosm experiments were run in parallel to evaluate the efficiency of microbial mats for crude oil degradation as compared with physico-chemical weathering. The oils used in the experiments constituted representative examples of those currently used for commercial purposes. One was aliphatic and of low viscosity (33.4 American Petroleum Institute degrees, °API) and the other was predominantly aromatic, with high sulphur content (ca. 2.7%) and viscosity (16.6°API). After crude oil introduction, the microcosms were kept under cyclic changes in water level to mimic coastal tidal movements.
The transformations observed showed that water weathering leads to more effective and rapid elimination of low molecular weight hydrocarbons than microbial mat metabolism, e.g. n-alkanes with chain length shorter than n-pentadecane or n-heptadecane, regular isoprenoid hydrocarbons with chain length lower than C-16 or C-18 or lower molecular weight naphthalenes. Microbial mats preserved these hydrocarbons from volatilization and water washing. However, hydrocarbons of lower volatility such as the C24–C30 n-alkanes or containing nitrogen atoms, e.g. carbazoles, were eliminated in higher proportion by microbial mats than by water weathering.
The strong differences in composition between the two oils used for the experiments were also reflected in significant differences between water weathering and microbial mat biodegradation. Higher oil viscosity seemed to hinder the former but not the later.
Descripción13 pages, 3 tables, 4 figures.-- PMID: 15935450 [PubMed].-- Available online Jun 1, 2005.
Versión del editorhttp://dx.doi.org/10.1016/j.scitotenv.2005.04.039
Aparece en las colecciones: (IDAEA) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.