In situ microbial remediation of crude oil-soaked marine sediments using zeolite carrier with a polymer coating.
Mar Pollut Bull
; 129(1): 172-178, 2018 Apr.
Article
em En
| MEDLINE
| ID: mdl-29680535
ABSTRACT
Marine oil spill pollution is an important environmental problem in the world, especially crude oil-soaked marine sediments, because they are difficult to be remediated. In this study, in situ bioremediation of oil-soaked sediment was performed in the middle of the Bohai Sea. Oil-degrading bacteria were adsorbed on powdery zeolite (PZ)/granular zeolites (GZ) surfaces and then wrapped with poly-γ glutamic acid (γ-PGA). Settling column and wave flume experiments were conducted to model marine conditions and to select appropriate biological reagents. The optimal conditions were as follows the average diameter of GZ 3â¯mm, mass ratio of GZ/PZ 21, and concentration of γ-PGA 7%. After bioremediation, over 50% of most oil-spilled pollutants n-alkanes (C12 to C27) and polycyclic aromatic hydrocarbons were degraded in 70â¯days. This work resulted in a successful trial of in situ bioremediation of oil-soaked marine sediments.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Ácido Poliglutâmico
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Bacillus
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Poluentes Químicos da Água
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Petróleo
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Poluição por Petróleo
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Zeolitas
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Sedimentos Geológicos
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article