Biodegradation of benzo[a]pyrene in soil by Mucor sp. SF06 and Bacillus sp. SB02 co-immobilized on vermiculite
Data(s) |
01/11/2006
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Resumo |
Two indigenous microorganisms, Bacillus sp. SB02 and Mucor sp. SF06, capable of degrading polycyclic aromatic hydrocarbons (PAHs) were co-immobilized on vermiculite by physical adsorption and used to degrade benzo[a] pyrene (BaP). The characteristics of BaP degradation by both free and co-immobilized microorganism were then investigated and compared. The removal rate using the immobilized bacterial-fungal mixed consortium was higher than that of the freely mobile mixed consortium. 95.3% of BaP was degraded using the co-immobilized system within 42 d, which was remarkably higher than the removal rate of that by the free strains. The optimal amount of inoculated co-immobilized system for BaP degradation was 2%. The immobilized bacterial-fungal mixed consortium also showed better water stability than the free strains. Kinetics of BaP biodegradation by co-immobilized SF06 and SB02 were also studied. The results demonstrated that BaP degradation could be well described by a zero-order reaction rate equation when the initial BaP concentration was in the range of 10—200 mg/kg. The scanning electronic microscope (SEM) analysis showed that the co-immobilized microstructure was suitable for the growth of SF06 and SB02. The mass transmission process of co-immobilized system in soil is discussed. The results demonstrate the potential for employing the bacterial-fungal mixed consortium, co-immobilized on vermiculite, for in situ bioremediation of BaP.<br /><br /><br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
http://dro.deakin.edu.au/eserv/DU:30009081/n20061494.pdf http://dx.doi.org/10.1016/S1001-0742(06)60063-6 |
Direitos |
2006 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences |
Palavras-Chave | #biodegradation #Bacillus sp. SB02 #Mucor sp. SF06 #benzo[a]pyrene #immobilization #soil pollution |
Tipo |
Journal Article |