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Biodegradation of benzo[a]pyrene in soil by Mucor sp. SF06 and Bacillus sp. SB02 co-immobilized on vermiculite

Su, Dan, Li, Pei-jun, Stagnitti, Frank and Xiong, Xian-zhe 2006, Biodegradation of benzo[a]pyrene in soil by Mucor sp. SF06 and Bacillus sp. SB02 co-immobilized on vermiculite, Journal of environmental sciences, vol. 18, no. 6, pp. 1204-1209, doi: 10.1016/S1001-0742(06)60063-6.

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Title Biodegradation of benzo[a]pyrene in soil by Mucor sp. SF06 and Bacillus sp. SB02 co-immobilized on vermiculite
Author(s) Su, Dan
Li, Pei-jun
Stagnitti, Frank
Xiong, Xian-zhe
Journal name Journal of environmental sciences
Volume number 18
Issue number 6
Start page 1204
End page 1209
Publisher Elsevier B.V.
Place of publication Amsterdam, The Netherlands
Publication date 2006-11
ISSN 1001-0742
1878-7320
Keyword(s) biodegradation
Bacillus sp. SB02
Mucor sp. SF06
benzo[a]pyrene
immobilization
soil pollution
Summary 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.


Language eng
DOI 10.1016/S1001-0742(06)60063-6
Field of Research 109999 Technology not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences
Persistent URL http://hdl.handle.net/10536/DRO/DU:30009081

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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