DSpace
 

DSpace at IIT Bombay >
IITB Publications >
Article >

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/9612

Title: Effect of an emulsifying surfactant on diesel degradation by cultures exhibiting inducible cell surface hydrophobicity
Authors: MOHANTY, G
MUKHERJI, S
Keywords: mixed-bacterial culture
crude-oil
micellar solubilization
nonionic surfactants
biodegradation
bioavailability
hydrocarbons
strain
phase
soil
Issue Date: 2007
Publisher: JOHN WILEY & SONS LTD
Citation: JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, 82(11), 1004-1011
Abstract: Background: Accumulation of petroleum hydrocarbons in the environment is often attributed to inherently slow degradation rates. This study was conducted to determine if diesel biodegradation by cultures exhibiting inducible cell surface hydrophobicity could be enhanced by addition of a chemical surfactant promoting emulsification. Experiments were designed to determine quantitatively the enhancement in diesel degradation caused by Triton X-100 for two bacterial cultures, Exiguobacterium aurantiacum and Burkholderia cepacia. Results: In the presence of Triton X-100 at twice the critical micelle concentration (CMC) the extent of degradation in whole diesel in 5 days was 1.6-1.8 times that observed over 15 days with no surfactant. The enhancement in overall degradation of diesel range resolved peaks (DRRP, representing n-alkanes and branched alkanes) was 1.76 and 1.26 times for E. aurantiacum and B. cepacia cultures respectively. Although an enhancement in decay rate was observed for all n-alkane components, it was most significant for C19, C25 and pristane. Conclusion: For cultures exhibiting direct interfacial uptake, the beneficial effect of an emulsifying surfactant found here is in contrast to earlier studies reporting a detrimental effect due to detachment of cells from the oil/water interface. Surfactant addition may have significant potential in enhancing degradation of the more recalcitrant components. (C) 2007 Society of Chemical Industry
URI: http://dx.doi.org/10.1002/jctb.1753
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9612
http://hdl.handle.net/10054/9612
ISSN: 0268-2575
Appears in Collections:Article

Files in This Item:

There are no files associated with this item.

View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback