Journal
ENVIRONMENTAL POLLUTION
Volume 157, Issue 11, Pages 3150-3157Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2009.05.012
Keywords
Biodegradation; PAHs; Low molecular weight organic acids; Bacteria
Categories
Funding
- NSFC [20577037, 20777062, 40521003]
- SRFDP [200803840015]
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Biodegradation of dissolved fluorene (Flu), phenanthrene (Ph) and pyrene (Py), three polycyclic aromatic hydrocarbons (PAHs), singly or as a mixture of the three, by two bacterial strains, MEBIC 5140 (Mycobacterium flavescens) and MEBIC 5141 (Mycobacterium scrofulaceum), as well as the effects of low molecular weight organic acids (LMWOAs), e.g. malic acid, citric acid and butyric acid on biodegradation of the three PAHs in mineral salts medium aqueous solution were investigated using a newly established dual-wavelength fluorimetric method. The results showed that biodegradation processes can be monitored simultaneously, quickly and simply by dual-wavelength fluorimetry. Both co-metabolism and inhibitory effects were found during the biodegradation of the three PAHs by MEBIC 5140 and MEBIC 5141. Positive effects of butyric acid and negative effects of citric acid on biodegradation of the three PAHs in a mixture were observed. (C) 2009 Elsevier Ltd. All rights reserved.
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