A laboratory column study on the biodegradation of toluene and methyl tert-butyl ether: The effect of substrate interactions

Title
A laboratory column study on the biodegradation of toluene and methyl tert-butyl ether: The effect of substrate interactions
Authors
정승건김동주이상협최재우
Keywords
Column study; MTBE; Pseudomonas putida; Substrate interaction; Toluene; Toluene-degrading bacterium
Issue Date
2013-04
Publisher
Water, air, and soil pollution
Citation
VOL 224, NO 4, 1530-1-1530-8
Abstract
We investigated the effects of substrate interactions on the degradation of toluene and methyl tertbutyl ether (MTBE) by Pseudomonas putida during transport through quartz sand because of the coexistence of toluene and MTBE in aquifer systems. A laboratory test was conducted for a pulse injection of a toluene and/or MTBE solution with and without bacteria into a saturated sand column. We found that the effect of toluene on MTBE was negative because the mass recovery of MTBE increased by 30 % when toluene was added, whereas the effect of MTBE on toluene degradation was positive because the mass recovery of toluene decreased by 7 %. These results were comparable with those of a previous batch study on substrate interactions which reported that toluene can be more negative than MTBE at concentrations higher than 25 mg/L. This finding indicates that substrate interaction is also an important mechanism, controlling the fate of contaminants during transport through aquifer systems. In addition, bacteria-facilitated transport was also observed for both substrates. Therefore, for an efficient bioremediation scheme, care should be taken for substrate interaction as well as for bacteria-facilitated transport in porous media.
URI
http://pubs.kist.re.kr/handle/201004/44598
ISSN
00496979
Appears in Collections:
KIST Publication > Article
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