my.chemeurope.com
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
Abstract
Biodegradation of organic compounds during transport in aquifer systems has become an important issue in applying bioaugmentation to a target area. In this study, we conducted a set of laboratory column experiments for various patterns of solutes, that is, KCl only, toluene only, toluene and bacterium Pseudomonas putida, to investigate how the processes of sorption, biodegradation, and bacteria affect the fate of toluene during transport through quartz sand. The column experiments revealed that (i) sorption of toluene onto sand occurred irreversibly with a mass loss of 35% without any retardation, (ii) biodegradation also occurred but to a lesser extent (∼21%) than the irreversible sorption, and (iii) for the case of toluene and bacterium, a rather long tailing was present in the effluent concentraion curves of bacterium and toluene. The tailing of bacterial curve can be explained by the secondary energy minimum of DLVO theory. The tailing of toluene curve was attributed to the sorption of toluene onto bacterial cells during transport which was evidenced by the separate biosorption test. This implies that sorption does not affect directly the microbial activity, and the bacterium Pseudomonas putida can impact toluene transport positively (mass loss via biodegradation) as well as negatively (mass added via enhancement) upon simultaneous introduction into the aquifer. These results would provide valuable information on the design of bioaugmentation scheme for bioremediation of groundwater contaminated with BTEX compounds. © 2011 American Institute of Chemical Engineers Environ Prog, 2011
| Authors: | Chung, S.G.; Kim, D.J.; Choi, J.W.; Lee, S.H. | |
| Journal: | Environmental Progress | |
| Volume: | 31 | |
| Issue: | 2 | |
| Year: | 2012 | |
| Pages: | 318 | |
| DOI: | 10.1002/ep.10550 | |
| Publication date: | 01-07-2012 |
Watchlist
This is where you can add this publication to your personal favourites.
Additional Information
Vesicle‐Mediated Growth of Tubular Branches and Centimeter‐Long Microtubes from a Single Molecule
Abstract The mechanism by which small molecules assemble into microscale tubular structures in aqueous solution remains poorly understood, particularly when the initial building blocks are non‐amphiphilic molecules and no surfactant is used. It is here shown how a subnanometric molecule ... more
The image illustrates a natural phenomenon of droplet formation caused by the condensation of vapor on a nonwettable surface at temperature below the dew point. Real‐time observing the light scattered from the droplets may lead to a new mechanism for vapor sensing. However, the dew point ... more
NO is a key vasodilator in mammalian cardiovascular systems and has been shown to sensitize tissue to γ‐radiation. However, photochemical NO precursors that can be activated by these NIR wavelengths are extremely limited. G. D. Stucky, D. Zhao, P. C. Ford, F. Zhang and co‐workers have ad ... more
Bioengineers Succeed in Producing Plastic Without the use of Fossil Fuels
A team of pioneering South Korean scientists have succeeded in producing the polymers used for everyday plastics through bioengineering, rather than through the use of fossil fuel based chemicals. This groundbreaking research, which may now allow for the production of environmentally consci ... more
In the past, restoration of paintings and other old artwork often involved application of acrylic resins to consolidate and protect them. One of the most important tasks for modern restorers is thus to remove these layers, because it turns out that acrylic resins not only drastically change ... more
Is trash the solution to tackling climate change?
Converting the trash that fills the world's landfills into biofuel may be the answer to both the growing energy crisis and to tackling carbon emissions, claim scientists in Singapore and Switzerland. New research published in Global Change Biology: Bioenergy, reveals how replacing gasoline ... more
Über CHEMIE.DE
CHEMIE.DE Information Service GmbH runs specialist scientific internet portals. The secret to our success? We are familiar with what we publish.
Advertising at CHEMIE.DE
Our advertising formats support you in getting your message across to a clearly defined target audience.
© 1997-2013 CHEMIE.DE Information Service GmbH, All rights reserved
Netmeeting
