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Comprehensive GC2/MS for the monitoring of aromatic tar oil constituents during biodegradation in a historically contaminated soil

Paper ID Volume ID Publish Year Pages File Format Full-Text
23904 43482 2012 7 PDF Available
Title
Comprehensive GC2/MS for the monitoring of aromatic tar oil constituents during biodegradation in a historically contaminated soil
Abstract

The constituents of tar oil comprise a wide range of physico-chemically heterogeneous pollutants of environmental concern. Besides the sixteen polycyclic aromatic hydrocarbons defined as priority pollutants by the US-EPA (EPA-PAHs), a wide range of substituted (NSO-PAC) and alkylated (alkyl-PAC) aromatic tar oil compounds are gaining increased attention for their toxic, carcinogenic, mutagenic and/or teratogenic properties.Investigations on tar oil biodegradation in soil are in part hampered by the absence of an efficient analytical tool for the simultaneous analysis of this wide range of compounds with dissimilar analytical properties. Therefore, the present study sets out to explore the applicability of comprehensive two-dimensional gas chromatography (GC2/MS) for the simultaneous measurement of compounds with differing polarity or that are co-eluting in one-dimensional systems.Aerobic tar oil biodegradation in a historically contaminated soil was analyzed over 56 days in lab-scale bioslurry tests. Forty-three aromatic compounds were identified with GC2/MS in one single analysis. The number of alkyl chains on a molecule was found to prime over alkyl chain length in hampering compound biodegradation. In most cases, substitution of carbon with nitrogen and oxygen was related to increased compound degradation in comparison to unalkylated and sulphur- or unsubstituted PAH with a similar ring number.The obtained results indicate that GC2/MS can be employed for the rapid assessment of a large variety of structurally heterogeneous environmental contaminants. Its application can contribute to facilitate site assessment, development and control of microbial cleanup technologies for tar oil contaminated sites.

► Simultaneous detection of multiple tar oil constituents with GC2/MS. ► Identified constituents comprise EPA-, heterocyclic, cyclic and alkylated aromatic compounds. ► ‘Fingerprinting’ of complex pollutant mixtures during microbial degradation.

Keywords
Tar oil; Heterocyclic aromatic hydrocarbons; Polycyclic aromatic hydrocarbons; Alkylated aromatic compounds; Contaminated soil; Bioremediation; Biodegradation; Comprehensive GCxGC/MS; GC2/MS
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Comprehensive GC2/MS for the monitoring of aromatic tar oil constituents during biodegradation in a historically contaminated soil
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 157, Issue 4, 20 February 2012, Pages 460–466
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us