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SHEDDING LIGHT ON THE BIOAVAILABILITY OF ORGANIC POLLUTANTS

  • Conference paper
Bioremediation of Soils Contaminated with Aromatic Compounds

Part of the book series: NATO Science Series ((NAIV,volume 76))

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Abstract

A new solvent-responsive gene locus, designated sepABC and a divergently transcribed sepR, (sep for solvent efflux pump), was found downstream of the two-component todST signal transduction phosphorelay system that regulates toluene degradation (the tod pathway) in Pseudomonas putida F1 (PpF1). We have made use of this new property, a non-catabolic promoter, in combination with a luxCDABE gene cassette to create a second generation whole-cell bioluminescent biosensor, of name PpF1G4. The response of this new biosensor to a wide range of aromatic hydrocarbons as well as a number of ubiquitous multicomponent non-aqueous phase liquids (NAPLs), including gasoline, JP-4 jet fuel, diesel, coal tar creosote and three varieties of crude oil was demonstrated. PpF1G4 was also assessed as a new environmental tool for a direct measurement of the bioavailability of hydrophobic organic compounds (HOCs) partitioned into surfactant micelles. In general, the results of this study demonstrated the utility of a novel bioreporter system capable of direct measurement of bioavailability of HOCs by the judicious choice of non-ionic surfactants.

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Keane, A., Ghoshal, S., Phoenix, P., Lau, P.C. (2007). SHEDDING LIGHT ON THE BIOAVAILABILITY OF ORGANIC POLLUTANTS. In: Heipieper, H.J. (eds) Bioremediation of Soils Contaminated with Aromatic Compounds. NATO Science Series, vol 76. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5693-2_10

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