Assessment of five bioaccessibility assays for predicting the efficacy of petroleum hydrocarbon biodegradation in aged contaminated soils

Dandie, C, Weber, J, Aleer, S, Adetutu, E, Ball, A and Juhasz, A 2010, 'Assessment of five bioaccessibility assays for predicting the efficacy of petroleum hydrocarbon biodegradation in aged contaminated soils', Chemosphere, vol. 81, no. 9, pp. 1061-1068.


Document type: Journal Article
Collection: Journal Articles

Title Assessment of five bioaccessibility assays for predicting the efficacy of petroleum hydrocarbon biodegradation in aged contaminated soils
Author(s) Dandie, C
Weber, J
Aleer, S
Adetutu, E
Ball, A
Juhasz, A
Year 2010
Journal name Chemosphere
Volume number 81
Issue number 9
Start page 1061
End page 1068
Total pages 8
Publisher Pergamon
Abstract In this study, the bioaccessibility of petroleum hydrocarbons in aged contaminated soils (1.6-67gkg -1) was assessed using four non-exhaustive extraction techniques (100% 1-butanol, 100% 1-propanol, 50% 1-propanol in water and hydroxypropyl-?-cyclodextrin) and the persulfate oxidation method. Using linear regression analysis, residual hydrocarbon concentrations following bioaccessibility assessment were compared to residual hydrocarbon concentrations following biodegradation in laboratory-scale microcosms in order to determine whether bioaccessibility assays can predict the endpoint of hydrocarbon biodegradation. The relationship between residual hydrocarbon concentrations following microcosm biodegradation and bioaccessibility assessment was linear (r 2=0.71-0.97) indicating that bioaccessibility assays have the potential to predict the extent of hydrocarbon biodegradation. However, the slope of best fit varied depending on the hydrocarbon fractional range assessed. For the C 10-C 14 hydrocarbon fraction, the slope of best fit ranged from 0.12 to 0.27 indicating that the non-exhaustive or persulfate oxidation methods removed 3.5-8 times more hydrocarbons than biodegradation. Conversely, for the higher molecular weight hydrocarbon fractions (C 29-C 36 and C 37-C 40), biodegradation removed up to 3.3 times more hydrocarbons compared to bioaccessibility assays with the resulting slope of best fit ranging from 1.0-1.9 to 2.0-3.3 respectively
Subject Environmental Biotechnology not elsewhere classified
Environmental Science and Management not elsewhere classified
Keyword(s) Bioaccessibility
Microcosm biodegradation
Organic contaminants
Petroleum hydrocarbons
DOI - identifier 10.1016/j.chemosphere.2010.09.059
Copyright notice © 2010 Elsevier Ltd. All rights
ISSN 0045-6535
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