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Temporal chances in the bioavailability of PAHs in soils.

Semple, Kirk T. and Stokes, J. and Reid, Brian J. (1999) Temporal chances in the bioavailability of PAHs in soils. In: BIOREMEDIATION TECHNOLOGIES FOR POLYCYCLIC AROMATIC HYDROCARBON COMPOUNDS, 1900-01-01.

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Abstract

A study was conducted to investigate the ageing of phenanthrene in soil, and in particular how the ageing process was influenced by the presence and concentration of hydroxypropyl-beta-cyclodextrin (HPCD). [9-C-14]Phenanthrene-spiked soil was aged in the presence and absence of HPCD. In general, an increase in the soil-phenanthrene contact time resulted in decreased extractability and mineralization. It was noted that the highest concentration of HPCD resulted in enhanced loss from the system and there was an observed increase in the recalcitrant fraction of the soil-associated PAH. Lower HPCD concentrations retarded ageing with respect to both bioavailability and mineralization with only small changes observed between time 0 and 84 d. Additionally, this study showed a high degree of agreement between HPCD extraction of phenanthrene with its mineralization by catabolically active microorganisms. In terms of the assessment of the bioavailability of phenanthrene, extraction of contaminated soils with 50 mM HPCD can predict the bioavailability of the PAH to degrading microorganisms. Ultimately, this predictive tool may prove useful for determining the success or failure of bioremediation strategies in the field.}

Item Type: Conference or Workshop Item (Other)
Journal or Publication Title: BIOREMEDIATION TECHNOLOGIES FOR POLYCYCLIC AROMATIC HYDROCARBON COMPOUNDS
Additional Information: 5th International In Situ and On-Site Bioremediation Symposium, SAN DIEGO, CA, APR 19-22, 1999
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 18592
Deposited By: Prof Kirk T. Semple
Deposited On: 27 Oct 2008 14:24
Refereed?: No
Published?: Published
Last Modified: 27 Jul 2012 01:59
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/18592

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