NDLI: Bioavailability of pentachlorophenol to acclimatised bacteria under batch and flow-through conditions

Content Provider	Springer Nature Link
Author	Dudal, Y. Jacobson, A. R. Samson, R. Deschênes, L.
Copyright Year	2004
Abstract	Biodegradation of organic contaminants in multi-phase systems, such as soils and aquifers, is often limited by the extent and the rate of contaminant sorption onto the solid matrix. However, information about biodegradation in complex matrices is largely limited to studies of closed systems under batch conditions in which potential bioavailability is characterised by the aqueous-phase concentration of a contaminant. There is little knowledge regarding the influence of flow-through conditions on the availability of contaminants to microbes (contaminant bioavailability). Thus, the aim of this study was to assess and compare contaminant bioavailability, in the presence of a sorptive medium, under both batch and flow-through conditions. Accordingly, experiments were designed in which pentachlorophenol (PCP) was introduced into a mixture of inoculated silica sand and a PCP-retaining resin, under either batch or flow-through (columns) conditions. The results indicated that an increase in the amount of resin (0.1–0.2 g) clearly lowered PCP availability to microbes after 170 h under batch conditions (30 and 45% respectively); whereas, the initial decrease in bioavailability observed under flow-through conditions (45 and 70% respectively) was reversed and no longer observable after 170 h. This increase in PCP availability was linked to an improvement in the contaminant biodegradation capacity from 0.03 to 0.13 mg·l−1·h−1 over 200 h.
Starting Page	460
Ending Page	465
Page Count	6
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	63
Issue Number	4
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-03-26
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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