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Contribution of suspended and sorbed groundwater bacteria to degradation of dissolved and sorbed aniline

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Author

Summary, in English

The influence of sorption on the mineralisation of 50 mug aniline l(-1) was examined in an aquifer material under batch conditions. The study was designed to distinguish the rates and extent of biodegradation of the sorbed and the dissolved trace organic and the contribution of sorbed and suspended bacteria to the degradation. Four different mathematical models were developed with different assumptions about the partitioning of aniline degradation and bacterial activity between the solid and the aqueous phases. The models were developed by combining an expression for logistic growth of the degrading population with Michaelis-Menten kinetics for the transformation of aniline. It was tested by a series of laboratory experiments conducted with C-14-labelled aniline, aseptically treated aquifer sand and filter-sterilised groundwater in different proportions and bacteria isolated from pristine groundwater. Model evaluation of the experimental data suggested that the fate of aniline was mainly controlled by suspended bacteria degrading both the dissolved and sorbed fractions. The degradation was slow. with a first-order degradation rate equal to 10(-6) h(-1).

Publishing year

2001

Language

English

Pages

234-241

Publication/Series

Applied Microbiology and Biotechnology

Volume

57

Issue

1-2

Document type

Journal article

Publisher

Springer

Topic

  • Ecology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1432-0614