Biodegradation of oxadiazon by a soil isolated Pseudomonas fluorescens strain CG5: Implementation in an herbicide removal reactor and modelling

Water Research
Carlos GarbiMargarita Martín

Abstract

An oxadiazon-degrading bacterial, Pseudomonas strain CG5, was isolated from an agricultural contaminated soil. This strain CG5 was able to grow on 10mg of oxadiazon per l, yielding 5.18+/-0.2 mg of protein biomass mol(-1). GC-MS analyses of the metabolites from oxadiazon catabolism revealed its dehalogenation and degradation to form non-toxic end-products, cells were then immobilized by adsorption on a ceramic support to be used as biocatalysts in herbicide removal biofilm-reactor processes. Seventy-two per cent of the oxadiazon was removed, and the maximum specific substrate uptake rate was 10.63+/-0.5 microg h(-1) mg(-1) prot. A new mathematical model was developed to interpret and predict the behaviour of the bacteria and pollutants in a biofilm-reactor system, to consider biofilm structural and morphological properties.

References

Mar 4, 2000·Applied and Environmental Microbiology·M MartínE Ferrer
Jun 17, 2000·Trends in Biotechnology·C NicolellaS J Heijnen
Nov 5, 2004·Applied Microbiology and Biotechnology·Mariela SánchezMargarita Martín

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Citations

Jul 17, 2007·Bioresource Technology·Paloma PinillaMaría José Martínez-Iñigo
Apr 7, 2011·Water Environment Research : a Research Publication of the Water Environment Federation·A Castro-GonzálezG Merino-Castro

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