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The effect of chemical pretreatment on the aerobic microbial degradation of PCB congeners in aqueous systems

  • Published:
Journal of Industrial Microbiology

Abstract

A series of experiments was conducted to examine the effects of chemical pretreatment on biodegradation of14C-labeled PCB congeners in aqueous systems. Fenton's reagent was used to generate hydroxyl radicals (OH) which were successful in partially oxidizing/transforming otherwise recalcitrant molecules of tetrachlorinated PCB, but had little or no impact on the biodegradation of a monochlorinated congener. Application of Fenton's reagent (1% H2O2, 1 mM FeSO4) followed by inoculation with pure culturesPseudomonas sp, strain LB 400 andAlcaligenes eutrophus, strain H850 resulted in the removal of approximately 38% of 2-chlorobiphenyl and 51% of 2,2′, 4,4′-tetrachlorobiphenyl in the form of14CO2. Comparison of the rate and extent of biodegradation of 2,2′, 4,4′-tetrachlorobiphenyl after the application of Fenton's reagent with the dynamic and final level of radioactivity in the aqueous phase of experimental system suggests two possible means of microbial utilization of tetrachlorinated PCB congener altered by chemical oxidation: (a) consumption of the partially oxidized chemical dissolved in the aqueous phase, and (b) direct microbial attack on the transformed compound, which may still be adhered to the solid surface.

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Authors and Affiliations

  1. Institute of Gas Technology, 1700 South Mt Prospect Road, 60018-1804, Des Plaines, IL, USA

    B N Aronstein, J R Paterek, R L Kelley & L E Rice

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  1. B N Aronstein
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  2. J R Paterek
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  3. R L Kelley
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  4. L E Rice
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Aronstein, B.N., Paterek, J.R., Kelley, R.L. et al. The effect of chemical pretreatment on the aerobic microbial degradation of PCB congeners in aqueous systems. Journal of Industrial Microbiology 15, 55–59 (1995). https://doi.org/10.1007/BF01570014

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  • DOI: https://doi.org/10.1007/BF01570014

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