Development of a novel kinetic model for the analysis of PAH biodegradation in the presence of lead and cadmium co-contaminants

Journal of Hazardous Materials
Michael E DearyStephen P Cummings

Abstract

We report on the results of a 40 week study in which the biodegradation of 16 US EPA polycyclic aromatic hydrocarbons (PAHs) was followed in microcosms containing soil of high organic carbon content (11%) in the presence and absence of lead and cadmium co-contaminants. The total spiked PAH concentration was 2166mg/kg. Mercury amendment was also made to give an abiotic control. A novel kinetic model has been developed to explain the observed biphasic nature of PAH degradation. The model assumes that PAHs are distributed across soil phases of varying degrees of bioaccessibility. The results of the analysis suggest that overall percentage PAH loss is dependent on the respective rates at which the PAHs (a) are biodegraded by soil microorganisms in pore water and bioaccessible soil phases and (b) migrate from bioaccessible to non-bioaccessible soil phases. In addition, migration of PAHs to non-bioaccessible and non-Soxhlet-extractable soil phases associated with the humin pores gives rise to an apparent removal process. The presence of metal co-contaminants shows a concentration dependent inhibition of the biological degradation processes that results in a reduction in overall degradation. Lead appears to have a marginally greater i...Continue Reading

References

Jun 16, 2000·Applied Microbiology and Biotechnology·M ErikssonA K Borg-Karlson
May 12, 2001·Environmental Science & Technology·L Y WickH Harms
Jul 11, 2002·Chemosphere·S Hwang, T J Cutright
Nov 19, 2002·Applied Microbiology and Biotechnology·S K Lotfabad, M R Gray
Jan 10, 2004·Environmental Toxicology and Chemistry·Michael H HuesemannTim J Fortman
Jul 21, 2004·Environmental Science & Technology·Kirk T SempleHauke Harms
Aug 26, 2004·Environmental Pollution·Andrew Craven, Simon Hoy
Aug 26, 2004·Environmental Pollution·Anders R JohnsenHauke Harms
Dec 23, 2004·Letters in Applied Microbiology·K W WongJ P Obbard
Feb 3, 2005·Environmental and Molecular Mutagenesis·William M BairdBrinda Mahadevan
Mar 2, 2005·Environmental Monitoring and Assessment·P VanhalaH Fritze
May 12, 2005·Environmental Science & Technology·Kristine H Wammer, Catherine A Peters
Jun 15, 2005·Environmental Science & Technology·Kieron J DoickKirk T Semple
Jul 13, 2006·Environmental Toxicology and Chemistry·Christopher D Knightes, Catherine A Peters
Mar 3, 2007·Environmental Science & Technology·Andre J SimpsonMichael H B Hayes
Oct 17, 2007·Environmental Science & Technology·Philipp MayerStefan Trapp
Aug 25, 2009·Journal of Hazardous Materials·S GanH K Ng
Dec 17, 2009·Journal of Hazardous Materials·M PazosM A Sanromán
May 22, 2010·Biodegradation·Mikhail Baboshin, Ludmila Golovleva
Sep 6, 2011·Journal of Hazardous Materials·Albert T Yeung, Ying-Ying Gu
Dec 1, 1980·Environmental Science & Technology·J C MeansW L Banwart
Jul 27, 2012·Environmental Pollution·Lei LuoShuzhen Zhang
Jun 27, 2014·Environmental Science & Technology·Iris K U AdamMatthias Kästner

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