000159944 001__ 159944
000159944 005__ 20180317092226.0
000159944 0247_ $$2doi$$a10.1016/j.jconhyd.2008.11.009
000159944 02470 $$2ISI$$a000265047900003
000159944 037__ $$aARTICLE
000159944 245__ $$aQuantification of biodegradation for o-xylene and naphthalene using first order decay models, Michaelis-Menten kinetics and stable carbon isotopes
000159944 269__ $$a2009
000159944 260__ $$c2009
000159944 336__ $$aJournal Articles
000159944 520__ $$aAt a former wood preservation plant severely contaminated with coal tar oil, in situ bulk attenuation and biodegradation rate constants for several monoaromatic (BTEX) and polyaromatic hydrocarbons (PAH) were determined using (1) classical first order decay models, (2) Michaelis-Menten degradation kinetics (MM), and (3) stable carbon isotopes, for o-xylene and naphthalene. The first order bulk attenuation rate constant for o-xylene was calculated to be 0.0025 d(-1) and a novel stable isotope-based first order model, which also accounted for the respective redox conditions, resulted in a slightly smaller biodegradation rate constant of 0.0019 d(-1). Based on MM-kinetics, the o-xylene concentration decreased with a maximum rate of k(max)=0.1 mu g/L/d. The bulk attenuation rate constant of naphthalene retrieved from the classical first order decay model was 0.0038 d(-1). The stable isotope-based biodegradation rate constant of 0.0027 d(-1) was smaller in the reduced zone, while residual naphthalene in the oxic part of the plume further downgradient was degraded at a higher rate of 0.0038 d(-1). With MM-kinetics a maximum degradation rate of k(max)=12 mu g/L/d was determined. Although best fits were obtained by MM-kinetics, we consider the carbon stable isotope-based approach more appropriate as it is specific for biodegradation (not overall attenuation) and at the same time accounts for the dominant electron-accepting process. For o-xylene a field based isotope enrichment factor epsilon(field) of - 1.4 could be determined using the Rayleigh model, which closely matched values from laboratory studies of o-xylene degradation under sulfate-reducing conditions. (C) 2008 Elsevier B.V. All rights reserved.
000159944 6531_ $$aNatural attenuation
000159944 6531_ $$aRedox zones
000159944 6531_ $$aContaminant Plume
000159944 6531_ $$aCompound-specific isotope analysis (CSIA)
000159944 6531_ $$aRate constants
000159944 6531_ $$aPolyaromatic hydrocarbons (PAH)
000159944 6531_ $$aBtex
000159944 6531_ $$aIn-Situ Degradation
000159944 6531_ $$aAir-Force-Base
000159944 6531_ $$aNatural Attenuation
000159944 6531_ $$aAromatic-Hydrocarbons
000159944 6531_ $$aContaminated Aquifer
000159944 6531_ $$aIntrinsic Bioremediation
000159944 6531_ $$aRayleigh Equation
000159944 6531_ $$aMonoaromatic Hydrocarbons
000159944 6531_ $$aAnaerobic Degradation
000159944 6531_ $$aBacterial-Degradation
000159944 700__ $$aBlum, Philipp
000159944 700__ $$aHunkeler, Daniel
000159944 700__ $$aWeede, Matthias
000159944 700__ $$aBeyer, Christof
000159944 700__ $$aGrathwohl, Peter
000159944 700__ $$aMorasch, Barbara
000159944 773__ $$j105$$q118-130$$tJournal Of Contaminant Hydrology
000159944 909CO $$ooai:infoscience.tind.io:159944$$pENAC$$particle
000159944 909C0 $$0252370$$pENAC$$xU10201
000159944 917Z8 $$xWOS-2010-11-30
000159944 937__ $$aEPFL-ARTICLE-159944
000159944 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000159944 980__ $$aARTICLE