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Modelling of physical and reactive processes during biodegradation of a hydrocarbon plume under transient groundwater flow conditions

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Title: Modelling of physical and reactive processes during biodegradation of a hydrocarbon plume under transient groundwater flow conditions
Authors: Prommer, H.1,2 Henning.Prommer@csiro.au, Barry, D.A.1, Davis, G.B.
Source: Journal of Contaminant Hydrology. Nov2002, Vol. 59 Issue 1/2, p113. 19p.
Subjects: Biodegradation, Plumes (Fluid dynamics), Groundwater
Abstract: Numerical experiments of non-reactive and reactive transport were carried out to quantify the influence of a seasonally varying, transient flow field on transport and natural attenuation at a hydrocarbon-contaminated field site. Different numerical schemes for solving advective transport were compared to assess their capability to model low transversal dispersivities in transient flow fields. For the field site, it is shown that vertical plume spreading is largely inhibited, particularly if sorption is taken into account. For the reactive simulations, a biodegradation reaction module for the geochemical transport model PHT3D was developed. Results of the reactive transport simulations show that under the site-specific conditions the temporal variations in groundwater flow do, to a modest extent, affect average biodegradation rates and average total (dissolved) contaminant mass in the aquifer. The model simulations demonstrate that the seasonal variability in groundwater flow only results in significantly enhanced biodegradation rates when a differential sorption of electron donor (toluene) and electron acceptor (sulfate) is assumed. [Copyright &y& Elsevier]
Copyright of Journal of Contaminant Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 7906085
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Modelling of physical and reactive processes during biodegradation of a hydrocarbon plume under transient groundwater flow conditions
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  Data: <searchLink fieldCode="AR" term="%22Prommer%2C+H%2E%22">Prommer, H.</searchLink><relatesTo>1,2</relatesTo><i> Henning.Prommer@csiro.au</i><br /><searchLink fieldCode="AR" term="%22Barry%2C+D%2EA%2E%22">Barry, D.A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Davis%2C+G%2EB%2E%22">Davis, G.B.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Contaminant+Hydrology%22">Journal of Contaminant Hydrology</searchLink>. Nov2002, Vol. 59 Issue 1/2, p113. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Biodegradation%22">Biodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Plumes+%28Fluid+dynamics%29%22">Plumes (Fluid dynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Groundwater%22">Groundwater</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Numerical experiments of non-reactive and reactive transport were carried out to quantify the influence of a seasonally varying, transient flow field on transport and natural attenuation at a hydrocarbon-contaminated field site. Different numerical schemes for solving advective transport were compared to assess their capability to model low transversal dispersivities in transient flow fields. For the field site, it is shown that vertical plume spreading is largely inhibited, particularly if sorption is taken into account. For the reactive simulations, a biodegradation reaction module for the geochemical transport model PHT3D was developed. Results of the reactive transport simulations show that under the site-specific conditions the temporal variations in groundwater flow do, to a modest extent, affect average biodegradation rates and average total (dissolved) contaminant mass in the aquifer. The model simulations demonstrate that the seasonal variability in groundwater flow only results in significantly enhanced biodegradation rates when a differential sorption of electron donor (toluene) and electron acceptor (sulfate) is assumed. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Journal of Contaminant Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/S0169-7722(02)00078-5
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      – Code: eng
        Text: English
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        PageCount: 19
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      – SubjectFull: Biodegradation
        Type: general
      – SubjectFull: Plumes (Fluid dynamics)
        Type: general
      – SubjectFull: Groundwater
        Type: general
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      – TitleFull: Modelling of physical and reactive processes during biodegradation of a hydrocarbon plume under transient groundwater flow conditions
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            NameFull: Prommer, H.
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            NameFull: Barry, D.A.
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              Text: Nov2002
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              Y: 2002
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              Value: 59
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