Modelling the fate of oxidisable organic contaminants in groundwater
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| Title: | Modelling the fate of oxidisable organic contaminants in groundwater |
|---|---|
| Authors: | Barry, D.A.1 d.a.barry@ed.ac.uk, Prommer, H.1 henning.prommer@csiro.au, Miller, C.T.2 casey_miller@unc.edu, Engesgaard, P.3 pe@er.dtu.dk, Brun, A.4 adb@mit.dhi.dk, Zheng, C.5 czheng@ua.edu |
| Source: | Advances in Water Resources. Aug-Dec2002, Vol. 25 Issue 8-12, p945. 39p. |
| Subjects: | Organic compounds, Microbial contamination, Risk assessment |
| Abstract: | Subsurface contamination by organic chemicals is a pervasive environmental problem, susceptible to remediation by natural or enhanced attenuation approaches or more highly engineered methods such as pump-and-treat, amongst others. Such remediation approaches, along with risk assessment or the pressing need to address complex scientific questions, have driven the development of integrated modelling tools that incorporate physical, biological and geochemical processes.We provide a comprehensive modelling framework, including geochemical reactions and interphase mass transfer processes such as sorption/desorption, non-aqueous phase liquid dissolution and mineral precipitatation/dissolution, all of which can be in equilibrium or kinetically controlled. This framework is used to simulate microbially mediated transformation/degradation processes and the attendant microbial population growth and decay. Solution algorithms, particularly the split-operator (SO) approach, are described, along with a brief re´sume´ of numerical solution methods. Some of the available numerical models are described, mainly those constructed using available flow, transport and geochemical reaction packages. The general modelling framework is illustrated by pertinent examples, showing the degradation of dissolved organics by microbial activity limited by the availability of nutrients or electron acceptors (i.e., changing redox states), as well as concomitant secondary reactions. Two field-scale modelling examples are discussed, the Vejen landfill (Denmark) and an example where metal contamination is remediated by redox changes wrought by injection of a dissolved organic compound. A summary is provided of current and likely future challenges to modelling of oxidisable organics in the subsurface. [Copyright &y& Elsevier] |
| Copyright of Advances in Water Resources 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 8575782 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Modelling the fate of oxidisable organic contaminants in groundwater – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Barry%2C+D%2EA%2E%22">Barry, D.A.</searchLink><relatesTo>1</relatesTo><i> d.a.barry@ed.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Prommer%2C+H%2E%22">Prommer, H.</searchLink><relatesTo>1</relatesTo><i> henning.prommer@csiro.au</i><br /><searchLink fieldCode="AR" term="%22Miller%2C+C%2ET%2E%22">Miller, C.T.</searchLink><relatesTo>2</relatesTo><i> casey_miller@unc.edu</i><br /><searchLink fieldCode="AR" term="%22Engesgaard%2C+P%2E%22">Engesgaard, P.</searchLink><relatesTo>3</relatesTo><i> pe@er.dtu.dk</i><br /><searchLink fieldCode="AR" term="%22Brun%2C+A%2E%22">Brun, A.</searchLink><relatesTo>4</relatesTo><i> adb@mit.dhi.dk</i><br /><searchLink fieldCode="AR" term="%22Zheng%2C+C%2E%22">Zheng, C.</searchLink><relatesTo>5</relatesTo><i> czheng@ua.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Advances+in+Water+Resources%22">Advances in Water Resources</searchLink>. Aug-Dec2002, Vol. 25 Issue 8-12, p945. 39p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Organic+compounds%22">Organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Microbial+contamination%22">Microbial contamination</searchLink><br /><searchLink fieldCode="DE" term="%22Risk+assessment%22">Risk assessment</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Subsurface contamination by organic chemicals is a pervasive environmental problem, susceptible to remediation by natural or enhanced attenuation approaches or more highly engineered methods such as pump-and-treat, amongst others. Such remediation approaches, along with risk assessment or the pressing need to address complex scientific questions, have driven the development of integrated modelling tools that incorporate physical, biological and geochemical processes.We provide a comprehensive modelling framework, including geochemical reactions and interphase mass transfer processes such as sorption/desorption, non-aqueous phase liquid dissolution and mineral precipitatation/dissolution, all of which can be in equilibrium or kinetically controlled. This framework is used to simulate microbially mediated transformation/degradation processes and the attendant microbial population growth and decay. Solution algorithms, particularly the split-operator (SO) approach, are described, along with a brief re´sume´ of numerical solution methods. Some of the available numerical models are described, mainly those constructed using available flow, transport and geochemical reaction packages. The general modelling framework is illustrated by pertinent examples, showing the degradation of dissolved organics by microbial activity limited by the availability of nutrients or electron acceptors (i.e., changing redox states), as well as concomitant secondary reactions. Two field-scale modelling examples are discussed, the Vejen landfill (Denmark) and an example where metal contamination is remediated by redox changes wrought by injection of a dissolved organic compound. A summary is provided of current and likely future challenges to modelling of oxidisable organics in the subsurface. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Advances in Water Resources 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/S0309-1708(02)00044-1 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 39 StartPage: 945 Subjects: – SubjectFull: Organic compounds Type: general – SubjectFull: Microbial contamination Type: general – SubjectFull: Risk assessment Type: general Titles: – TitleFull: Modelling the fate of oxidisable organic contaminants in groundwater Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Barry, D.A. – PersonEntity: Name: NameFull: Prommer, H. – PersonEntity: Name: NameFull: Miller, C.T. – PersonEntity: Name: NameFull: Engesgaard, P. – PersonEntity: Name: NameFull: Brun, A. – PersonEntity: Name: NameFull: Zheng, C. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug-Dec2002 Type: published Y: 2002 Identifiers: – Type: issn-print Value: 03091708 Numbering: – Type: volume Value: 25 – Type: issue Value: 8-12 Titles: – TitleFull: Advances in Water Resources Type: main |
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