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Multiphase flow behavior of diesel in bog, fen, and swamp peats.

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Title: Multiphase flow behavior of diesel in bog, fen, and swamp peats.
Authors: Gupta, Pankaj Kumar1 (AUTHOR) pk3gupta@uwaterloo.ca, Gharedaghloo, Behrad1,2 (AUTHOR), Price, Jonathan S.1 (AUTHOR)
Source: Journal of Contaminant Hydrology. Apr2023, Vol. 255, pN.PAG-N.PAG. 1p.
Subjects: Multiphase flow, Bogs, Peat, Hydraulic structures, Water table, Diesel motors, Drainage, Hydraulic conductivity
Abstract: Hydrocarbon fate and transport in various categories of peatlands is complicated by the botanical origin, and thus variations in the hydraulic structures and surface chemistry of its peat soils. There has been no systematic evaluation of the role of different peat types on hydrocarbon migration. Thus, two-phase, and three-phase flow experiments were performed for living and partially decomposed peat cores from bog, fen, and swamp peatlands. Numerical simulations of water drainage were performed using HYDRUS-1D, diesel-water and diesel-water-air flow using MATLAB Reservoir Simulation Toolbox (MRST). Five water table (WT) fluctuations were imposed to explore its potential to reduce residual diesel saturation in peat columns. Our results demonstrate a good match of the relative water permeability (k rw) – saturation (S) relations estimated using the unsaturated hydraulic conductivity- S relation derived from HYDRUS-1D modeling of two-phase flow, and k rw – S from MRST for three-phase flow, for all tested peat columns. Thus, we recommended using two-phase system based k rw – S predictions if multiphase data are unavailable for peatland sites' spill management plans. We found the discharge of water and diesel both increase with increasing hydraulic conductivity, while residual water and diesel were within the range of 0.42–0.52 and of 0.04–0.11, respectively. High diesel discharge rates suggest that quick spill-response is required to manage its spread in peatlands. Up to 29% of residual diesel saturation was yielded by the five WT fluctuations, and thus we strongly recommend WT manipulation as a first step towards diesel decontamination progression in peatlands. [Display omitted] • This work is the first to report the role of different peat types on NAPL flow. • Rapid flow of NAPL in the near-surface bog peat followed by the fen and swamp. • Water table fluctuations reduce residual NAPL saturation by ∼29%. • Water table manipulation advised as first step towards NAPL spill in peatlands. [ABSTRACT FROM AUTHOR]
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.)
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Header DbId: egs
DbLabel: Engineering Source
An: 163308592
AccessLevel: 6
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PubTypeId: academicJournal
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  Label: Title
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  Data: Multiphase flow behavior of diesel in bog, fen, and swamp peats.
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  Data: <searchLink fieldCode="AR" term="%22Gupta%2C+Pankaj+Kumar%22">Gupta, Pankaj Kumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pk3gupta@uwaterloo.ca</i><br /><searchLink fieldCode="AR" term="%22Gharedaghloo%2C+Behrad%22">Gharedaghloo, Behrad</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Price%2C+Jonathan+S%2E%22">Price, Jonathan S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Contaminant+Hydrology%22">Journal of Contaminant Hydrology</searchLink>. Apr2023, Vol. 255, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Multiphase+flow%22">Multiphase flow</searchLink><br /><searchLink fieldCode="DE" term="%22Bogs%22">Bogs</searchLink><br /><searchLink fieldCode="DE" term="%22Peat%22">Peat</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulic+structures%22">Hydraulic structures</searchLink><br /><searchLink fieldCode="DE" term="%22Water+table%22">Water table</searchLink><br /><searchLink fieldCode="DE" term="%22Diesel+motors%22">Diesel motors</searchLink><br /><searchLink fieldCode="DE" term="%22Drainage%22">Drainage</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulic+conductivity%22">Hydraulic conductivity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Hydrocarbon fate and transport in various categories of peatlands is complicated by the botanical origin, and thus variations in the hydraulic structures and surface chemistry of its peat soils. There has been no systematic evaluation of the role of different peat types on hydrocarbon migration. Thus, two-phase, and three-phase flow experiments were performed for living and partially decomposed peat cores from bog, fen, and swamp peatlands. Numerical simulations of water drainage were performed using HYDRUS-1D, diesel-water and diesel-water-air flow using MATLAB Reservoir Simulation Toolbox (MRST). Five water table (WT) fluctuations were imposed to explore its potential to reduce residual diesel saturation in peat columns. Our results demonstrate a good match of the relative water permeability (k rw) – saturation (S) relations estimated using the unsaturated hydraulic conductivity- S relation derived from HYDRUS-1D modeling of two-phase flow, and k rw – S from MRST for three-phase flow, for all tested peat columns. Thus, we recommended using two-phase system based k rw – S predictions if multiphase data are unavailable for peatland sites' spill management plans. We found the discharge of water and diesel both increase with increasing hydraulic conductivity, while residual water and diesel were within the range of 0.42–0.52 and of 0.04–0.11, respectively. High diesel discharge rates suggest that quick spill-response is required to manage its spread in peatlands. Up to 29% of residual diesel saturation was yielded by the five WT fluctuations, and thus we strongly recommend WT manipulation as a first step towards diesel decontamination progression in peatlands. [Display omitted] • This work is the first to report the role of different peat types on NAPL flow. • Rapid flow of NAPL in the near-surface bog peat followed by the fen and swamp. • Water table fluctuations reduce residual NAPL saturation by ∼29%. • Water table manipulation advised as first step towards NAPL spill in peatlands. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  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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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.jconhyd.2023.104162
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Multiphase flow
        Type: general
      – SubjectFull: Bogs
        Type: general
      – SubjectFull: Peat
        Type: general
      – SubjectFull: Hydraulic structures
        Type: general
      – SubjectFull: Water table
        Type: general
      – SubjectFull: Diesel motors
        Type: general
      – SubjectFull: Drainage
        Type: general
      – SubjectFull: Hydraulic conductivity
        Type: general
    Titles:
      – TitleFull: Multiphase flow behavior of diesel in bog, fen, and swamp peats.
        Type: main
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          Name:
            NameFull: Gupta, Pankaj Kumar
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          Name:
            NameFull: Gharedaghloo, Behrad
      – PersonEntity:
          Name:
            NameFull: Price, Jonathan S.
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          Dates:
            – D: 01
              M: 04
              Text: Apr2023
              Type: published
              Y: 2023
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            – Type: issn-print
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            – Type: volume
              Value: 255
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            – TitleFull: Journal of Contaminant Hydrology
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