Modeling bacterial detachment during transport through porous media as a residence-time-dependent process

W. P. Johnson, K. A. Blue, B. E. Logan, Robert G Arnold

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Bacterial transport through porous media was modeled using detachment functions that incorporate the dependence of detachment rate on bacterial residence time on the collector. Model parameters and the relative merit of alternative forms for the detachment function were evaluated on the basis of comparisons between model simulations and experimentally derived bacterial breakthrough and elution curves. Only detachment functions that provided an initial period into which bacteria were rapidly released, followed by slow bacterial detachment, were able to reproduce the elution portion of the breakthrough curves. It is concluded that both a time-dependent detachment function and a degree of sorption site heterogeneity are required to describe bacterial attachment and detachment during transport as observed in our laboratory. -from Authors

Original languageEnglish (US)
Pages (from-to)2649-2658
Number of pages10
JournalWater Resources Research
Volume31
Issue number11
DOIs
StatePublished - 1995
Externally publishedYes

Fingerprint

porous media
collectors
sorption
Porous materials
porous medium
residence time
simulation models
bacteria
breakthrough curve
modeling
bacterium
simulation
Sorption
Bacteria
laboratory
comparison
rate
parameter

ASJC Scopus subject areas

  • Aquatic Science
  • Environmental Science(all)
  • Environmental Chemistry
  • Water Science and Technology

Cite this

Modeling bacterial detachment during transport through porous media as a residence-time-dependent process. / Johnson, W. P.; Blue, K. A.; Logan, B. E.; Arnold, Robert G.

In: Water Resources Research, Vol. 31, No. 11, 1995, p. 2649-2658.

Research output: Contribution to journalArticle

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AB - Bacterial transport through porous media was modeled using detachment functions that incorporate the dependence of detachment rate on bacterial residence time on the collector. Model parameters and the relative merit of alternative forms for the detachment function were evaluated on the basis of comparisons between model simulations and experimentally derived bacterial breakthrough and elution curves. Only detachment functions that provided an initial period into which bacteria were rapidly released, followed by slow bacterial detachment, were able to reproduce the elution portion of the breakthrough curves. It is concluded that both a time-dependent detachment function and a degree of sorption site heterogeneity are required to describe bacterial attachment and detachment during transport as observed in our laboratory. -from Authors

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