Prediction of mass-transfer coefficient for solute transport in porous media

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35 Citations (Scopus)

Abstract

Several previously reported laboratory studies related to transport of solutes through packed columns were utilized to develop predictive relationships for mass-transfer rate coefficient. The data were classified into two groups: those obtained under rate-limited mass transfer between mobile and immobile water regions (physical nonequilibrium conditions), and those derived from rate-limited mass transfer between instantaneous and slow sorption sites (sorption nonequilibrium conditions). The mass-transfer coefficient in all these studies was obtained by fitting breakthrough data to a transport model employing a first-order rate limitations with a 'constant' mass-transfer coefficient, independent of flow conditions. This study demonstrated that the mass-transfer coefficient in these models is dependent on system parameters including pore-water velocity, length-scale, retardation coefficient, and particle or aggregate size. Predictive relationships were developed, through regression analysis, relating mass-transfer coefficient to residence time. The developed relationships adequately estimated previously reported field mass-transfer values. Successful simulations of field desorption data reported by Bahr [J. Contam. Hydrol. 4 (1989) 205] further demonstrate the potential applicability of the developed relationships.

Original languageEnglish
Pages (from-to)1-19
Number of pages19
JournalJournal of contaminant hydrology
Volume50
Issue number1-2
DOIs
Publication statusPublished - 2001

Keywords

  • Mass transfer
  • Physical nonequilibrium
  • Residence time
  • Sorption nonequilibrium
  • Velocity

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology

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