Flow interruption: A method for investigating sorption nonequilibrium

M. L. Brusseau, P. S.C. Rao, R. E. Jessup, J. M. Davidson

Research output: Contribution to journalArticlepeer-review

151 Scopus citations


A flow-interruption method for investigating sorption nonequilibrium is presented. The technique has a greater sensitivity to nonequilibrium than to traditional column experiments and hence provides a greater capacity to investigate nonequilibrium. The technique may provide more reliable determinations of kinetic parameter values. In some situations, the technique may be used to assist in the delineation of mechanism(s) responsible for sorption nonequilibrium. Use of the technique is demonstrated with miscible displacement of the herbicide 2,4-D through saturated soil columns. The sorption nonequilibrium exhibited by 2,4-D is suggested to be a result of intraorganic matter diffusion. Experimentally determined values of the sorption rate constant show an inverse relationship to organic matter content.

Original languageEnglish (US)
Pages (from-to)223-240
Number of pages18
JournalJournal of Contaminant Hydrology
Issue number3
StatePublished - Aug 1989

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology


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