Rate-limited sorption and nonequilibrium transport of organic chemicals in low organic carbon aquifer materials

Mark L Brusseau, T. Larsen, T. H. Christensen

Research output: Contribution to journalArticle

131 Citations (Scopus)

Abstract

Results of miscible displacement experiments performed at two pore water velocities and with very low solution-phase concentrations (30-60 μg l-1) were analyzed using a first-order mass transfer nonequilibrium model, as well as a model employing the local equilibrium assumption. Results of the analyses revealed sorption to be significantly rate limited, possibly by a diffusion-limited mechanism. The impact of rate-limited sorption on transport was dependent upon pore water velocity. The experiments performed at a faster velocity (~1 cm/h) could be successfully simulated only with the nonequilibrium model, whereas the equilibrium model was adequate for the slower-velocity (~0.2 cm/h) experiments. Comparison of experimental results to those reported in the literature revealed that time scale has a significant impact on the degree of nonequilibrium observed in, and on the values of rate constants determined from, experiments. -from Authors

Original languageEnglish (US)
Pages (from-to)1137-1145
Number of pages9
JournalWater Resources Research
Volume27
Issue number6
DOIs
StatePublished - 1991
Externally publishedYes

Fingerprint

Organic Chemicals
Organic carbon
organic compounds
Aquifers
aquifers
sorption
Sorption
organic carbon
aquifer
carbon
porewater
experiment
Experiments
miscible displacement
Water
mass transfer
Rate constants
Mass transfer
water
timescale

ASJC Scopus subject areas

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

Cite this

Rate-limited sorption and nonequilibrium transport of organic chemicals in low organic carbon aquifer materials. / Brusseau, Mark L; Larsen, T.; Christensen, T. H.

In: Water Resources Research, Vol. 27, No. 6, 1991, p. 1137-1145.

Research output: Contribution to journalArticle

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