Nonequilibrium transport of organic chemicals: The impact of pore-water velocity

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

The impact of variations in pore-water velocity on the nonequilibrium sorption and transport of organic chemicals was investigated. Miscible displacement experiments were performed with four organic chemicals (dichlorobenzene, naphthalene, tetrachloroethene and p-xylene) and three aquifer materials having low organic-carbon contents (0.02-0.1%). The results of the experiments were analyzed by using a one-dimensional advective-dispersive transport model, wherein sorption is considered instantaneous for a fraction of the sorbent and rate-limited for the remainder. An inverse relationship between the reverse sorption rate constant and the equilibrium sorption constant was evident for each of two velocities. However, there was an order-of-magnitude difference between the rate constants obtained at the two velocities. This suggests the existence of a time-scale effect, which must be accounted for when modeling the transport of organic solutes.

Original languageEnglish (US)
Pages (from-to)353-368
Number of pages16
JournalJournal of Contaminant Hydrology
Volume9
Issue number4
DOIs
StatePublished - 1992

Fingerprint

Organic Chemicals
Sorption
porewater
sorption
Water
Rate constants
Tetrachloroethylene
tetrachloroethylene
scale effect
xylene
Sorbents
Organic carbon
naphthalene
Aquifers
solute
advection
experiment
Experiments
organic carbon
aquifer

ASJC Scopus subject areas

  • Environmental Chemistry
  • Water Science and Technology
  • Earth-Surface Processes

Cite this

Nonequilibrium transport of organic chemicals : The impact of pore-water velocity. / Brusseau, Mark L.

In: Journal of Contaminant Hydrology, Vol. 9, No. 4, 1992, p. 353-368.

Research output: Contribution to journalArticle

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