Nonequilibrium Sorption and Aerobic Biodegradation of Dissolved Alkylbenzenes During Transport in Aquifer Material: Column Experiments and Evaluation of a Coupled-Process Model

Joseph T. Angley, Mark L. Brusseau, W. Lamar Miller, Joseph J. Delflno

Research output: Contribution to journalArticle

70 Scopus citations

Abstract

We investigated the effect of simultaneous sorption and aerobic biodegradation on the transport of several dissolved alkylbenzenes in an aquifer material and evaluated the performance of a coupled-process transport model. First-order biodegradation rate constants decreased with decreasing number of C in the alkyl groups and exhibited a correlation with molecular structure as measured by molecular connectivity. For three series of isomers, the rate constant for the isomer with a substituent in the ortho position was smaller than the rate constants for the other isomers. Predictions obtained with the coupled-process model, wherein sorption was assumed to be rate limited, matched the breakthrough curves better than did predictions obtained with a model wherein sorption was assumed to be instantaneous. Accordingly, the assumptions upon which use of the model was based, e.g., biodegradation occurs only in solution and without a significant acclimation period, and can be simulated with a first-order equation, appear to be valid.

Original languageEnglish (US)
Pages (from-to)1404-1410
Number of pages7
JournalEnvironmental Science and Technology
Volume26
Issue number7
DOIs
StatePublished - Jul 1 1992

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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