Impact of non-ideal sorption on low-concentration tailing behavior for atrazine transport in two natural porous media

A. Kempf, M. L. Brusseau

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

The impact of non-ideal sorption on atrazine transport was investigated for two sandy porous media with 0.38% and 0.03% organic-carbon contents. In contrast to prior investigations, effluent atrazine concentrations were monitored over a range of five orders of magnitude to examine long-term elution behavior. As characterized by batch-experiments, atrazine experienced nonlinear sorption for both media. The results of the column experiments showed that atrazine exhibited extensive elution tailing (delayed approach to relative concentration of zero). This non-ideal transport was more pronounced for the medium with higher organic-carbon content. A mathematical model incorporating nonlinear, rate-limited sorption/desorption described by a continuous-distribution function was used to successfully simulate atrazine transport.

Original languageEnglish (US)
Pages (from-to)877-882
Number of pages6
JournalChemosphere
Volume77
Issue number6
DOIs
StatePublished - Oct 1 2009

Keywords

  • Continuous-distribution
  • Pesticide
  • Sorption kinetics
  • Transport modeling

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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