Rate-limited sorption of hydrophobic organic compounds by soils with well-characterized organic matter

Joseph J. Piatt, Mark L Brusseau

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

This study is focused on the rate-limited sorption of homologous series of polycyclic aromatic hydrocarbons, alkylated benzenes, chlorinated benzenes, and chlorinated alkenes by two soils, one in which the organic matter is dominated by humic acid and the other by fulvic acid. The solutes sorbed more strongly to the humic-dominated soil than the fulvic-dominated soil. The first-order molecular connectivity index (1X(v)), a molecular solute descriptor, provided slightly better correlations with equilibrium sorption coefficients than did the octanol - water partition coefficient (K(ow)), an empirical solute descriptor. Thus, sorbate shape/structure may have a secondary influence on the overall magnitude of equilibrium sorption. However, sorbate shape/structure exhibited a significant influence on sorption kinetics. Distinct differences were observed in the correlations of mass-transfer coefficients to 1X(v) for the two soils. The differences were attributed to both sorbate shape/structure and the quantity (path length) and morphology of soil organic matter.

Original languageEnglish (US)
Pages (from-to)1604-1608
Number of pages5
JournalEnvironmental Science and Technology
Volume32
Issue number11
DOIs
StatePublished - Jun 1 1998

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Organic compounds
Biological materials
Sorption
organic compound
sorption
Soils
organic matter
solute
benzene
Benzene
soil
alkene
Humic Substances
fulvic acid
Octanols
partition coefficient
humic acid
Polycyclic Aromatic Hydrocarbons
soil organic matter
connectivity

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Rate-limited sorption of hydrophobic organic compounds by soils with well-characterized organic matter. / Piatt, Joseph J.; Brusseau, Mark L.

In: Environmental Science and Technology, Vol. 32, No. 11, 01.06.1998, p. 1604-1608.

Research output: Contribution to journalArticle

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