Sorption of hydrophobic pollutants on natural sediments

https://doi.org/10.1016/0043-1354(79)90201-XGet rights and content

Abstract

The sorption of hydrophobic compounds (aromatic hydrocarbons and chlorinated hydrocarbons) spanning a concentration range in water solubility from 500 parts per trillion (ppt) to 1800 parts per million (ppm) on local (North Georgia) pond and river sediments was investigated. The sorption isotherms were linear over a broad range of aqueous phase pollutant concentrations. The linear partition coefficients (Kp) were relatively independent of sediment concentrations and ionic strength in the suspensions. The Kp ś were directly related to organic carbon content for given particle size isolates in the different sediments. On an organic carbon basis (Koc = Kp/fraction) organic carbon), the sand fraction (> 50 μm particle size) was a considerably less effective sorbent (50–90% reduction in Koc) than the fines fraction (> 50 μm particles). Differences in sorption within the silt and clay fractions were largely related to differences in organic carbon content. Reasonable estimates of Kocś can be made from octanol/water distribution coefficients, which are widely catalogued or easily measured in the laboratory.

References (18)

  • L.S. Bark et al.

    Studies in the relationship between molecular structure and chromatographic behavior

    J. Chromatography

    (1966)
  • G.W. Bailey et al.

    Factors influencing the adsorption, desorption and movement of pesticides in soil

    Residue Rev.

    (1970)
  • G.G. Briggs

    A simple relationship between soil sorption of organic chemicals and their octanol/water partition coefficients

  • G.G. Briggs

    Molecular structure of herbicides and their sorption by soils

    Nature

    (1969)
  • C.T. Chiou et al.

    Partition coefficient and bioaccumulation of selected organic chemicals

    Environ. Sci. Technol.

    (1977)
  • J.W. Hamaker

    The interpretation of soil leaching experiments

  • R.J. Hance

    An empirical relationship between chemical structure and the sorption of some herbicides by soil

    J. agric. Fd Chem.

    (1969)
  • M.L. Jackson

    Soil Chemical Analysis - Advanced Course

    (1956)
  • S.M. Lambert

    Omega (Ω) a useful index of soil sorption equilibria

    J. agric. Fd Chem.

    (1968)
There are more references available in the full text version of this article.

Cited by (0)

View full text