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Journal of Environmental Quality Abstract -

Effect of Sewage Sludge on the Adsorption of Polychlorinated Biphenyls by Three New Mexico Soils1


This article in JEQ

  1. Vol. 13 No. 2, p. 297-300
    Received: Mar 24, 1983

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  1. B. C. Fairbanks and
  2. G. A. O'Connor2



The adsorption of polychlorinated biphenyls (PCB's) (54% CI) by three low-organic matter New Mexico soils amended with sewage sludge was determined by batch equilibration. Adsorption isotherm data were described by the Freundlich equation. An increase in adsorption with increased organic C content was observed. However, for a given organic C content, adsorption in soils preconditioned with sewage sludge differed from soils amended with sludge at the time of adsorption analysis. Adsorption was greater in a clay soil than in two sandy loams. Differences in organic C content described 56.5% of the variance in the Freundlich K constants for PCB retention across all treatments. Incorporating the factor of clay content or specific surface area into the regression analysis accounted for 79.1% of the variance in K. Freundlich constants normalized for organic C content (Koc) were not constant across treatments.

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