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This article in SSSAJ

  1. Vol. 35 No. 2, p. 256-259
    Received: Sept 3, 1970
    Accepted: Dec 8, 1970

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s-Triazine Adsorption Studies: Ca-H-Humic Acid1

  1. J. T. Gilmour and
  2. N. T. Coleman2



Small amounts of Ca-H-humic acid suspension in dialysis bags were immersed in dilute CaCl2 which contained 1.33 × 10-5M to 6.67 × 10-5M atratone, atrazine, prometone, or prometryne. Adsorption isotherms were linear. Increases in CaCl2 concentration from 10-4M to 10-2M or larger Ca saturation (10 to 100% Ca) of humic acid resulted in less s-triazine adsorption. Greater adsorption occurred when the amount of Ca-humate at a specified Ca saturation was increased. An ionexchange treatment of adsorption quantitatively predicted adsorption changes with change in s-triazine concentration, CaCl2 concentration, and Ca saturation of the humic acids.

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