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This article in SSSAJ

  1. Vol. 35 No. 4, p. 546-550
    Received: Nov 19, 1970
    Accepted: Jan 20, 1971

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Boron Adsorption Characteristics of Selected Amorphous Soils From Mexico and Hawaii1

  1. F. T. Bingham,
  2. A. L. Page,
  3. N. T. Coleman and
  4. K. Flach2



Boron adsorption by Mexican and Hawaiian soils derived from volcanic ash deposits as influenced by solution phase concentration, reaction time, suspension pH, temperature, percent amorphous Al2O3 and SiO2, and free Fe2O3 content was studied. The adsorption was satisfactorily described by the Langmuir adsorption equation. Adsorption maxima were considerably greater than those observed for soils derived from other kinds of parent materials. In the range from 10 to 40C increases in temperature affected boron adsorption slightly. Maximum adsorption occurred between pH 8 and 9, suggesting that these soils have a greater affinity for B(OH)-4-B than for B(OH)3-B. Boron adsorption by both the Mexican and Hawaiian soils was significantly correlated with amorphous SiO2 plus Al2O3 and amorphous Al2O3. However, higher correlation coefficients were obtained between boron adsorption and percent amorphous Al2O3. No significant correlations were found between boron adsorption and amorphous SiO2, and free F2O3 content.

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