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1 results

  • Cation-Exchange Behavior of Clays and Synthetic Aluminosilica Gels

  • C. H. Chu, L. J. Johnson
  • Journal:
    Clays and Clay Minerals / Volume 27 / Issue 2 / April 1979
    Published online by Cambridge University Press:
    01 July 2024, pp. 87-90
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  • Cation-exchange capacities determined by methylene blue adsorption (CEC MB) and by the amount of K displaced from a K-saturated clay by NH4 (CEC K//NH4) correlate closely in five soil clays from Pennsylvania, but differ greatly in two soil clays with a large content of amorphous material. CEC MB was found to provide a more precise distinction between montmorillonite and vermiculite than CEC K//NH4. Synthetic aluminosilicate gels showed CEC K//NH4 > CEC Ca/Mg > CEC MB, but no relation to the behavior of the two soil clays with a large content of amorphous material was found.