ILLITE' A MODEL BASED ON THE SORPTION BEHAVIOR OF CESIUM

INVESTIGATIONS OF THE CESIUM SORPTION CAPACITIES OF A NUMBER OF NATURAL ILLITE AND ILLITE-MIXED-LAYER ASSEMBLAGES HAVE SHOWN THAT THE CESIUM FIXATION IS FUNDAMENTALLY ONE OF SURFACE AND/OR EDGE SORPTION. MONITORING OF THE CLAY MINERAL STRUCTURES BY X-RAY DIFFRACTION AND ONE-DIMENSIONAL STRUCTURAL ANALYSES HAVE SHOWN THAT NO STRUCTURAL EXCHANGE HAS OCCURRED WHICH CAN BE ASCERTAINED BY THESE TECHNIQUES, ALTHOUGH APPROXIMATELY 90% OF THE CS PRESENT IN THE CONTACTING SOLUTION HAS BEEN SORBED. A MODEL FOR ILITE BASED UPON A CORE-RIND CONCEPT GIVES AN APPARENT BEST FIT TO THE EXPERIMENTAL DATA. THIS MODEL PROPOSES A STRUCTURALLY COHERENT SILICATE CORE FOR THE CLAY PLATELET, SURROUNDED BY A MORE INCOHERENT SILICATE RIND AREA WITH A SKELETAL FRAMEWORK REMINISCENT OF THE MORE COHERENT PORTION. THE PHYSICAL AND CHEMICAL CHARACTERISTICS OF ILLITE ARE COMPATIBLE WITH THIS PROPOSED MODEL, AS WELL AS THE GENERAL MORPHOLOGICAL CHARACTER OF THE 10 ANGSTROM MATERIALS. THE SORPTION BEHAVIOR OF CS IS CONSIDERED THEN TO BE PRIMARILY DUE TO THE COMPETITION CS WITH OTHER IONS IN RESPECT TO POTASSIUM OR POTASSIUM-DEPLETED SITES OF THE SKELETAL INCOHERENT RIND PORTION OF THE ILLITE. /AUTHOR/

  • Supplemental Notes:
    • Vol 51, No 11 & 12, PP 1649-1656, 2 FIG, 1 TAB, 4 REF
  • Corporate Authors:

    N/A

    ,   United States 
  • Authors:
    • Gaudette, H E
    • Grim, R E
    • Metzger, C F
  • Publication Date: 0

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  • Accession Number: 00228838
  • Record Type: Publication
  • Report/Paper Numbers: no 5-6
  • Files: TRIS
  • Created Date: Aug 15 2004 2:37AM