Exchange of lyotropic series cations by micaceous vermiculite and its weathering products determined by electron microscopy and radiochemical analysis. Final technical report, June 1, 1965-October 31, 1978

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Micaceous vermiculite was found to be ubiquitous in soils, sediments, and aerosol mineral dusts and to adsorb fission product ions, particularly /sup 137/Cs/sup +/ and /sup 90/Sr/sup 2 +/. Crystallographic wedge zones (imaged by ultramicrotomy and electron microscopy) in micaceous vermiculite effected tight fixation of Cs/sup +/. Lowering of mica layer charge occurred in local areas, electronoscopically imaged by use of blister-swelling cations. Nuclear fission particle tracks of U enhanced translayer diffusion of elements, measured mica layer charge and age. Iron-aluminum hydrous oxide coatings adsorbed divalent cations of the alkaline earth, transition, and heavy metal elements from trace concentrations in ... continued below

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Pages: 30

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Jackson, M L January 1, 1978.

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Micaceous vermiculite was found to be ubiquitous in soils, sediments, and aerosol mineral dusts and to adsorb fission product ions, particularly /sup 137/Cs/sup +/ and /sup 90/Sr/sup 2 +/. Crystallographic wedge zones (imaged by ultramicrotomy and electron microscopy) in micaceous vermiculite effected tight fixation of Cs/sup +/. Lowering of mica layer charge occurred in local areas, electronoscopically imaged by use of blister-swelling cations. Nuclear fission particle tracks of U enhanced translayer diffusion of elements, measured mica layer charge and age. Iron-aluminum hydrous oxide coatings adsorbed divalent cations of the alkaline earth, transition, and heavy metal elements from trace concentrations in the presence of 1 M NaNO/sub 3/. Global deposition of dust by rainfall accounted for the wide distribution of Cs-fixing micaceous vermiculite in soils. Origin of the dust was traced through a method developed for isolation of fine quartz silt (1 to 10 ..mu..m diameter). Mass spectrometry of its /sup 18/O//sup 16/O isotopic ratios showed distinctly higher (delta/sup 18/O = 17 to 22%/sub 0/) and lower (delta/sup 18/O = 9 to 15%/sub 0/) ranges in the Northern and Southern Hemispheres, respectively. This difference was traced to the relative proportions of quartz from low-temperature authigenic (chert) vs igneous-metamorphic origin in the respective latitudes, hinging on trans-equatorial continental drift.

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Pages: 30

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NTIS, PC A03/MF A01.

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  • Report No.: DOE/EV/01515-84
  • Grant Number: AS02-76EV01515
  • DOI: 10.2172/5073278 | External Link
  • Office of Scientific & Technical Information Report Number: 5073278
  • Archival Resource Key: ark:/67531/metadc1055771

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  • January 1, 1978

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 25, 2018, 12:48 p.m.

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Jackson, M L. Exchange of lyotropic series cations by micaceous vermiculite and its weathering products determined by electron microscopy and radiochemical analysis. Final technical report, June 1, 1965-October 31, 1978, report, January 1, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1055771/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.