Kaolins: sources of differences in cation-exchange capacities and cesium retention

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Ann. Bot. (London); (United States)

OSTI ID:6840181

H, Lim C; Jackson, M L; Koons, R D; Helmke, P A

Seven kaolins from Georgia (southeastern USA), ranging from high to low commercial grade, were characterized by x-ray powder diffraction and chemical techniques to establish that the variation in quality was caused by impurities. The Ca and Cs cation-exchange capacities (CEC) varied from 2.67 to 8.17 and from 3.29 to 8.77 meq/100 g, respectively. The external surface CEC of kaolinite ranged from 0 to 1 meq/100 g. The Cs-retention capacity (0.19 to 1.14 meq/100 g) was closely related to Cs-measured vermiculite content and this content plus specific surface mica content. The Cs retention appeared to be primarily related to the presence of interlayer wedges at mica/vermiculite XY interfaces.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 6840181
• Journal Information: Ann. Bot. (London); (United States), Vol. 28:3
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
IMPURITIES
EVALUATION
KAOLIN
ION EXCHANGE
X-RAY DIFFRACTION
CALCIUM
CATIONS
CESIUM
GEORGIA
MICA
SMECTITE
VERMICULITE
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CHARGED PARTICLES
CLAYS
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IONS
IRON COMPOUNDS
IRON SILICATES
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
MATERIALS
METALS
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
SCATTERING
SILICATES
SILICON COMPOUNDS
SOUTHEAST REGION
TRANSITION ELEMENT COMPOUNDS
USA
510100* - Environment
Terrestrial- Basic Studies- (-1989)