Lead, cadmium, and calcium selectivity coefficients on a montmorillonite, illite, and kaolinite

Journal Article · Tue Jan 01 04:00:00 EST 1974 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1974.00472425000300030013x· OSTI ID:6302304

Bittell, J E; Miller, R J

Selectivity coefficients for Pb/sup 2 +/, Cd/sup 2 +/, and Ca/sup 2 +/ exchange adsorption with montmorillonite, illite, and kaolinite clays were determined over a wide range of clay surface concentration and found constant. The average selectivity coefficients describing the ion distributions for montmorillonite, illite, and kaolinite, respectively, were 0.60, 0.44, 0.34 for Pb-Ca exchange, 1.04, 1.01, 0.89 for Cd-Ca exchange, and 0.58, 0.56, 0.31 for Pb-Cd exchange. Whereas Cd/sup 2 +/ may compete more or less on an even basis with Ca/sup 2 +/ for clay adsorption sites, the adsorption of Pb/sup 2 +/ would be favored by a factor of 2 or 3 over Ca/sup 2 +/. 21 references.

• Research Organization: Univ. of Illinois, Urbana
• OSTI ID: 6302304
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 3:3; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH METALS
AVAILABILITY
CADMIUM
CALCIUM
CLAYS
DATA
ELEMENTS
EXPERIMENTAL DATA
ILLITE
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KAOLIN
LEAD
MATERIALS
METALS
MONTMORILLONITE
NUMERICAL DATA
SOILS