Boron adsorption on aluminum and iron oxide minerals

Conference · · Soil Sci. Soc. Am. J.; (United States)

OSTI ID:6337672

Goldberg, S; Glaubig, R A

Boron adsorption behavior was investigated on various crystalline and x-ray amorphous Al and Fe oxide minerals. Adsorption increased at low pH, exhibited a peak in the pH range 7 to 8, and decreased at high pH. The magnitude of B adsorption was much greater for the x-ray amorphous materials. Since B adsorbs specifically on Al and Fe oxide minerals, the constant capacitance model containing a ligand exchange mechanism was used to describe its adsorption behavior. The constant capacitance model was able to represent B adsorption on all minerals over the entire pH range studied (3-12) using the same set of surface complexation constants. With the exception of amorphous Al oxide, B adsorption on these oxide minerals could be successfully described by optimizing only the B surface complexation constant. Other nonexperimental parameters were held fixed at values identical to those previously used in modeling phosphate, silicate, and selenite adsorption on Al and Fe oxide minerals.

• Research Organization: Dept. of Agriculture, Riverside, CA
• OSTI ID: 6337672
• Conference Information: Journal Name: Soil Sci. Soc. Am. J.; (United States) Journal Volume: 49:6
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BORON
CHALCOGENIDES
CHEMISTRY
ELEMENTS
IRON COMPOUNDS
IRON OXIDES
LIGANDS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
SEMIMETALS
SOIL CHEMISTRY
SORPTION
TRANSITION ELEMENT COMPOUNDS