Relationships among iron, aluminum, carbon, and sulfate in a variety of forest soils

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Soil Sci.; (United States)

OSTI ID:5043739

Johnson, D W; Todd, D E

Among several soil properties tested, percent Fe/sub c/ (i.e., Fe by citrate-dithionite minus oxalate extraction) was the single parameter most closely related to SO/sub 4//sup 2 -/ adsorption properties in a variety of forest soils. There were exceptions to this general relationship, however, and a combination of percent C, citrate-dithionite, and oxalate extractions for both Fe and Al appear most promising in predicting sulfate adsorption. Percent clay, pH, and pyrophosphate-extractable Fe + Al were either insignificantly or inconsistently related to SO/sub 4//sup 2 -/ adsorption. Because organic matter had a decidedly negative influence upon SO/sub 4//sup 2 -/ adsorption, surface soils and B horizons of Spodosols (and highly podzolized soils) had relatively poor SO/sub 4//sup 2 -/ adsorption properties, even when their dithionite-extractable Fe values were high. Organic matter also reduced Fe crystallinity (i.e., increased Fe/sub c//Fe/sub d/, or the ratio of oxalate to dithionite Fe), and the results of this study suggest that crystalline rather than amorphous, inorganic Fe (i.e., oxalate minus pyrophosphate Fe) is most highly correlated with adsorbed, water-insoluble SO/sub 4//sup 2 -/.

• Research Organization: Oak Ridge National Lab., TN
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5043739
• Journal Information: Soil Sci.; (United States), Journal Name: Soil Sci.; (United States) Vol. 47:4; ISSN SOSCA
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
580400 -- Geochemistry-- (-1989)
ALUMINIUM
CARBON
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISORPTION
CHEMISTRY
CLASSIFICATION
DISSOLUTION
ELEMENTS
FORESTS
ION EXCHANGE
IONS
IRON
LEACHING
METALS
NONMETALS
ORGANIC MATTER
OXYGEN COMPOUNDS
PH VALUE
SEPARATION PROCESSES
SOIL CHEMISTRY
SOILS
SOLUBILITY
SORPTION
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENTS