Transformations of aluminum in waters draining podzolic forest soils

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5163813

Browne, B A

In this study, I undertook a combined laboratory and field investigation of the chemistry and transformations of soluble aluminum-ligand complexes prevalent in podzolic soils. Three biogeochemically important ligands (silicate, phosphate, and fulvate) were tested in laboratory studies. Silicate and phosphate formed a series of soluble mono- and di-nuclear aluminum complexes exhibiting pH dependent conditional stabilities consistent with mixed hydroxy-Al-ligand species. Equilibrium constants were estimated for a soluble mononuclear aluminum-silicate (AlH{sub 3}SiO{sub 4}{sup 2+}) and a series of hydroxy-aluminum-phosphate complexes. Binding between Al and fulvate was consistent with 1:1:0, 1:1:1 and 1:1:2 Al:fulvate:OH combining ratios, and a pH dependent form of a two-site Scatchard model was developed to model the experimental data. Field studies were conducted in three watersheds overlain by podzolic soils: Hubbard Brook Experimental Forest, New Hampshire; the North Branch of Moose River, New York State: and Jamieson Creek Watershed, British Columbia. Aluminum-organic complexes dominated the chemistry of soluble aluminum in each study watershed. A simple, accurate predictive model of aluminum speciation was developed based on pH titration data of surface water samples.

• Research Organization: Syracuse Univ., NY (USA)
• OSTI ID: 5163813
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ALUMINIUM
WATER CHEMISTRY
FULVIC ACIDS
BIOGEOCHEMISTRY
PHOSPHATES
SILICATES
WATERSHEDS
ACIDIFICATION
ACID RAIN
BRITISH COLUMBIA
COMPLEXES
FORESTS
MATHEMATICAL MODELS
NEW HAMPSHIRE
NEW YORK
PH VALUE
SOILS
SOLUBILITY
WATER POLLUTION
ATMOSPHERIC PRECIPITATIONS
CANADA
CHEMISTRY
ELEMENTS
FEDERAL REGION I
FEDERAL REGION II
GEOCHEMISTRY
METALS
NORTH AMERICA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
POLLUTION
RAIN
SILICON COMPOUNDS
USA
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)