Acidification and recovery of a spodosol Bs horizon from acidic deposition
- Syracuse Univ., NY (USA)
A laboratory study was conducted to examine acidification and recovery of a Spodosol Bs horizon from acidic deposition in the Bear Brook Watershed (BBW) in central Maine. A mechanical vacuum extractor was used to draw solutions through a soil column at three treatments containing 40, 100, or 160 {mu}mol/L SO{sub 4}{sup 2{minus}}. Following 44 days of leaching, all treatments were decreased to the 40 {mu}mol/L SO{sub 4}{sup 2{minus}} level to examine recovery from acidification. Acid additions were initially neutralized by release of basic cations and sulfate adsorption. Following attainment of steady-state conditions for basic cations and SO{sub 4}{sup 2{minus}} with respect to the soil adsorption complex, Al dissolution was the primary neutralization mechanism. Aqueous Al activities appeared to be regulated by equilibrium with an Al(OH){sub 3} mineral phase. Following decreases in acid loadings, recovery was rapid resulting in retention of basic cations, reversible release of SO{sub 4}{sup 2{minus}}, and a marked reduction in the concentrations of soluble Al.
- OSTI ID:
- 5395841
- Journal Information:
- Environmental Science and Technology; (United States), Vol. 24:4; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Forest soil response to acid and salt additions of sulfate. II. Aluminum and base cations
Effect of soil processes on the acidification of water by acid deposition
Related Subjects
01 COAL, LIGNITE, AND PEAT
TERRESTRIAL ECOSYSTEMS
ACIDIFICATION
ACID RAIN
AIR POLLUTION
ALUMINIUM
AQUATIC ECOSYSTEMS
MAINE
SOILS
WATERSHEDS
ATMOSPHERIC PRECIPITATIONS
DEVELOPED COUNTRIES
ECOSYSTEMS
ELEMENTS
FEDERAL REGION I
METALS
NORTH AMERICA
POLLUTION
RAIN
USA
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)