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RECORD NUMBER: 532 OF 1214

OLS Field Name OLS Field Data
Main Title Forest Soil Response to Acid and Salt Additions of Sulfate. 1. Sulfur Constituents and Net Retention.
Author David, M. B. ; Fasth, W. J. ; Vance, G. F. ;
CORP Author Illinois Univ. at Urbana-Champaign. Dept. of Forestry.;Corvallis Environmental Research Lab., OR.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-91/229;
Stock Number PB92-108182
Additional Subjects Forest land ; Soil analysis ; Acidification ; Sulfates ; Salts ; Land pollution ; Adsorption ; Environmental effects ; Mineralization ; Desorption ; Immobilization ; Experimental design ; pH ; Environmental transport ; Water pollution ; Ecosystems ; Soil chemistry ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB92-108182 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 02/24/1992
Collation 12p
Abstract
The authors used soil columns constructed from a Maine Spodosol and Illinois Alfisol to investigate the retention of SO4(2-) added as Na2SO4 or H2SO4. Both organic and inorganic S pools were examined to determine how retention of added SO4(2-) was influenced by both mineralization/immobilization and adsorption/desorption processes. Forty columns were leached weekly for a year with simulated throughfall solutions containing base cations (Ca(2+), Mg(2+), K(+), Na(+), NH4(+), NO3(-), Cl(-), and either 80, 280, or 1080 microeq SO4(2-)/L for varying periods. At the conclusion of the experiment acid and control columns were destructively sampled by depth increments to examine organic (C-bonded S and ester sulfate) and extractable SO4(2-) concentrations, as well as soil pH. For all Spodosol columns, SO4(2-) adsorption by the B horizon was the dominant process of SO4(2-) retention; no changes in organic S pools were observed. Soils in acid columns retained greater SO4(2-) than salt columns, most likely due to pH dependent adsorption. However, all Spodosols retained large amounts of SO4(2-). In the Alfisol SO4(2-) retention was lower than in the Spodosols (<25%) due to a limited SO4(2-) adsorption capacity; mineralization of C- bonded S resulted in S inputs nearly equaling outputs. Although organic S was the dominant S pool in both soils, there was little mineralization overall, and inorganic adsorption appeared to be the primary process of SO4(2-) retention. (Copyright (c) 1991 by Williams & Wilkins.)