Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Soluble Aluminum in Acidified Organic Horizons of Forest Soils.
Author James, B. R. ; Riha, S. J. ;
CORP Author Cornell Univ., Ithaca, NY. Dept. of Agronomy.;Corvallis Environmental Research Lab., OR.
Year Published 1984
Report Number EPA/600/J-84/336;
Stock Number PB86-103124
Additional Subjects Aluminum ; Soil horizons ; Acidification ; Forest land ; Water pollution ; Nitric acid ; pH ; Concentration(Composition) ; Organic acids ; Carbon ; Ligands ; Temperature ; Silicon chemical equilibrium ; Air pollution ; Reprints ; Acid precipitation
Library Call Number Additional Info Location Last
NTIS  PB86-103124 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 11p
Concentrations of labile and total Al in soil extracts were measured as a function of equilibrium solution pH in six forest soil organic horizons acidified with HNO, (0-20 cmol under controlled conditions of ionic strength (0.05 M NaNO3), temperature (23 C), and solution:soil ratio (25:1). Decreases of 0.1-0.2 in solution pH in the range of pH 2.4-4.5 resulted in increases and decreases in concentrations of labile and total Al. Organic acids and soluble C were the dominant Al-complexing ligands in solution,and acidification of each horizon decreased their concentration. Silicon and F concentrations in the equilibrium solutions were lower than that of C, but levels were similar to those of nonlabile Al. Nonlabile complexes were the dominant forms of soluble Al in horizons above pH 4, and labile Al comprised an increasing percentage of total Al as pH decreased, especially below pH 3.