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RECORD NUMBER: 5 OF 9

Main Title Implications of the Calcium-Aluminum Exchange System for the Effect of Acid Precipitation on Soils.
Author Reuss, J. O. ;
CORP Author Colorado State Univ., Fort Collins. Dept. of Agronomy.;Corvallis Environmental Research Lab., OR.
Year Published 1983
Report Number EPA/600/J-83/317;
Stock Number PB86-100385
Additional Subjects Ion exchanging ; Soil analysis ; Calcium ; Aluminum ; Chemical equilibrium ; Environmental surveys ; Isotherms ; Leaching ; Sulfur dioxide ; Sulfuric acid ; Air pollution ; Ions ; Reprints ; Acid rain ; Numerical solution
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NTIS  PB86-100385 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
Abstract
Calcium-aluminum exchange isotherms were generated for three common ion exchange equilibrium equations, and their implications relative to the probable effects of acid rainfall are examined. The equations examined were those of Gaines and Thomas (1953), Vanselow (1932), and Gapon (1933), using selectivity coefficients K(sub g+), K(sub v), ud K(sub gp), respectively, covering the range likely to be found in soils. These isotherms, shown as fraction Al in solution as a function of the charge fraction compensated by exchangeable Ca-2(E*ca) or Ca+2(E*ca), are affected by solution concentration but are independent of cation exchange capacity. These results are useful in predicting the changes in Ca-Al balance in soil solutions and leachates over time as a result of H2So4 and/or SO2 impacts.