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RECORD NUMBER: 119 OF 290

OLS Field Name OLS Field Data
Main Title Generation of Soil Solution Acid-Neutralizing Capacity by Addition of Dissolved Inorganic Carbon.
Author David, M. B. ; Vance, G. F. ;
CORP Author Illinois Univ. at Urbana-Champaign. Dept. of Forestry.;Corvallis Environmental Research Lab., OR.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/304;
Stock Number PB90-198672
Additional Subjects Soil chemistry ; Chemical equilibrium ; Carbon ; Tables(Data) ; pH ; Carbon dioxide ; Reprints ; Acid neutralizing capacity
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB90-198672 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/27/1990
Collation 6p
Abstract
A Spodosol B horizon (base saturation of 5.4%) collected at the Watershed Manipulation Project site at Lead Mountain, ME, was used to examine soil solution chemistry in response to increasing solution levels of dissolved inorganic carbon (DIC). Acid-neutralizing capacity (ANC), determined by Gran titration, increased from -5 to 163 mw equiv/L in response to increasing DIC, with a corresponding increase in base cations (Ca2+, Mg2+, K+, and Na+). For the negative ANC solutions, degassing increased solution pH (in equilibrium with atmospheric CO2) slightly from 4.94 to 5.14, whereas solutions with positive ANC showed large pH shifts (e.g., ANC of 69, pH shift from 4.73 to 6.81). Under equilibrium assumptions and log K(sub A1) determined from 2.66pH-pAl, measured values from ANC, sum of cations, pH, and degassed pH were found to be in agreement with predictions from a chemical equilibrium model. (Copyright (c) 1989 American Chemical Society.)