Record Display for the EPA National Library Catalog

RECORD NUMBER: 42 OF 60

OLS Field Name OLS Field Data
Main Title Organic Acidity in Maine (U.S.A.) Lakes and in HUMEX Lake Skjervatjern (Norway).
Author David, M. B. ; Vance, G. F. ; Kortelainen, P. ;
CORP Author Illinois Univ. at Urbana-Champaign. ;Wyoming Univ., Laramie. ;National Board of Waters and the Environment, Helsinki (Finland).;Corvallis Environmental Research Lab., OR.
Publisher c1991
Year Published 1991
Report Number EPA/600/A-92/291;
Stock Number PB93-141166
Additional Subjects Acidification ; Lakes ; Water pollution ; Organic acids ; Water chemistry ; United States ; Maine ; Norway ; Surface waters ; Humus ; Soil chemistry ; Ecosystems ; Anions ; Reprints ; Dissolved organic carbon
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-141166 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/12/1993
Collation 9p
Abstract
Organic acids, a component of dissolved organic carbon (DOC), can be a major factor in the acidity of many lakes and streams. In order to evaluate the importance of organic acidity, we fractionated (hydrophobic acids and neutrals, hydrophilic acids, bases, and neutrals) and isolated hydrophobic and hydrophilic acids from several Maine seepage and drainage lakes, and from each half of Lake Skjervatjern. For all lakes where DOC was isolated, hydrophilic acids consistently had greater exchange acidities compared to hydrophobic acids. Overall, lake DOC charge relationships and fractions were similar to forest floor DOC leachate chemistry that was also examined in detail at a site in Maine. This suggests that the nature of DOC in the temperate to boreal ecosystems studied (e.g., high carboxylic functional group content) is rather similar regardless of source (e.g., upland soil leachates, wetlands, or Sphagnum deposits).