Record Display for the EPA National Library Catalog


Main Title Influence of Aqueous Aluminum and Organic Acids on Measurement of Acid Neutralizing Capacity in Surface Waters.
Author Sullivan, T. J. ; Driscoll, C. T. ; Gherini, S. A. ; Munson, R. K. ; Cook, R. B. ;
CORP Author Syracuse Univ., NY. Dept. of Civil Engineering. ;Tetra Tech, Inc., Lafayette, CA. ;Oak Ridge National Lab., TN. ;Indiana Univ. at Bloomington. Dept. of Biology.;Corvallis Environmental Research Lab., OR.
Publisher c1989
Year Published 1989
Report Number EPA-R-814951 ;EPA-R-813933;
Stock Number PB90-108465
Additional Subjects Surface waters ; Acidification ; Neutralizing ; Aluminum ; Dissolved organic matter ; Carbon ; Chemical analysis ; Quantitative analysis ; Valence ; Volumetric analysis ; Graphs(Charts) ; Reprints ; Acid neutralizing capacity
Library Call Number Additional Info Location Last
NTIS  PB90-108465 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 5p
Acid neutralizing capacity (ANC) is used to quantify the acid-base status of surface waters. Acidic waters have been defined as having ANC values less than zero, and acidification is often quantified by decreases in ANC. Measured and calculated values of ANC generally agree, except for low-ANC waters. The discrepancy in ANC is greatest for waters with high concentrations of aluminum and/or dissolved organic carbon (DOC). The discrepancy due to aluminum increases with increasing concentration of dissolved monomeric aluminum (Al sub m) and can exceed 50 micro eq/1 at low pH and high Al sub m values. ANC should not be used as a single parameter for characterizing the chemical suitability of surface waters for biota or for assessing the susceptibility of low-ANC waters to acidification by acid deposition. (Copyright (c) Macmillan Magazine, Ltd. 1989.)