Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Sorption of Organic Acid Compounds to Sediments: Initial Model Development.
Author Jafvert, C. T. ;
CORP Author Environmental Research Lab., Athens, GA. Office of Research and Development.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/172;
Stock Number PB91-144980
Additional Subjects Organic acids ; Sediments ; Sorption ; Chemical water pollutants ; pH ; Chemical properties ; Reprints ; Dinitro-o-cresols ; Trichlorophenoxy propanoic acid ; Pentachlorophenol ; Chloro-alpha-chlorophenyl benzeneacetic acid ; Dichlorophenoxybutyric acid ; DDA insecticide ; Silvex ; PCP herbicide ; DNOC herbicide
Library Call Number Additional Info Location Last
NTIS  PB91-144980 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/13/1991
Collation 12p
The adsorption to sediments and soils of selected organic acid compounds was examined as a function of compound and sediment properties. Intrinsic compound properties examined included the dissociation constant (pKa) and hydrophobic character. Properties of the sediment examined included ionic strength and composition, organic carbon content and aqueous phase pH. By varying these properties, adsorption of both the neutral and anionic forms of these compounds was shown to occur. Adsorption of the neutral species occurs similarly to that of other hydrophobic compounds that do not contain acidic functional groups. Adsorption of the anionic species was influenced, however, by intrinsic chemical as well as electostatic factors. Adsorption of the anionic species to a specific sediment was modeled as a linearly dependent function of pH. Compounds used in this study included 2,4-dinitro-o-cresol (DNOC), 2-(2,4,5-trichlorophenoxy)propanoic acid (silvex), pentachlorophenol (PCP), 4-chloro-alpha-(4-chlorophenyl)benzeneacetic acid (DDA) and 4-(2,4-dichlorophenoxy-butyric acid (2,4-DB).