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RECORD NUMBER: 50 OF 89

OLS Field Name OLS Field Data
Main Title Influence of Solvent and Sorbent Characteristics on Distribution of Pentachlorophenol in Octanol-Water and Soil-Water Systems.
Author Lee, L. S. ; Rao, P. S. C. ; Nkedi-Kizza, P. ; Delfino., J. J. ;
CORP Author Florida Univ., Gainesville.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1990
Year Published 1990
Report Number EPA-R-814512; EPA/600/J-90/200;
Stock Number PB91-116186
Additional Subjects Sorption ; Solubility ; Isotherms ; Soils ; Acidity ; Water ; Reprints ; Pentachlorophenol ; Partition coefficients ; Octane ; Binary mixtures
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB91-116186 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/04/1991
Collation 10p
Abstract
Sorbent and solvent characteristics influencing sorption of pentachlorophenol (PCP) were investigated. Analysis of aqueous sorption data for several sorbents over a broad pH range suggested hydrophobic sorption of neutral PCP predominates at pH<7. At pH>7, sorption of the pentachlorophenolate anion PCP(-1) and the formation and sorption of neutral ion pairs (such as metal cation (M(+) + PCP(-1) = MPCP(o)) were considered. The observed sorption data were described over the entire pH range with knowledge of pH, soil organic carbon content, and PCP's pKa. Increased sorption of PCP(-1) was observed with increasing ionic strength for batch sorption studies conducted in aqueous CaCl2 solutions. Octanol-water partition coefficients measured in various electrolyte solutions suggested that formation of MPCP(o) and the partitioning of PCP(-1) are influenced by the cationic species. (Copyright (c) by the American Chemical Society, 1990.)