Science Inventory

INFLUENCE OF SOLVENT AND SORBENT CHARACTERISTICS ON DISTRIBUTION OF PENTACHLOROPHENOL IN OCTANOL-WATER AND SOIL-WATER SYSTEMS

Citation:

Lee, L. S., P. Suresh, C. Rao, P. NkediKizza, AND J. J. Delfino. INFLUENCE OF SOLVENT AND SORBENT CHARACTERISTICS ON DISTRIBUTION OF PENTACHLOROPHENOL IN OCTANOL-WATER AND SOIL-WATER SYSTEMS. ENVIRONMENTAL SCIENCE & TECHNOLOGY 24(5):654-661, (1990).

Impact/Purpose:

Information.

Description:

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) and the formation and sorption of neutral ion pairs [e.g., metal cation (M') + (PCP-) = MPCPO] was considered. The observed sorption data were described over the entire pH range with knowledge of pH, soil organic carbon content, and PCP's pK,. Increased sorption of PCP- was observed with in- creasing ionic strength for batch sorption studies con- ducted in aqueous CaClz solutions. Octanol-water par- tition coefficients measured in various electrolyte solutions suggested that formation of MPCPO and the partitioning of PCP- are influenced by the cationic species. Batch sorption studies conducted in methanol-water solutions suggest the predominance of solute-solvent interactions in the sorption of both the neutral and ionized forms of PCP; sorption decreased in a log-linear manner with in- creasing methanol fractions.

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Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 05/01/1990
Record Last Revised: 03/20/2009
OMB Category: Other
Record ID: 128776

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUBSURFACE PROTECTION AND REMEDIATION DIVISION

SUBSURFACE REMEDIATION BRANCH