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OLS Field Name OLS Field Data
Main Title Estimation Methods for Process Constants and Properties Used in Fate Assessments.
Author Mabey, W. R. ; Mill, T. ; Podoll, R. T. ;
CORP Author SRI International, Menlo Park, CA.;Environmental Research Lab., Athens, GA.
Year Published 1984
Report Number EPA-68-03-2981; EPA-600/3-84-035;
Stock Number PB84-159268
Additional Subjects Physical properties ; Reaction kinetics ; Chemical equilibrium ; Chemical compounds ; Environmental surveys ; Molecular structure ; Assessments ; Air pollution ; Water pollution ; Sediments ; Soils ; Path of pollutants ; Structure activity relationships ; Property reactivity correlations ; Numerical solution
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB84-159268 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 149p
Abstract
Physical property data, rate constants, and equilibrium constants are required for assessments of the fate of chemicals in the environment. Structure-activity relationship (SARs), property correlations, and reactivity correlations arex sources of such data that are increasingly recognized as rapid, practical, and inexpensive methods with which to estimate values of some constants or properties. Although it is unlikely that major environmental decisions will be made based solely on such information, these estimates are often useful within the context of deciding whether better data are required for an assessment, whether a process may be important for a particular chemical, or as a check on a reported value. In some cases, estimated data are useful in concluding that a chemical will or will not persist in a specific environmental situation by simple analogy to experience with other chemicals having similar properties or reactivities. This report reviews a broad range of qualitative and quantitative relationships between structure and properties or reactivities as well as correlations among different properties and reactivities. Also included are the specific theoretical and enpirical equations used in fate assessments that use data produced by these estimation methods. The limitations of these estimation methods are discussed as are testing procedures.