Koo Estimation Using Kow The property used most often in estimation models for Koc is Kow. Correlations between Koc and Kow are represented by the following equation [Pg.173]

Estimate Koc from the octanol-water partition constant, Kow, using the linear free energy relationship (Eq. 9-26f), with log Kov/ = 2.88 (Appendix C) [Pg.1176]

Example 3a) Estimate Koc and Kd for lindane in a soil containing 4% organic carbon using the log Kow value of 3.721isted in Table 8.7. [Pg.196]

Probably the most widely used and accepted approach for estimating Koc is based on correlations with physical/chemical properties such as Kow or S. The literature presents many such relationships and Tables 8.1 and 8.2 list several representative examples. Also see several previous compilations of Koc-property correlations by Lyman et al. (1982) and Gawlik et al. (1997). [Pg.173]

Example 5c) Assuming no experimental values of Kow or S are available, estimate Koc for trichloroethylene from MCIs, using the following expression (Meylan et al. 1992) [Pg.200]

In addition to the Koc-Solubility relations already mentioned, we estimated Koc from the Koc-Kow relation developed by Karickhoff et. al.. Log Koc = 1.00 log Kow - 0.21 (15). Our estimate and earlier reported values using this relation are compared in Table IX. [Pg.112]

Experimentally determined retention times or capacity factors (k) generated by reverse phase, usually octadecylsilane (ODS), high performance liquid chromatography (RP-HPLC) have been used widely to estimate Kow values (McDuffie, 1981 Haky and Young, 1984 Sarna, 1984 Doucette and Andren, 1988). More recently, this approach has been used to directly estimate Koc (Vowles and Mantoura, 1987 Hodson and Williams, 1988 Szabo et al., 1990 Kordel et al., 1993 Kordel et al., 1995 Hong et al., 1996). This is not strictly an estimation method because it relies on the acquisition of experimental retention times. [Pg.180]

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