Compound dependence of the relationship log Kow and log BCFL |
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Authors: | Johan Axelman Dag Broman Carina Näf Harald Pettersen |
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Institution: | 1. Aquatic Chemical Ecotoxicology, Department of Zoology, Stockholm University, S-106 91, Stockholm, Sweden 2. Institute of Applied Environmental Research, Stockholm University, S-10691, Stockholm, Sweden 3. Department of Analytical Chemistry, Stockholm University, S-106 91, Stockholm, Sweden
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Abstract: | Linear relatinships between log bioconcentration factor (BCF) and log Kow for a variety of compounds have been reported many times in the literature. Analysis of the thermodynamics of the two partition
processes has, however, shown that they are not analogous and that linear relationships can be expected to have different
slopes for structurally unrelated compounds. In this study a set of literature lipid normalized BCF (BCFL) values of chlorbenzenes (CBs) for rainbow trout and polycyclic aromatic hydrocarbons (PAHs) forDaphnia was put together with literature Kow values. The slopes of the regression lines for log BCFL versus log Kow for the two groups of compounds proved to differ significantly in a statistical test using analysis of variance (ANOVA).
The difference, which is of significance for estimates of BCFs in environmental modelling of these types of compounds, is
explained by the differences in chemical structure of the two groups of compounds. |
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Keywords: | Partition processes log Kow log BCFL bioconcentration factor chlorobenzenes CBs polycyclic aromatic hydrocarbons PAHs rainbow trout Daphnia statistical test: ANOVA analysis of variance |
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