Adsorption coefficients (Koc) on soil and sediment are often estimated on the unionised form of ionisable substances. However, under environmental conditions (pH 6-9), carboxylic acids are under their anionic form because their pKa is around 5. I am looking for information on the measure of Koc of ionised linear carboxylic acids (carboxylates). For instance, with the OECD 106 batch equilibrium method. Can anyone provide such information?
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