Abstract
Sorption coefficients (K(oc)) are useful in the prediction of whether a pesticide will remain dissolved in solution or will become adsorbed onto soil particles after its application. Measuring this process experimentally is difficult, expensive and time-consuming. Hence, much effort has been directed toward estimating K(oc) through statistical modelling. In this study, we investigated the physicochemical properties of pesticides employed by a local sugarcane company, in the northern coastal plain of Paraíba state in Brazil, by using several molecular descriptors, among them, GRid INdependent Descriptors (GRIND). Quantitative assessment of the structure-property relationship (QSPR) model indicated that size, shape, octanol-water coefficient, solubility and the balance between hydrophilic and lipophilic regions, are all relevant to K(oc) values.
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