QSAR FOR ORGANIC-CHEMICAL SORPTION IN SOILS AND SEDIMENTS

Sorption phenomena exert important influences on the environmental fat e of anthropogenic organic substances. Under these conditions, the aim of this study was to propose a general QSAR model using the physicoch emical properties of the molecules (i.e. log K(ow) and pKa) and some r elevant properties of soils or sediments (i.e. pH and %OC) to estimate the sorption behavior of both ionized and non-ionized chemicals. The proposed model was elaborated from 229 K(p) values recorded for 53 che micals. The model was then tested on 500 other K(p) values obtained fo r 87 chemicals.