[Determination of soil organic carbon adsorption coefficients of pollutants using soil column liquid chromatography with stepwise adsorption].

A novel method for the determination of soil organic carbon adsorption coefficients (K(oc)) of pollutants was established using soil column liquid chromatography with stepwise adsorption. With this method the adsorption amount of samples at various concentrations on soil can be obtained in a single experiment. The values of K(oc) can be calculated through adsorption isotherms. The soil column can be used without change or desorption throughout the whole experiment. This method leads to a shorter experimental duration, simplified experimental procedure and experimental error reduction. The values of log K(oc) for tebuconazole, azinphos-methyl, diuron, atrazine, prometryn, phenol and naphthalene on the European reference soil of 3# were measured to be 2.70, 2.87, 2.47, 2.26, 3.09, 1.51 and 2.77, respectively, which are consistent with the values reported in the literature.