土壤柱液相色谱多级吸附法测定污染物的土壤有机碳吸附常数

建立了利用土壤柱液相色谱多级吸附测定污染物的土壤有机碳吸附常数(KOC)的新方法。用这种方法通过一次实验就可获得多个不同浓度的样品在土壤中的吸附量,从而通过吸附等温线计算出KOC。用该法测定的戊唑醇、保棉磷、敌草隆、莠去津、扑草净、苯酚、萘在欧洲3#标准土壤中的log KOC分别为2.70,2.87,2.47,2.26,3.09,1.51和2.77,与文献值基本一致。

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.