Numerical simulation of PAHs sorption/desorption on soil with the influence of Tween80

【Abstract】 In this paper, the influences of inionic surfactant Tween80 on polycyc lic aromatic hydrocarbons (PAHs) sorption/desorption on artificially contaminate d soil were studied, and ?酌 model was applied to simulate the influences. Resul ts showed that, with the use of Tween 80, the sorption behaviors of PAHs on soil altered significantly. Adsorbed Tween 80 increased the sorption amount of PAHs while the dissolved Tween80 increased the apparent solubility of PAHs. These two processes exert influences on the sorption coefficient of PAHs in soil-water sy stem, which can be depicted by apparent sorption coefficient. The partition coef ficients (the soil/water partition coefficient of PAHs and surfactants obtained from sorption experiments) and statistical parameters used in the amended ?酌 mo del were obtained in independent experiments. With these parameters, the ?酌 mod el could provide a satisfactory independent prediction of PAHs release from soil to aqueous phase at two surfactant concentrations.更多还原