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

作　　者：CHEN Jing WANG Xue-jun HUJun-dong XU Fu-liu TAO Shu 

机构地区：[1]College of Environmental Science, MOE Laboratory of Earth Surface Process, Peking University, Beijing 100871, China

出　　处：《Journal of Environmental Sciences》2006年第4期716-720,共5页环境科学学报（英文版）

基　　金：TheNationalBasicResearchProgramofChina(No.2003CB415004)andtheNationalNaturalScienceFoundationofChina(No.40371105,40525003,40332015)

摘　　要：In this paper, the influences of inionic surfactant Tween80 on polycyclic aromatic hydrocarbons （PAHs） sorption/desorption on artificially contaminated soil were studied, and γ model was applied to simulate the influences. Results 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 system, which can be depicted by apparent sorption coefficient. The partition coefficients （the soil/water partition coefficient of PAHs and surfactants obtained fxom sorption experiments） and statistical parameters used in the amended γ model were obtained in independent experiments. With these parameters, the γ model could provide a satisfactory independent prediction of PAHs release from soil to aqueous phase at two surfactant concentrations.In this paper, the influences of inionic surfactant Tween80 on polycyclic aromatic hydrocarbons （PAHs） sorption/desorption on artificially contaminated soil were studied, and γ model was applied to simulate the influences. Results 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 system, which can be depicted by apparent sorption coefficient. The partition coefficients （the soil/water partition coefficient of PAHs and surfactants obtained fxom sorption experiments） and statistical parameters used in the amended γ model were obtained in independent experiments. With these parameters, the γ model could provide a satisfactory independent prediction of PAHs release from soil to aqueous phase at two surfactant concentrations.

关 键 词：Tween80 PAHS SOIL sorption/desorption γ model 

分 类 号：X53[环境科学与工程—环境工程]