A comparative study of the sorption of O-PAHs and PAHs onto soils to understand their transport in soils and groundwater  

作　　者：W.Almouallem J.Michel S.Dorge C.Joyeux G.Trouve D.Le Nouen 

机构地区：[1]French National Institute for Industrial and Environment and Risks,Direction Sites&Territoires,Verneuil en Halatte,F-60550,France [2]University of Haute-Alsace,Laboratoire Gestion des Risques et Environnement(LGRE)UR2334,Mulhouse,France [3]University of Strasbourg,67000 Strasbourg,France [4]University of Haute-Alsace,Laboratoire d’Innovation Moléculaire et Applications(LIMA)UMR 7042 CNRS,Mulhouse,France

出　　处：《Journal of Environmental Sciences》2023年第2期61-75,共15页环境科学学报（英文版）

基　　金：the French National Institute for Industrial and Environment and Risks, and the French National Agency for Ecological Transition for their financial support

摘　　要：Polycyclic aromatic hydrocarbons(PAHs)and their oxygenated derivates(O-PAHs)are identified in soils and groundwater of industrialized sites and contribute to the risk for Humans and the Environment.Nevertheless,data are scarce in literature concerning their retention and transfer in soils and no soil-water partition coefficients are available for these compounds.Sorption of two PAHs,fluorene and acenaphthene and two O-PAHs,9H-fluorenone and dibenzofuran onto two soils with different organic carbon contents was evaluated and compared by determining their sorption isotherms.Effect of ionic strength and liquid to solid ratio,on fluorene and fluorenone sorption was also evaluated.Sorption equilibrium is achieved within less than 24 hr of mixing and linear sorption models best fit the isotherm data.Acenaphthene and dibenzofuran are similarly sorbed onto the soil.KD of fluorene is higher than the one of fluorenone,showing a smaller affinity of fluorenone towards the solid phase.This means that O-PAH could form larger contamination plumes in groundwater than PAHs.Decreasing the L/S ratio from 100 to 50 and 30,increases the sorption of fluorenone onto the soil by 56% and 67%respectively,while the sorption of fluorene is slightly increased.Increasing the ionic strength of the aqueous phase also modifies the sorption of fluorenone,contrary to the sorption of fluorene which is slightly affected.

关 键 词：PAHS O-PAHs Contaminated soils GROUNDWATER SORPTION Kinetics Isotherms 

分 类 号：X53[环境科学与工程—环境工程] X523