title: Evaluating potential non-point source loading of PAHs from contaminated soils: a fugacity-based modeling approach.
abstract: Soils contaminated by Polycyclic Aromatic Hydrocarbons (PAHs) are subject to significant non-point source (NPS) pollution during rainfall events. Recent studies revealed that the classic enrichment ratio (ER) approach may not be applicable to PAHs. This study developed a model to estimate the ER of PAHs which innovatively applies the fugacity concept. The ER model has been validated with experimental data, which suggested that the transport of PAHs not only depends on their physicochemical properties, but on the sediment composition and how the composition evolves during the event. The modeling uncertainty was systematically examined, and found to be highly compound-dependent. Based on the ER model, a strategy was proposed to practically evaluate the potential NPS loading of PAHs in watersheds with heterogeneous soils. The study results have important implications to modeling and managing the NPS pollution of PAHs (or other chemicals alike) at a watershed scale.
authors.affiliation: Center for Water Research, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Luo
authors.affiliation: Center for Water Research, College of Engineering, Peking University, Beijing 100871, China; Beijing Key Laboratory for Solid Waste Utilization and Management, College of Engineering, Peking University, Beijing 100871, China. Electronic address: yizheng@pku.edu.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Center for Water Research, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: Zhongrong
authors.initials: Z
authors.lastname: Lin
authors.affiliation: Center for Water Research, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Wu
authors.affiliation: Center for Water Research, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Han
authors.affiliation: Center for Water Research, College of Engineering, Peking University, Beijing 100871, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Tian
authors.affiliation: MOE Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: MOE Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
authors.forename: Xuejun
authors.initials: X
authors.lastname: Wang
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D004787:Environmental Pollution; D008962:Models, Theoretical; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants
keywords: Modeling; Non-point source pollution; PAHs; Soil; Uncertainty; Watershed