title: Assessment of the bioaccessibility of polycyclic aromatic hydrocarbons in topsoils from different urban functional areas using an in vitro gastrointestinal test.
abstract: Profiles of the bioaccessibility of soil polycyclic aromatic hydrocarbons (PAHs) in different urban functional areas of Xiamen City, Fujian, China were investigated. A physiologically based in vitro test was used to evaluate the bioaccessibility of total and individual PAHs. There was no obvious correlation between total concentrations of PAHs and bioaccessibility during the gastrointestinal phase for the soils from different functional areas. Results showed that the bioaccessibility variation in the gastrointestinal phase (ranging from 14.6% to 63.2%) was significantly higher than that in the gastric phase (ranging from 4.9% to 21.8%). The bioaccessibility in the gastrointestinal phase was not only determined by soil organic materials but also directly related to physical and chemical properties of individual PAHs, except for two-ring PAHs. Increasing soil organic material content or decreasing ring numbers of PAHs could result in the decrease of PAH bioaccessibility. The total PAH bioaccessibility was largely contributed by individual PAHs with relatively high molecular weight.
authors.affiliation: State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen, 361005, China.
authors.forename: Min
authors.initials: M
authors.lastname: Lu
authors.forename: Dongxing
authors.initials: D
authors.lastname: Yuan
authors.forename: Qingmei
authors.initials: Q
authors.lastname: Lin
authors.forename: Tong
authors.initials: T
authors.lastname: Ouyang
mesh_terms: D002947:Cities; D004781:Environmental Exposure / Q000032:analysis*; D004784:Environmental Monitoring; D041981:Gastrointestinal Tract / Q000378:metabolism; D006801:Humans; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000378:metabolism; D018570:Risk Assessment; D012989:Soil Pollutants / Q000032:analysis* / Q000378:metabolism
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants