State Key Laboratory of Marine Environmental Science, Environmental Science Research Center, Xiamen University, Xiamen, 361005, China.
Environ Monit Assess. 2010 Jul;166(1-4):29-39. doi: 10.1007/s10661-009-0982-x. Epub 2009 May 28.
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.
本研究调查了中国福建省厦门市不同城市功能区土壤多环芳烃（PAHs）的生物可给性特征。采用基于生理学的体外测试方法评估了总 PAHs 和各单体 PAHs 的生物可给性。不同功能区土壤中，PAHs 总量与胃肠道阶段的生物可给性之间无明显相关性。结果表明，胃肠道阶段的生物可给性变化（范围为 14.6%63.2%）明显高于胃阶段（范围为 4.9%21.8%）。胃肠道阶段的生物可给性不仅取决于土壤有机物质，还与各单体 PAHs 的理化性质直接相关（二环 PAHs 除外）。土壤有机物质含量增加或 PAHs 环数减少均可导致 PAH 生物可给性降低。总 PAH 的生物可给性主要由相对分子质量较高的各单体 PAH 贡献。
