| 泉州市表层土中多环芳烃的含量、来源及其生态风险评价 |
| 摘要点击 2194 全文点击 1494 投稿时间：2010-10-26 修订日期：2010-12-07 |
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| 中文关键词 土壤 多环芳烃 分布 组成 源解析 生态风险评价 |
| 英文关键词 soils polycyclic aromatic hydrocarbons distribution composition source apportionment ecological risk assessment |
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| 中文摘要 |
| 采集了泉州市不同功能区的33 个表层土壤(0～10 cm)样品，利用超高效液相色谱系统 (UPLC)-荧光检测器法，研究了土壤中 15 种优控多环芳烃的含量和分布特征，并利用比值法、因子分析和多元线性回归法对其来源进行了分析，以及采用苯并(a)芘的毒性当量浓度(TEQBap )评价了土壤中 PAHs 的生态风险. 结果表明，土壤中 15 种 PAHs 总量范围为 28.2～1432.3 μg·kg-1，以 4～6 环 PAHs 为主. 不同功能区土样中 PAHs 含量高低顺序为工业区 > 居民区 > 风景区 > 农业区. 土壤中 PAHs 主要来源于煤、生物质燃料(秸秆)、液体化石燃料(汽油、柴油)的燃烧. 土样中 15 种 PAHs 的 TEQBaP 范围为 1.6～131.6 μg·kg-1，平均值为 38.9 μg·kg-1. 在 34.6%的土样中，10 种 PAHs 的总 TEQBaP 超过荷兰土壤目标参考值，表明泉州市部分表层土壤中 PAHs 有潜在的生态风险. |
| 英文摘要 |
| The concentrations of 15 US EPA priority polycyclic aromatic hydrocarbons (PAHs) in 33 soil samples (0-10 cm layer) collected from various functional zones in Quanzhou city were analyzed by UPLC coupled with fluorescence detector. The sources of PAHs in the topsoils were apportioned using isomer ratios, and factor analysis and multiple linear regression. The ecological risks of PAHs in the topsoils were evaluated by using benzo［a］pyrene toxic equivalents (TEQBaP). Results showed that the total concentrations of PAHs in the soils ranged from 28.2 to 1432.3 μg·kg-1, and 4 to 6 ring PAHs were the dominant compounds. The total concentrations of PAHs in soil samples from different functional zones decreased in the order of industrial areas > residential areas > scenic areas > agricultural fields. The PAHs in soils of Quanzhou city mainly originated from the combustion of coal, biomass fuels (straw), and liquid fossil fuels including gasoline and diesel. The TEQBaP of the 15 PAHs ranged from 1.6 to 131.6 μg·kg-1, with an average value of 38.9 μg·kg-1. The total TEQBaP of 10 PAHs in 34.6% of the soil samples exceeded the Dutch target reference value, suggesting that there are potential ecological risks in the topsoils in some areas of Quanzhou city. |
