| 辽河水系沉积物中PAHs的分布特征及风险评估 |
| 摘要点击 2709 全文点击 1396 投稿时间：2012-01-11 修订日期：2012-06-25 |
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| 中文关键词 辽河 表层沉积物 多环芳烃 平均沉积物质量基准商 风险评价 |
| 英文关键词 Liaohe River surface sediment polycyclic aromatic hydrocarbons (PAHs) mean sediment quality guideline(m SQG-Q) risk assessment |
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| 中文摘要 |
| 采用GC-MS方法测定了辽河流域19个采样点位枯水期以及丰水期表层沉积物中多环芳烃(PAHs)的含量,共检出15种PAHs. 枯水期ΣPAHs为123.5~21233.4 ng·g-1,平均含量为3208.1 ng·g-1; 丰水期ΣPAHs为37.9~9014.0 ng·g-1,平均含量为1612.0 ng·g-1. 利用特征化合物指数法对PAHs进行源分析,主要来源是燃料燃烧. 运用平均沉积物质量基准商(mSQG-Q)对辽河流域PAHs进行风险评价,芴和芘存在中低度生态效应; 丰水期抚顺段L3-1有较强的负面效应,枯水期沈阳段L1-1点位、抚顺段L3-1和L3-2有较强的负面效应. |
| 英文摘要 |
| Nineteen surface sediment samples were collected from Liaohe River and analysed for polycyclic aromatic hydrocarbons (PAHs) with GC-MS. The concentrations of 15 detected PAH compounds ranged from 123.5 to 21233.4 ng·g-1 in dry season with the average concentration was 3208.1 ng·g-1; and were 37.9 to 9014.0 ng·g-1 in wet season with the average concentration was 1612.0 ng·g-1. The isomeric ratio method using characteristic compounds of PAHs for source analysis, and the main source was attributed to fuel combustion. Average commercial use of sediment quality benchmarks (mSQG-Q) on the PAHs risk assessment of Liaohe Basin was applied, fluorene and pyrene showed the potential of low-level ecological effects. In wet season, Fushun segment L3-1 points have a higher ecological risk. In dry season, Shenyang segment L1-1 point, Fushun segment L3-1 point and L3-2 point pose a strong negative effect. |
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