辽河水系沉积物中PAHs的分布特征及风险评估  

Spatial Distribution and Risk Assessment of Polycyclic Aromatic Hydrocarbons in Partial Surface Sediments of Liaohe River

作　　者：武江越[1,2] 刘征涛[2] 周俊丽[2] 高富[2] 

机构地区：[1]北京师范大学水科学研究院,北京100875 [2]中国环境科学研究院,国家环境保护化学品生态效应与风险评估重点实验室,北京100012

出　　处：《环境科学》2012年第12期4244-4250,共7页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07501-003)

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123.5～21 233.4 ng·g-1,平均含量为3 208.1 ng·g-1;丰水期ΣPAHs为37.9～9 014.0ng·g-1,平均含量为1 612.0 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.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 21 233.4 ng·g^-1 in dry season with the average concentration was 3 208. 1 ng·g^-1; and were 37.9 to 9 014. 0ng·g^-1 in wet season with the average concentration was 1 612.0 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 LI-1 point, Fushun segment L3-1 point and L3-2 point pose a strong negative effect.

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 

分 类 号：X131.2[环境科学与工程—环境科学] X820.4