| 张琦,裴国霞,李汗青,刘耕耘.黄河头道拐段冰体中多环芳烃的分布特征及来源解析[J].农业环境科学学报,2014,33(11):2221-2227. |
| 黄河头道拐段冰体中多环芳烃的分布特征及来源解析 |
| Distribution and Sources of Polycyclic Aromatic Hydrocarbons in Ice of Toudaoguai Section of the Yellow River |
| 投稿时间：2014-05-14 |
| DOI：10.11654/jaes.2014.11.021 |
| 中文关键词: 黄河头道拐断面 冰体 多环芳烃 分布特征 来源解析 |
| 英文关键词: Toudaoguai section ice body polycyclic aromatic hydrocarbon(PAH) distribution source apportionment |
| 基金项目:国家自然科学基金资助项目(51169018) |
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| 中文摘要: |
| 采集黄河头道拐断面冰体样品,用毛细管GC-FID方法测定了冰体中EPA优先控制的16种多环芳烃(Polycyclic aromatic hydrocarbons,PAHs)的残留水平。结果表明,16种PAHs的加标回收率为80.3%~106.1%,方法检出限的范围为0.01~0.12 ng·L-1,适合该断面冰体样品中PAHs的测定。27个冰体样品中16种PAHs的含量范围为0.71~11.04 ng·L-1,平均含量为3.88 ng·L-1。其中荧蒽(Fla)和芘(Pyr)为最主要的污染物,检出率分别为72.7% 和86.4%。PAHs的时空分布具有一定的规律性,凌汛期含量较少,初始冰盖形成后达到最大值,当河道内连续冰盖形成后,随冰层厚度的增加呈下降趋势,且下层冰体含量高于上层冰体。运用主成分分析法定量解析其污染来源,从16种PAHs中提取3个主成分,总方差贡献率为80.5%,主成分的贡献率分别为煤炭燃烧源36.6%、交通源36.4%及炼焦和木材燃烧来源7.5%。 |
| 英文摘要: |
| Polycyclic aromatic hydrocarbons(PAHs) are ubiquitous and carcinogenic in nature. We collected ice samples from Toudaoguai section of the Yellow River and analyzed residual levels of 16 US EPA PAHs using GC-FID. The results showed that overall recoveries were ranged from 80.3%~106.1% with detection limits of 0.01~0.12 ng·L-1. The method approved to be fit for the determination of PAHs in ice samples. The concentrations of PAHs were in the ranges of 0.71~11.04 ng·L-1, with a mean concentration of 3.88 ng·L-1. The detection frequency for major pollutants Fluoranthene(Fla) and Pyrene(Pyr) was 72.70% and 86.40%, respectively. The concentrations of PAHs showed a decline as the thickness of ice increased, and were higher in the lower than in the upper part of ice body. Principal component analysis identified that three sources were the major contributor to PAHs. They were coal combustion(36.6%), traffic source(36.4%), and coking and wood combustion(7.5%). |
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