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首页> 外文期刊>Environmental forensics >Sources and Wet Deposition Fluxes of Polycyclic Aromatic Hydrocarbons (PAHs) in an Urban Site 1000 Meters High in Central Anatolia (Turkey)
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Sources and Wet Deposition Fluxes of Polycyclic Aromatic Hydrocarbons (PAHs) in an Urban Site 1000 Meters High in Central Anatolia (Turkey)

机译：安纳托利亚中部（土耳其）高1000米的城市场地中多环芳烃（PAH）的来源和湿沉降通量

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Wet-only precipitation samples were collected using an Andersen wet only sampler (Andersen Samplers, Inc., Atlanta, GA, USA), between December 2000 and June 2002, in Ankara, Turkey. Polycyclic aromatic hydrocarbons (PAHs) were first pre-concentrated using solid phase (SPE) and ultrasonic extraction procedures. They were then analyzed using gas chromatography-mass spectrom-etry (GC-MS). Phenanthrene (Phe), fluoranthene (Flt), benzo (b+k) fluoranthene (B (b+k) F) and pyrene (Pyr) were the major components of Σ14PAH concentrations during both winter and summer seasons. Concentrations of PAHs did not show a statistically significant relation with meteorological parameters, such as mixing height, wind speed, and wind direction. However, they showed a strong linear relation with the ventilation coefficient (VC), signifying the importance of local sources on measured PAH concentrations. Concentrations of PAHs in winter season were higher than their corresponding concentrations in summer season due to seasonal variations in meteorology and emissions. Sources of PAHs in rainwater were apportioned using principal component analysis. Three factors with eigenvalues > 1.0 were extracted. The two factors that explained the largest fraction of system variance represented coal and gas combustion whereas the third factor represented motor vehicles. Half of the rain events accounted for approximately 90% of the wet deposition fluxes of PAHs, demonstrating the highly episodic nature of wet PAH deposition.
机译：从2000年12月至2002年6月，在土耳其安卡拉使用Andersen仅湿润采样器（Andersen Samplers，Inc.，亚特兰大，美国）收集纯湿降水样品。首先使用固相（SPE）和超声提取程序对多环芳烃（PAH）进行预浓缩。然后使用气相色谱-质谱法（GC-MS）对它们进行分析。在冬季和夏季，菲（Phe），荧蒽（Flt），苯并（b + k）荧蒽（B（b + k）F）和pyr（Pyr）是Σ14PAH浓度的主要成分。 PAHs的浓度与气象参数（如混合高度，风速和风向）没有统计学上的显着关系。但是，它们与通风系数（VC）表现出很强的线性关系，表明本地来源对所测PAH浓度的重要性。由于气象和排放的季节性变化，冬季的PAHs浓度高于夏季的相应浓度。雨水中多环芳烃的来源采用主成分分析法进行了分配。提取特征值> 1.0的三个因子。解释系统差异最大部分的两个因素代表煤炭和天然气燃烧，而第三个因素代表机动车。一半的降雨事件约占PAHs湿沉积通量的90％，这证明了湿PAH沉积的高度偶发性。

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