| 北京地区多氯联苯的湿沉降分析 |
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| 引用本文： | 李淑珍,许国飞,胡友彪.北京地区多氯联苯的湿沉降分析[J].科技成果管理与研究,2009(5):85-88,84. |
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| 作者姓名： | 李淑珍 许国飞 胡友彪 |
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| 作者单位： | 安徽理工大学,安徽,淮南,232001 |
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| 摘 要： | 本实验采集了北京市石景山区2006．5～2007．10的雨水样品，采用气相色谱（GC—ECD）检测雨水中84种多氯联苯（PCBs）。日的是为了计算雨水样品中PCBs的浓度和估计北京PCBs的湿沉降通量。雨水中∑PCBs的算术平均浓度为683±755ng／L，总质量／总体积得到的平均浓度为260ng／L。∑PCBs浓度有很大波动但是没有季节性的变化，总体呈减小趋势。对PCB异构体分析发现雨水中PCBs以2～6氯的低氯取代物为主。由2006年和2007年降雨量分别为172mm，348mm得到年湿沉降通量分别为78．01×103ng·m-2·yr-1，25．12×103ng·m-2·yr-1。
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| 关 键 词： | 气相色谱(GC-ECD) 多氯联苯(PCBs) 雨水 湿沉降通量 |
The Analysis on the Wet Deposition of Polychiornated Biphenyls in Beijing |
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| LI Shu-zhen,XU Guo-fei,HU You-biao.The Analysis on the Wet Deposition of Polychiornated Biphenyls in Beijing[J].Management and Research on Scientific & Technological Achievements,2009(5):85-88,84. |
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| Authors: | LI Shu-zhen XU Guo-fei HU You-biao |
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| Abstract: | Precipitation was sampled at Shijingshan District in Beijing from May 2006 through October 2007 and analyzed for 84 polychlornated biphenyls （PCBs）congeners by gas chromatography with electron cap ture detector （GC-ECD）. The objective was to calculate the Concentration of PCBs in each sample and estimate the wet deposition flux of PCBs to Beijing. The arithmetic mean concentration of ∑PCBs in precipitation was 683 ±755 ng/L and the volume-weighted mean concentration was 260ng/L. No seasonal trends in PCB concentrations were observed during the sampling period, althougth there are significant fluctuations and decreased trends can be observed for PCBs concentrations. It is found that the dominated PCB congeners in precipitation are 2-6 chlornated PCB which are low chlorinated PCBs. Based on that the rainfalls of 2006 and 2007 are 172mm, 384mm, the wet flux of PCBs to Beijing are 78.01×103ng·m-2·yr-1,25.12×103ng·m-2·yr-1 respectively. |
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| Keywords: | gas chromatography（GC-ECD） polychlorinated biphenyls （PCBs） precipitation wet deposition flux |
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