| 长江口大气多氯联苯干湿沉降通量 |
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| 引用本文： | 李敏桥,林田,郭天锋,郭志刚.长江口大气多氯联苯干湿沉降通量[J].环境科学学报,2019,39(8):2717-2724. |
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| 作者姓名： | 李敏桥 林田 郭天锋 郭志刚 |
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| 作者单位： | 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳550081;中国科学院大学,北京,100049;复旦大学,环境科学与工程系,上海200433 |
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| 基金项目： | 国家自然科学基金（No.41573134） |
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| 摘 要： | 大气干、湿沉降是水体持久性有机污染物的主要来源.长江口是我国陆海相互作用研究的关键区域,是大气污染物监测的重点区域.为了解长江口大气中多氯联苯(Polychlorinated Biphenyls, PCBs)的污染特征,本研究共采集了自2013年10月—2014年8月4个季度93对大气样品(气态和颗粒态)和13个雨水样品,分析了样品中7种典型PCBs浓度并估算了PCBs的干、湿沉降通量.结果表明:①长江口大气中PCBs(气态和颗粒态)浓度范围是2.37～207 pg·m~(-3),平均浓度为44.9 pg·m~(-3);与以海洋为背景的国内外大气中PCBs相比,浓度处于中度水平;大气中PCBs主要存在于气态中,占77%;夏季气态PCBs浓度明显高于其他3个季度;颗粒态PCBs浓度呈冬、春季高,夏、秋季低的特点.②PCBs的干沉降通量为681～2330 pg·m~(-2)·d~(-1),年均值为1880 pg·m~(-2)·d~(-1),冬、春季干沉降通量明显高于夏、秋季;湿沉降通量为184～1210 pg·m~(-2)·d~(-1),年均值为863 pg·m~(-2)·d~(-1),夏季湿沉降通量明显低于其他3个季节.总体上,PCBs干、湿沉降通量年均变化为865～3300 pg·m~(-2)·d~(-1),年均值为2250 pg·m~(-2)·d~(-1),干沉降占总沉降通量的69%.
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| 关 键 词： | 多氯联苯 干湿沉降 沉降通量 长江口 |
| 收稿时间： | 2018/12/10 0:00:00 |
| 修稿时间： | 2019/3/28 0:00:00 |
Atmospheric dry and wet depositional fluxes of polychorinated biphenyls over the Yangtze River Estuary |
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| LI Minqiao,LIN Tian,GUO Tianfeng and GUO Zhigang.Atmospheric dry and wet depositional fluxes of polychorinated biphenyls over the Yangtze River Estuary[J].Acta Scientiae Circumstantiae,2019,39(8):2717-2724. |
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| Authors: | LI Minqiao LIN Tian GUO Tianfeng and GUO Zhigang |
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| Institution: | 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081;2. University of Chinese Academy of Sciences, Beijing 100049;3. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433,1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081;2. University of Chinese Academy of Sciences, Beijing 100049;3. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433,1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081;2. University of Chinese Academy of Sciences, Beijing 100049;3. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433 and 1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081;2. University of Chinese Academy of Sciences, Beijing 100049;3. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433 |
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| Abstract: | |
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| Keywords: | PCBs dry and wet deposition flux Yangtze River Estuary |
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