Urban Contamination of the Chicago/Coastal Lake Michigan Atmosphere by PCBs and PAHs during AEOLOS
Urban Contamination of the Chicago/Coastal Lake Michigan Atmosphere by PCBs and PAHs during AEOLOS
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DOI：
10.1021/es9609765
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发表时间：
1997-06
影响因子：
11.4
通讯作者：
M. Simcik;Huixiang Zhang;S. Eisenreich;Thomas P. Franz
中科院分区：
文献类型：
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作者：
M. Simcik;Huixiang Zhang;S. Eisenreich;Thomas P. Franz
空气中的多氯联苯和多环芳烃的浓度进行了测量，在城市/工业综合体的芝加哥，IL，密歇根湖南部，并在非城市地区的AEOLOS（湖泊和海洋大气交换）项目的一部分。在1994年5月和7月以及1995年1月期间，在密集的实验中同时收集了空气样品，以确定来自芝加哥城市/工业综合体的污染空气质量对密歇根湖南部大气的影响。在近海10 - 20公里处的湖面上，气相∑PAH浓度范围为0.8 - 70纳克/立方米，而城市空气浓度为27 - 430纳克/立方米。气相多环芳烃在白天的光氧化导致白天过湖的浓度是75%，低于相应的夜间浓度。气相∑PCB浓度在湖面上为0.14至1.1纳克/立方米，在市区为0.27至14纳克/立方米。由于夏季挥发量较高，∑PCB浓度随季节变化。最高浓度…
Air concentrations of PCBs and PAHs were measured in the urban/industrial complex of Chicago, IL, over southern Lake Michigan, and in a non-urban area as part of the AEOLOS (Atmospheric Exchange Over Lakes and Oceans) Project. Air samples were collected simultaneously in intensive experiments during May and July 1994 and January 1995 in order to determine the influence of contaminated air masses from the Chicago urban/industrial complex on the southern Lake Michigan atmosphere. Gas phase ∑PAH concentrations over the lake ∼10−20 km offshore ranged from 0.8 to 70 ng/m3 while urban air concentrations were 27−430 ng/m3. Photooxidation of gas phase PAHs during the day resulted in daytime over-lake concentrations that were ∼75% less than corresponding nighttime concentrations. Gas phase ∑PCB concentrations ranged from 0.14 to 1.1 ng/m3 over the lake and from 0.27 to 14 ng/m3 in the urban area. ∑PCB concentrations varied seasonally as a result of higher volatilization during the summer. The highest concentration...