Ambient pollutant concentrations measured by a mobile laboratory in South Bronx, NY
Ambient pollutant concentrations measured by a mobile laboratory in South Bronx, NY
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DOI：
10.1016/j.atmosenv.2004.02.062
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发表时间：
2004-10-01
影响因子：
5
通讯作者：
Chen, LC
中科院分区：
文献类型：
--
作者：
Maciejczyk, PB;Offenberg, JH;Chen, LC
本研究的目的是表征环境空气质量的南布朗克斯，纽约市（纽约市），具有高浓度的柴油卡车和废物转运设施。我们雇用了一个移动的实验室连续测量浓度的细颗粒物（PM2.5），黑碳（BC），和气体污染物在6个地点的3 - 4周期间，2001年4月至2003年2月。还收集了24小时PM2.5综合样品进行元素和多环芳烃分析。将南布朗克斯和BC省的PM2.5水平与布朗克斯PS 154（NYSDEC站点）和下曼哈顿的亨特学院的水平进行了比较。虽然PM2.5日浓度中位数在20%以内，但南布朗克斯所有地点的每小时BC浓度中位数都较高，范围为2.2 - 3.8 mug m（-3），而亨特学院为1.0-2.6 mug m（-3）。在南布朗克斯的另外27个采样点沿沿着主要公路进行了连续的风速计测量。BC浓度在每个站点内变化，取决于一天中的时间，站点之间具有很大的空间变异性。在工作日，BC的日平均浓度在1.7 ~ 12 mug m（-3）之间变化，在周末则较低（0.50-2.9 mug m（-3））;除了Ni和V之外，南布朗克斯所有站点的元素浓度都高于亨特学院的所有测量元素，而在工业区Hunts Point，元素浓度大约高出2.5倍。35种多环芳烃的平均总和为225 ng m（-3），是新泽西州泽西城代表性区域浓度的4.5倍。在单个多环芳烃中，3，6-二甲基菲的浓度最高，整体多环芳烃指纹不同于泽西城的信号。我们的数据表明，与纽约市其他地区相比，环绕南布朗克斯的高速公路对居民暴露于污染物有着可衡量的不利影响。(C)2004爱思唯尔有限公司保留所有权利。
The objective of this study is to characterize the ambient air quality of the South Bronx, New York City (NYC), having high concentrations of diesel trucks and waste transfer facilities. We employed a mobile laboratory for continuous measurements of concentrations of fine particulate matter (PM2.5), black carbon (BC), and gaseous pollutants at 6 locations for three-four weeks each during the period of April 2001-February 2003. Integrated 24-hr PM2.5 samples were also collected for elemental and PAHs analyses. South Bronx PM2.5 and BC levels were compared to those at Bronx PS 154 (NYSDEC site) and at Hunter College in the Lower Manhattan. Although the median daily PM2.5 concentrations agreed within 20%, the median hourly BC concentrations were higher at all South Bronx sites ranging from 2.2 to 3.8 mug m(-3), compared to 1.0-2.6 mug m(-3) at Hunter College. Continuous Aethelometer measurements at additional 27 sampling sites in the South Bronx were conducted along major highways. BC concentrations Varied within each site, depending on time-of-day, with a large spatial variability from site-to-site. Daily median BC concentrations varied from 1.7 to 12 mug m(-3) on the weekdays, and were lower (0.50-2.9 mug m(-3)) on the weekends; Elemental concentrations were higher at all South Bronx sites than those at Hunter College for all measured elements but Ni and V, and at the Hunts Point, an industrial location, were approximately 2.5-fold higher. The average sum of 35 PAHs was 225 ng m(-3), which is 4.5 times larger than representative regional concentrations in Jersey City, NJ. Among the individual PAHs, 3,6-dimethylphenanthrene had the highest concentrations, and the overall PAH fingerprint differed from signal for Jersey City. Our data indicates that highways encircling the South Bronx are having a measurable adverse influence on residents' exposure to pollutants compared to other NYC areas. (C) 2004 Elsevier Ltd. All rights reserved.