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Ambient levels of volatile organic compounds in the vicinity of petrochemical industrial area of Yokohama, Japan

机译：日本横滨石化工业区附近的挥发性有机化合物的环境水平

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摘要

Urban ambient air concentrations of 39 aromatic (including benzene, toluene, and xylenes) and aliphatic volatile organic compounds (VOCs) were measured in Yokohama city, Japan. Yokohama city was selected as a case study to assess the amount of VOC released from Industrial area to characterize the ambient air quality with respect to VOC as well as to know the impact of petrochemical storage facilities on local air quality. For this purpose, ambient air samples were collected (from June 2007 to November 2008) at six selected locations which are designated as industrial, residential, or commercial areas. To find out the diurnal variations of VOC, hourly nighttime sampling was carried out for three nights at one of the industrial locations (Shiohama). Samples were analyzed using gas chromatographic system (GC-FID). Results show strong variation between day and nighttime concentrations and among the seasons. Aliphatic fractions were most abundant, suggesting petrochemical storage facilities as the major source of atmospheric hydrocarbons. High concentrations of benzene, toluene, ethyl benzene, and xylene (BTEX) were observed at industrial locations. BTEX showed strong diurnal variation which is attributed to change in meteorology. During our campaign, low ambient VOC concentrations were observed at the residential site.
机译：在日本横滨市测量了39种芳香族化合物（包括苯，甲苯和二甲苯）和脂肪族挥发性有机化合物（VOC）的城市环境空气浓度。选择横滨市为案例研究，以评估从工业区释放的VOC量，以表征相对于VOC的环境空气质量，并了解石化存储设施对当地空气质量的影响。为此，在六个选定的地点（指定为工业区，住宅区或商业区）（从2007年6月至2008年11月）收集了周围空气样本。为了找出VOC的昼夜变化，每小时在一个工业地点（Shiohama）进行了三个晚上的夜间采样。使用气相色谱系统（GC-FID）分析样品。结果显示白天和夜间浓度之间以及各个季节之间存在很大差异。脂肪馏分最丰富，表明石油化学存储设施是大气碳氢化合物的主要来源。在工业场所观察到高浓度的苯，甲苯，乙苯和二甲苯（BTEX）。 BTEX表现出强烈的昼夜变化，这归因于气象学的变化。在我们的活动期间，在居民区观察到低的VOC浓度。

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