Wang Hong-Li, Chen Chang-Hong, Huang Hai-Ying, Wang Qian, Chen Yi-Ran, Huang Cheng, Li Li, Zhang Gang-Feng, Chen Ming-Hua, Lou Sheng-Rong, Qiao Li-Ping
Shanghai Academy of Environmental Sciences, Shanghai 200233, China.
Huan Jing Ke Xue. 2012 Dec;33(12):4151-8.
The emission strength of VOCs was estimated in the study, based on the volatile organic compounds (VOCs) measurement results. Air mass backward trajectories were computed and cluster analysis was done combining with the corresponding air pollution indexes and VOCs concentrations. Source apportionment of VOCs was studied using receptor model. According to this study, VOCs emission in Shanghai per hour resulted in the VOCs concentration increment of (5.98 +/- 3.18) x 10(-9) during 2010 EXPO (from 1st May to 31st October in 2010), which was decreased by about 1 x 10(-9) compared to that in the same period of 2009. Under the control of the air masses roughly from the east (40%), the API was lower than 50. Influenced by the air masses from the northwest, the air quality was the worst with the average API higher than 70. The air masses from the southwest also resulted in bad air quality, with API higher than 60. The air masses originated from the west accounted for 25%, followed by the south and north air mass (20%). The VOCs concentrations were positively related to API in the same air mass, R2 = 0.599. During the 2010 EXPO, the emission related to vehicles including exhaust and gasoline evaporation contributed the largest amount of VOCs, approximately about -40%, followed by industry including industrial processes and coal combustion (30% - 40%), and solvent use and painting (20%). The biogenic emission was also considerable and accounted for 6% of VOCs in summer.
本研究基于挥发性有机化合物（VOCs）的测量结果估算了VOCs的排放强度。计算了气团后向轨迹，并结合相应的空气污染指数和VOCs浓度进行了聚类分析。使用受体模型研究了VOCs的源解析。根据本研究，2010年世博会期间（2010年5月1日至10月31日），上海每小时的VOCs排放导致VOCs浓度增量为(5.98±3.18)×10⁻⁹，与2009年同期相比降低了约1×10⁻⁹。在大致来自东部的气团（40%）控制下，空气污染指数低于50。受来自西北方向气团的影响，空气质量最差，平均空气污染指数高于70。来自西南方向的气团也导致空气质量较差，空气污染指数高于60。来自西部的气团占25%，其次是来自南部和北部的气团（20%）。在同一气团中，VOCs浓度与空气污染指数呈正相关，R² = 0.599。在2010年世博会期间，与车辆相关的排放（包括尾气排放和汽油挥发）贡献的VOCs量最大，约为40%，其次是工业排放（包括工业过程和煤炭燃烧，占30% - 40%）以及溶剂使用和涂装排放（占20%）。生物源排放也相当可观，在夏季占VOCs的6%。
