Characteristics and source apportionment of VOCs measured in Shanghai, China
Characteristics and source apportionment of VOCs measured in Shanghai, China
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DOI：
10.1016/j.atmosenv.2010.07.059
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发表时间：
2010-12-01
影响因子：
5
通讯作者：
An, Junlin
中科院分区：
文献类型：
--
作者：
Cai, Changjie;Geng, Fuhai;An, Junlin
2007 - 2010年，对上海市中心城区的挥发性有机物（VOCs）进行了监测。由于VOCs是臭氧光化学形成的重要前体物，因此，需要对VOCs的来源进行详细的调查。结果表明，上海市中心城区的VOC主要是烷烃（43%）和芳烃（30%），其次是卤代烃（14%）和烯烃（6%）。基于测量的VOC浓度，（PMF正矩阵分解）加上与VOC源相关的信息结果表明，PMF法可识别出7种主要的VOC源，其中（1）机动车相关源，占25%;在所测量的VOC浓度中，（2）基于溶剂的工业来源为17%（3）燃料蒸发为15%（4）油漆溶剂使用为15%（5）钢铁相关工业生产为12%（6）生物质/生物燃料燃烧为9%和（7）燃煤为7%此外，通过MIR计算了与VOC源相关的臭氧生成潜势（最大增量反应性）技术臭氧形成潜力的最重要的VOC来源是溶剂型工业来源（27%）油漆溶剂使用（24%）汽车相关排放（17%）、钢铁相关工业生产（14%）、燃料蒸发（9%）、燃煤（6%）和生物质/生物燃料燃烧（3%）周末效应对VOC浓度的影响表明，在采样点，VOC浓度通常在工作日高于周末，这表明交通条件和人类活动对VOC浓度有重要影响。2010年上海市VOC排放量（C）Elsevier Ltd发布
Volatile organic compounds (VOCs) were measured from 2007 to 2010 at the center of Shanghai China Because VOCs are Important precursors for ozone photochemical formation detailed information of VOC sources needs to be investigated The results show that the measured VOC concentrations in Shanghai are dominated by alkanes (43%) and aromatics (30%) following by halo-hydrocarbons (14%) and alkenes (6%) Based on the measured VOC concentrations a receptor model (PMF positive matrix factorization) coupled with the information related to VOC sources (the distribution of major industrial complex meteorological conditions etc) is applied to identify the major VOC sources in Shanghai The result shows that seven major VOC sources are identified by the PMF method including (1) vehicle related source which contributes to 25% of the measured VOC concentrations (2) solvent based industrial source to 17% (3) fuel evaporation to 15% (4) paint solvent usage to 15% (5) steel related industrial production to 12% (6) biomass/biofuel burning to 9% and (7) coal burning to 7% Furthermore ozone formation potential related to VOC sources is calculated by the MIR (maximum incremental reactivity) technique The most significant VOC source for ozone formation potential is solvent based industrial sources (27%) paint solvent usage (24%) vehicle related emissions (17%) steel related industrial productions (14%) fuel evaporations (9%) coal burning (6%) and biomass/biofuel burning (3%) The weekend effect on the VOC concentrations shows that VOC concentrations are generally higher in the weekdays than in the weekends at the sampling site suggesting that traffic conditions and human activities have important impacts on the VOC emissions in Shanghai (C) 2010 Published by Elsevier Ltd