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Observation and analysis of atmospheric volatile organic compounds in a typical petrochemical area in Yangtze River Delta, China

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Journal of Environmental Sciences 2018年第9期30卷 233-248页

作者： Yunchen Zhang Rui Li Hongbo Fu Dong Zhou Jianmin Chen Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science & Engineering Fudan University Shanghai 200433 China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092 China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Nanjing University of Information Science and Technology Nanjing 210044 China

Volatile organic compounds （VOCs） are a kind of important precursors for ozone photochemical formation. In this study, VOCs were measured from November 5th, 2013 to January 6th, 2014 at the Second Jinshan Industrial Area, Shanghai, China. The results showed that the measured VOCs were dominated by alkanes （41.8%）, followed by aromatics （20.1%）, alkenes （17.9%）, and halo-hydrocarbons （12.5%）. The daily trend of the VOC concentration showed a bimodal feature due to the rush-hour traffic in the morning and at nightfall. Based on the VOC concentration, a receptor model of Positive Matrix Factorization （PMF） coupled with the information related to VOC sources was applied to identify the major VOC emissions. The result showed five major VOC sources： solvent use and industrial processes were responsible for about 30% of the ambient VOCs, followed by rubber chemical industrial emissions （23%）, refinery and petrochemical industrial emissions （21%）, fuel evaporations （13%） and vehicular emissions （13%）. The contribution of generalized industrial emissions was about 74% and significantly higher than that made by vehicle exhaust. Using a propylene-equivalent method, alkenes displayed the highest concentra-tion, followed by aromatics and alkanes. Based on a maximum incremental reactivity （MIR） method, the average hourly ozone formation potential （OFP） of VOCs is 220.49 ppbv. The most significant source for ozone chemical formation was identified to be rubber chemical industrial emissions, following one by vehicular emission. The data shown herein may provide useful information to develop effective VOC pollution control strategies in industrialized area.

关键词： VOCs PMF Emission sources photochemical reactivity MIR OFP

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Impact of Precursor Levels and Global Warming on Peak Ozone Concentration in the Pearl River Delta Region of China

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Advances in Atmospheric Sciences 2012年第3期29卷 635-645页

作者：魏晓琳刘倩林嘉仕王体健 Meteorological Bureau of Shenzhen Municipality Department of Civil and Structural Engineering The Hong Kong Polytechnic University School of Atmospheric Science Nanjing University

The relationship between the emission of ozone precursors and the chemical production of tropospheric ozone （03） in the Pearl River Delta Region （PRD） was studied using numerical simulation. The aim of this study was to examine the volatile organic compound （VOC）- or nitrogen oxide （NO~ =NO＋NO2）- limited conditions at present and when surface temperature is increasing due to global warming, thus to make recommendations for future ozone abatement policies for the PRD region. The model used for this application is the U.S. Environmental Protection Agency＇s （EPA＇s） third-generation air-quality modeling system; it consists of the mesoscale meteorological model MM5 and the chemical transport model named Community Multi-scale Air Quality （CMAQ）. A series of sensitivity tests were conducted to assess the influence of VOC and NO~ variations on ozone production. Tropical cyclone was shown to be one of the important synoptic weather patterns leading to ozone pollution. The simulations were based on a tropical- cyclone-related episode that occurred during 14-16 September 2004. The results show that, in the future, the control strategy for emissions should be tightened. To reduce the current level of ozone to meet the Hong Kong Environmental Protection Department （EPD） air-quality objective （hourly average of 120 ppb）, emphasis should be put on restricting the increase of NOx emissions. Furthermore, for a wide range of possible changes in precursor emissions, temperature increase will increase the ozone peak in the PRD region; the areas affected by photochemical smog are growing wider, but the locations of the ozone plume are rather invariant.

关键词： chemical transport models NOx/VOC-limited conditions photochemical reactivity global warming

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The characteristics of inorganic gases and volatile organic compounds at a remote site in the Qinghai-Tibet Plateau

The characteristics of inorganic gases and volatile organic ...

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第二十三届二氧化硫、氮氧化物和颗粒物污染防治技术研讨会

作者： Ruojie Zhao Xiaoyan Dou Nan Zhang Xueyan Zhao Wen Yang Bin Han Zhipeng Bai

In order to study the characteristics of pollutants in the remote background site of Qinghai-Tibet Plateau,volatile organic compounds（VOCs）,NO,NO,SO,CO,O and meteorological parameters（temperature,relative humidity,rainfall,horizontal wind speed and direction） were measured in the autumn of 2013 at Menyuan station（37.59 °N,101.29 °E,3250 m a.s.l.）,which is a newly established background site located in the Qinghai-Tibetan *** results indicated the distinct background characteristics and nonsignificant influence of local pollution at *** diurnal variations of NO,SO and CO all showed a bimodal pattern,which corresponded to the time of local combustion activities,and the relatively higher peak value at night was likely related to the air masses from the directions of Xining city and Menyuan *** O diurnal variation pattern and correlation analyses revealed the influence of in situ photochemical reactions and vertical mixing during the daytime and the long-range and vertically downslope transport from the upper troposphere or lower stratosphere during the nighttime.A total of 30 VOCs samples were collected and 66 VOCs species were *** was found that oxygenated volatile organic compounds（OVOCs）,halocarbons and aromatics were the relatively abundant groups,accounting for more than 80% of the *** VOCs at Menyuan station were mainly from the burning of cow dung cake,traffic emissions from a nearby provincial highway and long-distance *** LOH and OFP analysis confirmed that OVOCs and aromatics were the most active substances,and VOCs in the atmosphere of Menyuan station had relatively stable chemical compositions and low photochemical *** ratios of m,p-xylene to ethylbenzene showed the air masses arrived at Menyuan had relatively long photochemical *** the study period 51% of the total number of backward trajectories were from the southeast of Menyuan station and resulted in the elevated influence on NOx,CO a

关键词： VOCs Ozone Qinghai-Tibetan Plateau Background sites photochemical reactivity

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