中国环境科学
 
 
中国环境科学  2020, Vol. 40 Issue (3): 983-996    DOI:
大气污染与控制 最新目录| 下期目录| 过刊浏览| 高级检索 |
宝鸡市秋冬季大气VOCs浓度特征及其O3和SOA生成潜势
张瑞旭1,2, 刘焕武3, 邓顺熙1, 芮守娟1, 王伟军1
1. 长安大学水利与环境学院, 陕西 西安 710064;
2. 长安大学旱区地下水文与生态效应教育部重点实验室, 陕西 西安 710064;
3. 西安市环境监测站, 陕西 西安 710054
Characteristics of VOCs and formation potential of O3 and SOA in autumn and winter in Baoji, China
ZHANG Rui-xu1,2, LIU Huan-wu3, DENG Shun-xi1, RUI Shou-juan1, WANG Wei-jun1
1. School of Water and Environment, Chang' an University, Xi'an 710064, China;
2. Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Chang' an University, Xi'an 710064, China;
3. Xi'an Environmental Monitoring Station, Xi'an 710054, China

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摘要 

2017年10月、12月在宝鸡市城区开展了共29d的挥发性有机物(VOCs)浓度在线监测,共测出102种VOCs,分别采用最大增量反应活性(MIR)系数法和气溶胶生成系数(FAC)法估算了宝鸡市各VOCs组分的臭氧生成潜势(OFPs)和二次有机气溶胶生成潜势(SOAFPs),筛选出生成O3与SOA活性最大的VOCs成分.结果表明:宝鸡市秋季和冬季TVOC的浓度分别为(68.62±21.85)×10-9和(42.44±16.62)×10-9,总OFPs分别为185.49×10-9和126.00×10-9,总SOAFPs分别为3.26,0.65μg/m3.秋季VOCs中含量最多的2种组分为烷烃(21.83×10-9)和芳香烃(13.37×10-9),分别占TVOC的31.82%和19.49%,乙烯、反-2-戊烯和甲苯是OFPs最大的3个成分,甲苯、间/对二甲苯和乙苯是SOAFPs最大的3个成分.而在冬季,烷烃(17.34×10-9)和炔烃(8.81×10-9)是VOCs中含量最多的2种组分,分别占TVOC的40.85%和20.75%,乙烯、丙烯、乙炔是OFPs最大的3个成分,甲苯、间/对二甲苯、乙苯是SOAFPs最大的3个成分.优先减少烯烃和芳香烃的排放是宝鸡市秋冬季抑制O3和SOA的形成的有效途径.

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关键词 挥发性有机物臭氧生成潜势二次有机气溶胶宝鸡市    
Abstract

A total of 102 ambient volatile organic compounds (VOCs) were detected during the 29-day online real-time scrutiny conducted in the urban area of Baoji during October and December, 2017. The ozone formation potential (OFPs) and the secondary organic aerosol formation potential (SOAFPs) of VOCs species were estimated using the maximum incremental reactivity (MIR) coefficient and the fractional aerosol coefficient (FAC), respectively, so as to screen out the VOCs species that had the largest contribution to the formation of O3 and SOA. The results showed that the concentration of TVOC in Baoji in the autumn and winter were (68.62±21.85)×10-9 and (42.44±16.62)×10-9. The total OFPs were 185.49×10-9 and 126.00×10-9 in the autumn and winter, respectively; the total SOAFPs were 3.26, 0.65μg/m3 in the two seasons, respectively. In the autumn, alkanes (21.83×10-9) and aromatics (13.37×10-9) contributed the highest contents, which accounted for 31.82% and 19.49% of TVOC, respectively. In the autumn, ethylene, trans-2-pentene and toluene were the species having the largest contribution to OFPs, whereas toluene, m, p-xylene and ethylbenzene were the largest contributors to SOA production. In the winter, alkane (17.34×10-9) and alkyne (8.81×10-9) were the top two abundant species, which accounted for 40.85% and 20.75% of TVOC, respectively. In the winter, ethylene, propylene and acetylene were the three major components that had the largest contribution to OFPs; whereas toluene, m-p-xylene, and ethylbenzene were the top three VOCs that had the largest contribution to SOA production. To conclude, it is an efficient way to reduce O3 and SOA pollution in autumn and winter in Baoji through controlling concentrations of alkenes and aromatics in ambient air.

Key wordsvolatile organic compounds    ozone formation potential    secondary organic aerosol    Baoji city   
收稿日期: 2019-07-20     
PACS: X513  
基金资助:

国家重点研发计划重点专项(2017YFC0212206);陕西省重点产业创新链(群)研发计划(2018ZDCXL-SF-02-05);陕西省重点产业创新链(群)研发计划(2018ZDCXL-SF-02-01)

通讯作者: 邓顺熙,教授,dengshunxi@aliyun.com     E-mail: dengshunxi@aliyun.com
作者简介: 张瑞旭(1996-),女,陕西榆林人,长安大学硕士研究生,主要从事大气污染防治方面研究.发表论文2篇.
引用本文:   
张瑞旭, 刘焕武, 邓顺熙, 芮守娟, 王伟军. 宝鸡市秋冬季大气VOCs浓度特征及其O3和SOA生成潜势[J]. 中国环境科学, 2020, 40(3): 983-996. ZHANG Rui-xu, LIU Huan-wu, DENG Shun-xi, RUI Shou-juan, WANG Wei-jun. Characteristics of VOCs and formation potential of O3 and SOA in autumn and winter in Baoji, China. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(3): 983-996.
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