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Arid Land Geography ›› 2019, Vol. 42 ›› Issue (2): 280-287.doi: 10.12118/j.issn.1000-6060.2019.02.07

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The annual changes of concentration level and the kinds of VOCs in Kuitun

GUO Yu-hong1, ZHU qiaoqiao1,2,3, YANG chun1, YANG rongjiang5, GU chao1, ZHANG Xiao-xiao4, LIU wenjiang4,TIAN Qin5   

  1. (1. Xinjiang Environmental Monitor Centre, Ministry of Environment Protection, Urumqi 830011, China;2. Zhejiang Economic Information Center (Zhejiang Center for Climate Change and Low-carbon Development Cooperation), Hangzhou 310006, Zhejiang, China;3. Postdoctoral Station of Environmental Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;4.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.5. Kuitun Environmental Monitoring Station, Urumqi 833200, China;)
  • Online:2019-03-25 Published:2019-03-07

Abstract: To find the real-time concentrations and temporal distribution of volatile organic compounds (VOCs) in Kuitun, Xinjiang, China, VOCs were observed by using online gas chromatograph on a roof of a building which was 25 meters high during 2013 to 2015. The results show that the range of annual average concentration of total VOCs (TVOCs) in Kuitun is from 64.8 to 82.8 ppbv, and the main classes of VOCs are light alkanes, light olefins, high alkanes, benzene series and high olefins, which accounted for 84.1% of TVOCs. The concentration of VOCs in winter was 4.5 times more than the annual average, and 5 times higher than that in summer. Compared with other cities, the concentration level of VOCs in Kuitun is higher as a whole. Compared with the last two years, the percentages of halohydrocarbon, benzene series and oxygen (nitrogen) VOCs in air was obviously increased by 15.6%, 6.5% and 5.9% respectively in 2015, so did the proportion of poisonous and harmful compositions of VOCs in air. Due to the easier photochemical reaction of halohydrocarbon than other organic matters under the same conditions, the ability of photochemical reaction has been increased constantly from the change trend point of view about the  high content of halohydrocarbon in summer.

Key words: VOCs, kinds, concentration level, annual change, characteristic