POLLUTION CHARACTERISTICS AND HEALTH RISKS OF BTEX IN AMBIENT AIR OF CHANGSHA

ZOU Lilin; YAO Yunxian; JIANG Lihua; WANG Zhenzhen; ZHANG Zhou

doi:10.13205/j.hjgc.202201015

Volume 40 Issue 1

Mar. 2022

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ZOU Lilin, YAO Yunxian, JIANG Lihua, WANG Zhenzhen, ZHANG Zhou. POLLUTION CHARACTERISTICS AND HEALTH RISKS OF BTEX IN AMBIENT AIR OF CHANGSHA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 102-109. doi: 10.13205/j.hjgc.202201015

Citation:

ZOU Lilin, YAO Yunxian, JIANG Lihua, WANG Zhenzhen, ZHANG Zhou. POLLUTION CHARACTERISTICS AND HEALTH RISKS OF BTEX IN AMBIENT AIR OF CHANGSHA[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 102-109. doi: 10.13205/j.hjgc.202201015

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POLLUTION CHARACTERISTICS AND HEALTH RISKS OF BTEX IN AMBIENT AIR OF CHANGSHA

doi: 10.13205/j.hjgc.202201015

1. Changsha Center for Mineral Resources Exploration, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Changsha 410013, China;
2. Hunan Provincial Engineering Center of VOCs Monitoring Technology, Changsha Environmental Protection College, Changsha 410004, China

Received Date: 2021-03-18
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

BTEX(benzene, toluene, ethylbenzene, xylenes, etc) are volatile organic compounds which have great impact on air quality and human health. To study pollution characteristics of BTEX in Changsha, ambient samples were collected and analyzed consecutively at two typical urban sites(site S and W) during August 2017. The results showed that the averaged concentrations of BTEX were(9.84±5.44) μg/m³ at site S and(6.35±4.68) μg/m³ at site W, respectively; and m, p-xylenes were the most abundant species among BTEX with contributions of 32.3% and 26.7%, respectively, followed by toluene with contributions of 20.6% and 22.8%, respectively. Diurnal variations of major BTEX species showed a “U” pattern with lower concentrations during 13:00—14:00 and higher concentrations during 7:00—8:00 and 16:00—17:00, which might be influenced by variation of photo-chemistry reactivity and source emission. The correlations among BTEX and relative proportions of benzene, toluene and ethylbenzene suggested that traffic-relate sources, industrial sources and solvent emissions were the major sources of ambient BTEX in Changsha. The non-carcinogenic hazard quotients of BTEX(2.89×10^-4~9.35×10^-2) were all lower than 1, indicating no obvious adverse carcinogenic hazard risk on the exposed population. However, the carcinogenic hazard risk values of benzene(6.41×10^-6and 5.34×10^-6) were higher, implying the potential cancer risks due to ambient benzene exposure in the study region.
- BTEX,
- pollution characteristics,
- sources,
- health risk,
- Changsha

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References(46)

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