Emission Fluxes of Volatile Organic Compounds from Three Heavily Polluted Rivers in Guangzhou, South China
- 323 Downloads
Emissions of volatile organic compounds (VOCs) were studied from three heavily polluted rivers (Huijiang, Nancun, and Zengbian Rivers) in Guangzhou, South China. A total of 49 species of VOCs were identified. Nancun River had the highest concentration of total VOCs (TVOCs), which ranged from 1,467 to 5,522 μg m−3. Trichloroethene, benzene, toluene, ethylbenzene, m/p-xylene, o-xylene, styrene, and 1,3,5-trimethylbenzene were the main pollutants. The levels of VOCs evaporated from the three rivers exhibited different patterns. Correlations between the concentrations of major VOCs were established and found to be statistically significant, except for o-xylene. The ratios of toluene/benzene, ethylbenzene/benzene, and xylene/benzene were estimated and found to be higher than widely reported in the literature. TVOC fluxes in the three rivers were calculated to be the range from 24.8 to 765 μg m−2 h−1. This study provides a regional background for the emission inventories of VOCs from heavily polluted rivers in southern China and provides resource managers with important information to guide remediation and policy concerning VOC emissions to the environment.
KeywordsVolatile organic compounds Polluted rivers Emission fluxes Emission inventories Guangzhou
We would like to express our appreciation for the financial support of the student research program at the Environmental Sciences and Technology, South China University of Technology. We would also like to thank Xiangjia Chen, Xiaohui Hou, Dengyu Huang, Xinyu Huang, Shuhua Zhao, Xiaochun Ma, and Zhiying Liu for their assistance with the sampling and analysis. We are also grateful to Prof. Randy Dahlgren for his assistance with revising the manuscript.
- EPA, (1999). Compendium method TO-17 determination of volatile organic compounds in ambient air using active sampling onto sorbent tubes (2nd ed.). Cincinnati, OH.Google Scholar
- HG-JWGSDEP (Hong Kong-Guangdong Joint Working Group on Sustainable Development and Environmental Protection), (2008). Pearl River Delta Regional Air Quality Management Plan Mid-term Review Report. Retrieved 17 February 2012 from http://www.legco.gov.hk/yr07-08/chinese/panels/ea/papers/ea0128cb1-666-4-ec.pdf.
- Juang, D. F., Lee, C. H., & Hsueh, S. C. (2009). Chlorinated volatile organic compounds found near the water surface of heavily polluted rivers. International Journal of Environmental Science and Technology, 6(4), 545–556.Google Scholar
- Yu, Y., Lu, Q., Zheng, J., & Zhong, L. (2011). VOC emission inventory and its uncertainty from the key VOC-related industries in the Pearl River Delta region. China Environmental Science, 31(2), 195–201.Google Scholar