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| Stable hydrogen isotope analyses and source apportionments of mono-aromatic compounds in Taiyuan, China |
| LI Ying-hui1,2, YAN Yu-long1, HU Dong-mei1, XU Yang1, WANG Cheng1, LI Ru-mei1, CAO Jing-yuan1, PENG Lin1 |
1. Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;
2. Renewable Energy School, North China Electric Power University, Beijing 102206, China |
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Abstract Mono-aromatic compounds samples from five various emission sources and ambient air of two areas (south area of the city and north area of the city) were collected in Taiyuan. The stable hydrogen isotope(δD) composition characteristics and conversion processes of samples was identified and analyzed. The source apportionment was discussed on the basis of the initial mixed δD value calculated through the hydrogen isotope mass balance equation. The results revealed that the δD values of mono-aromatic in samples of five emission sources were with a range of (-138.7‰~-115.5‰) of diesel volatilization, (-147.0‰~-121.0‰) of solvent evaporation, (-150.8‰~-117.6‰) of gasoline volatilization (97#), (-131.8‰~-113.8‰) of gasoline volatilization (95#), (-171.2‰~-120.0‰) of vehicle exhaust (97#), (-138.9‰~-102.7‰) of vehicle exhaust (95#), and (-168.3‰~-142.3‰) of domestic coal combustion. The δD value of benzene was significantly lower in vehicle exhaust than in gasoline volatilization. The δD values of mono-aromatic in the north area of the city ranged from -131.7‰ to -115.1‰, while -131.9‰ to -74.9‰ in the south area Taiyuan city. The initial mixed values of δD in the north of city and the south of city were -138.4‰ and -173.9‰, respectively. The results showed that the sources of mono-aromatic compounds in the atmosphere were different in the south area and north area of Taiyuan city.
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Received: 05 August 2019
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