Citation: ZHUANG Yi, CHENG Chun-Lei, WENG Xiang, CHEN Jin-Sheng, LYU Xiao-Pu, LI Mei, ZHOU Zhen. Characteristics and Source Apportionment of Atmospheric Volatile Organic Compounds During Emission Control Period in Xiamen[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(6): 890-898. doi: 10.19756/j.issn.0253-3820.181670 shu

Characteristics and Source Apportionment of Atmospheric Volatile Organic Compounds During Emission Control Period in Xiamen

1.
Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou 510632, China;
2.
Guangzhou HeXin Instrument Co., LTD., Guangzhou 510530, China;
3.
Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;
4.
School of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China

Received Date: 23 October 2018

Fund Project: This work was supported by the National Key Research and Develpment Program of China (No.2016YFC0208503), the National Natural Science Foundation of China (Nos. 21607056, 91544226) and the National Research Program for Key Issues in Air Pollution Control (No. DQGG0107).

To investigate the characteristics and source apportionment of volatile organic compounds (VOCs) during the BRICS Conference in Xiamen and evaluate the effects of source control and mitigation policies, a online monitoring instrument (AC-GCMS 1000) was used to monitor VOCs, from August 28, 2017 to September 13 in the institute of Xiamen City, Chinese Academy of Sciences. The results showed that the concentrations of total volatile organic compounds (TVOCs) were (19.09±9.65)×10^-9(V/V), (9.39±3.35)×10^-9(V/V), (14.88±9.68)×10^-9(V/V) before, during and after the conference, respectively. During the BRICS Conference, TVOCs decreased by 51% and 37% compared with that of before and after the conference. Specifically, the oxygen volatile organic compounds (OVOCs), aromatics and alkenes, were decreased by 90%, 53% and 38% respectively. The ozone formation potential (OFP) was the highest before the conference (162.06 μg/m³), followed by that after (121.45 μg/m³) and during (77.14 μg/m³) conference. The same pattern was identified for the secondary organic aerosols potential (SOAP), which was calculated as 2.14, 1.65 and 1.93 mg/m³, respectively. Overall, both OFP and SOAP were decreased by 52% and 23%, respectively. Aromatics and Alkenes were the key contributors of OFP. Aromatics played a leading role in the formation of SOA. Five emission sources of VOCs were identified by PMF model, including vehicle exhaust, biogenic VOCs, solvent utilization, gasoline evaporation and the background VOCs. The solvent utilization source was the largest contributor of VOCs during the Xiamen BRICS Conference (32%), which was decreased by 76% compared with that before the conference. The results of this study show that the mitigation of solvent utilization and vehicle exhaust can significantly reduce the concentrations of major VOCs species, and have a great effect on the subsequent control of O₃ and SOA production. This work suggests an effective direction to control VOCs emission in Xiamen and other areas.
- Volatile organic compounds,
- Xiamen BRICS conference,
- Change characteristics of concentration,
- Source apportionment,
- Emission reduction control measures
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