| Title: | [Characteristics and Reactivity of VOCs in a Typical Industrial City in Summer] |
| Author(s): | Qin T; Li LM; Wang XW; Yang W; Wang XL; Xu B; Geng CM; |
| Address: | "State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. College of Environmental Science & Safety Engineering, Tianjin University of Technology, Tianjin 300384, China. Shandong Zibo Eco-Environmental Monitoring Center, Zibo 255000, China" |
| DOI: | 10.13227/j.hjkx.202111073 |
| ISSN/ISBN: | 0250-3301 (Print) 0250-3301 (Linking) |
| Abstract: | "To investigate the ambient pollution caused by volatile organic compounds (VOCs) in a typical industrial city in summer, the characteristics and chemical reactivity from VOCs and the causes of ozone (O(3)) pollution were analyzed using online VOCs measurements during polluted and non-polluted periods in Zibo city in July 2020. The results showed that the average hourly concentration of total volatile organic compounds (TVOC) during the polluted period[(50.6+/-28.3)] mug.m(-3) was 32.5% higher than that during the non-polluted period[(38.2+/-24.9) mug.m(-3)]. The contribution of all VOCs categories were as follows:alkanes>aromatics>alkenes>alkynes, and the diurnal averages of TVOC and O(3) concentrations were opposite during the polluted and non-polluted period. Ozone formation potential (OFP),.OH radical loss rate (L(.OH)), and secondary organic aerosol formation potential (SOA(p)) during the polluted period were higher than those during the non-polluted period. Alkenes contributed most to OFP and L(.OH), whereas aromatics contributed most to SOA(p). The tendency of the diurnal average of OFP and SOA(p) was overall consistent with that of TVOC. The priority species of OFP, L(.OH), and SOA(p) were alkenes and aromatics. The VOCs/NO(x) method was applied to identify the O(3)-VOC-NO(x) sensitivity during the polluted and non-polluted periods, and the results showed that the photochemical regimes were VOCs-limited and transition regions. In addition, the smog production model (SPM) was employed to identify the O(3) formation regime, and the results showed that those during the polluted period were identified as VOCs-limited and transition regions from 08:00 to 16:00, whereas the non-polluted period was mainly considered to be VOCs-limited. To mitigate the O(3) pollution in summertime, the synergistic control of VOCs (especially alkenes and aromatics) and NO(x) emissions should be enforced" |
| Keywords: | *Air Pollutants/analysis Alkenes China Environmental Monitoring *Ozone/analysis *Volatile Organic Compounds/analysis ozone formation potential (OFP) ozone sensitivity secondary organic aerosol formation potential (SOAp) volatile organic compounds (VOCs) .; |
| Notes: | "MedlineQin, Tao Li, Li-Ming Wang, Xin-Wu Yang, Wen Wang, Xiao-Li Xu, Bo Geng, Chun-Mei chi China 2022/08/17 Huan Jing Ke Xue. 2022 Aug 8; 43(8):3934-3943. doi: 10.13227/j.hjkx.202111073" |
