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J Environ Sci (China)

Title:		"Biogenic volatile organic compound emission patterns and secondary pollutant formation potentials of dominant greening trees in Chengdu, southwest China"
Author(s):		Liu L; Seyler BC; Liu H; Zhou L; Chen D; Liu S; Yan C; Yang F; Song D; Tan Q; Jia F; Feng C; Wang Q; Li Y;
Address:		"College of Architecture and Environment, Sichuan University, Chengdu 610065, China; College of Science, Sichuan Agricultural University, Ya'an 625014, China. College of Architecture and Environment, Sichuan University, Chengdu 610065, China. Chengdu Academy of Environmental Sciences, Chengdu 610000, China. College of Architecture and Environment, Sichuan University, Chengdu 610065, China. Electronic address: lizhou@scu.edu.cn. Chengdu Ecological and Environmental Monitoring Center, Chengdu 610000, China. Longquanyi Ecology and Environment Bureau, Chengdu 610000, China. College of Science, Sichuan Agricultural University, Ya'an 625014, China"
Journal Title:		J Environ Sci (China)
Year:		2022
Volume:		20220115
Issue:
Page Number:		179 - 193
DOI:		10.1016/j.jes.2021.08.033
ISSN/ISBN:		1001-0742 (Print) 1001-0742 (Linking)
Abstract:		"Integral to the urban ecosystem, greening trees provide many ecological benefits, but the active biogenic volatile organic compounds (BVOCs) they release contribute to the production of ozone and secondary organic aerosols, which harm ambient air quality. It is, therefore, necessary to understand the BVOC emission characteristics of dominant greening tree species and their relative contribution to secondary pollutants in various urban contexts. Consequently, this study utilized a dynamic enclosure system to collect BVOC samples of seven dominant greening tree species in urban Chengdu, Southwest China. Gas chromatography/mass spectrometry was used to analyze the BVOC components and standardized BVOC emission rates of each tree species were then calculated to assess their relative potential to form secondary pollutants. We found obvious differences in the composition of BVOCs emitted by each species. Ficus virens displayed a high isoprene emission rate at 31.472 mugC/(gdw (g dry weight)*hr), while Cinnamomum camphora emitted high volumes of D-Limonene at 93.574 mugC/(gdw*hr). In terms of the BVOC emission rates by leaf area, C. camphora had the highest emission rate of total BVOCs at 13,782.59 mugC/(m(2)*hr), followed by Cedrus deodara with 5466.86 mugC/(m(2)*hr). Ginkgo biloba and Osmanthus fragrans mainly emitted oxygenated VOCs with lower overall emission rates. The high BVOC emitters like F. virens, C. camphora, and Magnolia grandiflora have high potential for significantly contributing to environmental secondary pollutants, so should be cautiously considered for future planting. This study provides important implications for improving urban greening efforts for subtropical Chinese urban contexts, like Chengdu"
Keywords:		*Air Pollutants/analysis China Ecosystem *Environmental Pollutants/analysis Trees *Volatile Organic Compounds/analysis Biogenic volatile organic compounds (BVOCs) Dynamic enclosure system Emission characteristics Secondary pollutants;
Notes:		"MedlineLiu, Liping Seyler, Barnabas C Liu, Hefan Zhou, Li Chen, Dongyang Liu, Song Yan, Chang Yang, Fumo Song, Danlin Tan, Qinwen Jia, Fengju Feng, Cheng Wang, Qiuwei Li, Yunchun eng Netherlands 2022/04/24 J Environ Sci (China). 2022 Apr; 114:179-193. doi: 10.1016/j.jes.2021.08.033. Epub 2022 Jan 15"