[Sources Apportionment of Oxygenated Volatile Organic Compounds (OVOCs) in a Typical Southwestern Region in China During Summer]

Mu-Lan Chen; Sai-Nan Wang; Tian-Shu Chen; Bo Zhu; Chao Peng; Jia-Wei Zhou; Han-Xiong Che; Rui-Hui Huang; Fu-Mo Yang; He-Fan Liu; Qin-Wen Tan; Li Han; Jun-Hui Chen; Ke-Ding Lu; Yang Chen

doi:10.13227/j.hjkx.202010101

[Sources Apportionment of Oxygenated Volatile Organic Compounds (OVOCs) in a Typical Southwestern Region in China During Summer]

Huan Jing Ke Xue. 2021 Jun 8;42(6):2648-2658. doi: 10.13227/j.hjkx.202010101.

[Article in Chinese]

Authors

Mu-Lan Chen^{1

2

3}, Sai-Nan Wang^{1

2

3}, Tian-Shu Chen⁴, Bo Zhu⁵, Chao Peng^{1

2}, Jia-Wei Zhou^{1

2}, Han-Xiong Che^{1

2}, Rui-Hui Huang^{1

2}, Fu-Mo Yang⁶, He-Fan Liu⁷, Qin-Wen Tan⁷, Li Han⁸, Jun-Hui Chen⁸, Ke-Ding Lu⁹, Yang Chen^{1

2

3}

Affiliations

¹ Research Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.
² College of Resources and Environment, Chongqing School, University of Chinese Academy of Sciences(UCAS Chongqing), Chongqing 400714, China.
³ College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101400, China.
⁴ Environment Research Institute, Shandong University, Qingdao 266237, China.
⁵ Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
⁶ College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
⁷ Chengdu Institute of Environmental Protection Science, Chengdu 610031, China.
⁸ Sichuan Ecological and Environmental Science Research Department, Chengdu 610041, China.
⁹ College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.

PMID: 34032064
DOI: 10.13227/j.hjkx.202010101

Abstract

Oxygenated volatile organic compounds (OVOCs) are important intermediates in the troposphere and the most important sources of ozone. Proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS) was used to measure VOCs in the Chengdu Plain, Southwestern China. The diurnal variations, photochemical reactivity, O₃ formation potential, and sources were also investigated. The mixing ratios of ten kinds of VOCs (acetaldehyde, acetone, isoprene, Methyl ethyl ketone, Methyl vinyl ketone and Methacrolein, benzene, toluene, styrene, C8 aromatics, and C9 aromatics) were (10.97±4.69)×10^-9. The concentrations of OVOCs, aromatic hydrocarbons, and biogenic VOCs were (8.54±3.44)×10^-9, (1.53±0.93)×10^-9, and (0.90±0.32)×10^-9, respectively. Isoprene, acetaldehyde, and m-xylene were the top three photochemically active species with the greatest O₃ formation potentials. The dominant three OVOCs species (acetaldehyde, acetone, and MEK) were mainly derived from local biogenic sources and anthropogenic secondary sources, and acetone had a strong regional background level, indicating that pollution in this area is significantly affected by regional transmission. This study deepens the understanding of regional O₃ formation mechanisms in southwest China and provides a basis for the scientifically informed control of O₃ pollution.

Keywords: O3 formation potential; oxygenated volatile organic compounds (OVOCs); photochemical age-based parameterization method; proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS); source apportionment.

Publication types

English Abstract