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Choi, Sung-Deuk
Environmental Analytical Chemistry Lab (EACL)
Research Interests
  • Persistent organic pollutants, Environmental Analysis and monitoring, Multimedia modeling, Fine particle

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Spatial-temporal Characteristics and Source Apportionment of Ambient VOCs in Southeast Mountain Area of China

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Title
Spatial-temporal Characteristics and Source Apportionment of Ambient VOCs in Southeast Mountain Area of China
Author
Ji, XiaotingXu, KeLiao, DanChen, GaojieLiu, TaotaoHong, YouweiDong, SijunChoi, Sung-DeukChen, Jinsheng
Issue Date
2022-05
Publisher
TAIWAN ASSOC AEROSOL RES-TAAR
Citation
AEROSOL AND AIR QUALITY RESEARCH, v.22, no.5, pp.220016
Abstract
Seasonal variations and sources of ambient volatile organic compounds (VOCs) were conducted at the county and rural sites in a mountain area of southeastern China. The results showed that the pattern of VOC concentrations was dominated by oxygenated VOCs (37.6%) and alkanes (25.8%), followed by halocarbons (16.8%), alkenes (11.9%), aromatics (6.87%), and alkynes (1.04%). Based on the OH radical loss rate (LOH) and ozone formation potential (OFP) analysis, alkenes had the highest chemical activity, especially the contribution of isoprene in rural areas. Aromatics contributed the most to secondary organic aerosols (SOA) formation in both county and rural areas. Source apportionment of VOCs were quantified by the positive matrix factorization (PMF) model, including industrial emissions and combustion burning (30.1% and 43.3% in the county and rural areas, respectively) and vehicle exhausts (30.3% and 10.8%), followed by solvent usage (17.1% and 5.2%), liquid petroleum gas (LPG) usage and fuel evaporation (14.2% and 10.0%), and biogenic source (8.3% and 30.6%). The backward air trajectories showed that air mass in spring was mainly originated from the intercity transmission, while the air clusters in autumn came from the northern areas through long-range transport. The study was helpful to understand the pollution characteristics in the mountainous area and provides a scientific basis for local O3 and PM2.5 pollution control.
URI
https://scholarworks.unist.ac.kr/handle/201301/58429
URL
https://aaqr.org/articles/aaqr-22-01-oa-0016
DOI
10.4209/aaqr.220016
ISSN
1680-8584
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UEE_Journal Papers
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