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- Title
Stable Carbon Isotope Characteristics and Source Apportionment of PM2.5 in Winter and Summer in Qingdao.
- Authors
WANG Yao; XIAO Hongwei; TAO Jihua; XIAO Yangning; MA Yan; LI Zhitao; XIAO Huayun
- Abstract
In order to determine the source and contribution of total carbon (TC) in PM2.5 in winter and summer in Qingdao, PM2.5 samples were collected from January 1 to February 28, 2018 (winter) and July 1 to August 31, 2018 (summer). The concentration of TC, the composition of water-soluble ions, and alongside the composition of stable carbon isotope (δ13CTC) were measured, also the Bayesian mixture model was used to calculate the contribution of δ13CTC from different sources. The TC concentrations in winter and summer were (8.6±3.9) μg/m3, (3.9±2.5) μg/m3. δ13CTC values were (-24.8‰±1.0‰) and (-26.5‰±0.9‰), respectively. The results suggest that an obvious seasonal changes. Combined with of meteorological data, water-soluble ions and backward trajectory analysis, the TC concentrations were affected by meteorological conditions and source changes. Besides, according to the Bayesian mixture model, TC in winter mainly comes from motor vehicle exhaust and coal combustion, which contributed 63.1% and 20.7% respectively to the TC pool. Summer TC was mainly impacted by motor vehicle exhaust and C3 plant combustion, which accounted for 63% and 33.8% of TC pool. The main source of TC may be affected by motor vehicle ownership and freight transportation in Qingdao Port, and secondly by coal burning in winter and C3 plant burning in summer.
- Subjects
QINGDAO (China); PARTICULATE matter; CARBON isotopes; STABLE isotopes; CARBONACEOUS aerosols; COAL combustion; FREIGHT &; freightage; SUMMER
- Publication
Environmental Science & Technology (10036504), 2023, Vol 46, Issue 6, p118
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0189.23.338