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High loadings and source strengths of organic aerosols in China
Author(s) -
Wang Gehui,
Kawamura Kimitaka,
Watanabe Tomomi,
Lee Shuncheng,
Ho Kinfai,
Cao Junji
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl027624
Subject(s) - combustion , environmental chemistry , fossil fuel , environmental science , biomass (ecology) , total organic carbon , pollutant , wax , biomass burning , carbon fibers , aerosol , chemistry , materials science , geology , organic chemistry , oceanography , composite number , composite material
Nation‐wide studies of organic aerosols were conducted on a molecular level in 15 Chinese cities. The results showed strikingly high levels of organic compounds (e.g., annual concentrations of polycyclic aromatic hydrocarbons, phthalates, sugars and diacids are 110, 370, 400 and 830 ng m −3 , respectively), especially in the mid‐west region during winter (up to 125 μ g m −3 organic carbon). Fossil fuel combustion and/or biomass burning products are 3−30 times more abundant in winter than in summer. In contrast, significant quantity of phthalates (168−2200 ng m −3 ) was detected in summer. Concentrations of the pollutants are generally 1−3 orders of magnitude higher than those in developed countries. Their source strengths are characterized in winter by fossil fuel combustion, followed by secondary oxidation, plant wax emissions and biomass burning, whereas in summer by secondary oxidation, followed by fossil fuel combustion and plastic emissions.