Composition, source, mass closure of PM2:5 aerosols for four forests in eastern China
Li Li , Wu Wang , Jialiang Feng , Dongping Zhang , Huaijian Li , Zeping Gu , Bangjin Wang , Guoying Sheng , Jiamo Fu
DOI:
Received March 01, 2009,Revised August 09, 2009, Accepted , Available online
Volume 22,2010,Pages 405-412
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PM2:5 aerosols were collected in forests along north latitude in boreal-temperate, temperate, subtropical and tropical climatic zones
in eastern China, i.e., Changbai Mountain Nature Reserve (CB), Dongping National Forest Park in Chongming Island (CM), Dinghu
Mountain Nature Reserve (DH), Jianfengling Nature Reserve in Hainan Island (HN). The mass concentrations of PM2:5, organic carbon
(OC), elemental carbon (EC), water soluble organic carbon (WSOC) as well as concentrations of ten inorganic ions (F??, Cl??, NO3??,
SO4
2??, C2O4
2??, NH4
+, Na+, K+, Ca2+, Mg2+) were determined. Aerosol chemical mass closures were achieved. The 24-hr average
concentrations of PM2:5 were 38.8, 89.2, 30.4, 18 g/m3 at CB, CM, DH and HN, respectively. Organic matter and EC accounted for
21%–33% and 1.3%–2.3% of PM2:5 mass, respectively. The sum of three dominant secondary ions (SO4
2??, NO3??, NH4
+) accounted for
44%, 50%, 45% and 16% of local PM2:5 mass at CB, CM, DH and HN, respectively. WSOC comprised 35%–65% of OC. The sources
of PM2:5 include especially important regional anthropogenic pollutions at Chinese forest areas.
