Pollution Characteristics and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Aerosol from North Suburb of Nanjing
Miao Runfeng
Lu Xia
Abstract：Using the aerosol samples taken in August 2010 in the north suburb of Nanjing,the contents and distribution characteristics of 16 kinds of polycyclic aromatic hydrocarbons (PAHs) were analyzed using gas chromatography with mass selective detection (GC-MS).Principal component analysis and characteristic ratio method were used to analyze the PAHs,and the four major sources were identified:vehicle emissions,coal combustion,natural gas combustion and plant combustion.The contributions from the four major sources were measured in further quantitative calculation with absolutely principal component analysis.The results were as follows.1) The average concentration of all the PAHs was 135.85 ng/m3 and PAHs with 4 rings were the main components,which accounted for 88.7％.2)The particle size distribution was dual-modes with one peak at the range of 9-10 μm and the other peak at the range of 0.65-1.10 μm.3) The natural gas combustion contributed 5.7％-44.1％ of various PAHs,coal combustion 20.7％-57.8％,vehicle emissions 4.6％-46.7％,plant combustion 2.9％-38.1％.The local vehicle emissions and fuel combustion were the main sources of PAHs in PM,0,long-range transport also had an important contribution to PAHs in north suburban area of Nanjing.
Keywords：aerosolpolycyclic aromatic hydrocarbons(PAHs)size distributionsource apportionment
Publication Date：2017-04-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 78-83 )