Monthly Variation Of N-Alkanes Concentration In Pm2.5 Of The Anmyeon Island

The n-alkanes which are stable compounds in the atmosphere are emitted by anthropogenic sources and biological sources. The goal of this study is to understand characteristics of n-alkane distributions in PM2.5 of the Anmyeon Island which is one of background site in Korea. The concentration of n-alkanes in PM2.5 was measured at Anmyeon Island for one year from June 2015 to May 2016. The average concentration of total n-alkanes (Sigma n-alkanes) from C20 to C34 was 14.02 +/- 10.26 ng m(-3) and ranged from 1.77 to 47.65 ng m(3). Various diagnostic parameters were used to identify the source. As a result, it is considered that Anmyeon Island had a large influence of biological sources during non-heating period, while the influence of anthropogenic emission during the heating period was significant. Principle Component Analysis (PCA) was performed and yielded three components that accounted for 93.6% of the total variance in n-alkanes. Factor 1, which accounted for 42.3% of the total variance, indicated anthropogenic source including fossil fuel and biomass combustion, while, Factor 3 was interpreted as the biological sources such as plant wax.