Study on OC and EC Characteristics of Atmospheric Particulate Matter in Harbin

摘要

In order to investigate the carbon components of atmospheric particles, TSP, PM_(10) and PM_(2.5) were collected and analyzed in July 2008 to June 2010. The results shows that the OC variation of three particles presents of the lower concentration in the middle and the higher on both sides with the highest point in January which is 5 to 7 times of July. The monthly change of concentration was very obvious in PM_(2.5) and OC was mainly from fuel combustion. The monthly variation of EC is not very clear in TSP, PM_(10) and PM_(2.5) with the range of 3.06 ± 1.23μg/m~3, 2.44 ±1.18μg/m~3, 1.55 ± 0.50μg/m~3. EC mainly came from the direct emissions of combustion sources. The concentration of EC was stable in the year. OC / EC is more than 2 in major months, which indicates that secondary chemical reaction has occurred and it is strongest in January and December.