Pollution Property and Affecting Factors of PM10 in the Air near the Road in Harbin

Pollution property of particulates in the air and its affecting factors at the traffic crossing in Harbin were studied. PM₁₀ in atmosphere was sampled in August 2005 near the roads of Harbin, the ions, heavy metals and carbon ingredients of PM₁₀ were analyzed. The results showed that the proportion of the samples which didn´t meet the national standard was 75%. The concentrations of SO₄ ^2-, NH₄ ⁺, Ca₂ ⁺ were higher, their main pollution source came from traffic dust. The EF of Cr, Zn and Pb was far greater than 10, so they mainly came from man-made pollution and that of Ca, Al, Mn and Fe was close to 1, so they mainly came from the soil and other natural source. EC/TC > 0.36 indicted carbonaceous contents mainly came from primary particulate pollution emissions, such as motor vehicles.