Source Identification of Inhalable Particles in Fog and Haze

In recent years, it draws people´s attention to the high frequency of fog and haze. Shijiazhuang is a city where fog and haze have high frequency. This article takes the inhalant particles of fog and haze in the urban district in Shijiazhuang as the main research target, according to the data of the analyzed chemical elements in particles of fog and haze, four main sources of inhalant particles are identified by adopting two kinds of methods of source identification, Enrichment factors(EF) and Factor Analysis(FA). The EF results showed that in Shijiazhuang, the elements which EF > 10 are mostly Zn, Pb, especially EF of Pb is close to 500, and Enrichment values of Al, K, Cr, Mn, Zn, Pb of the inhalant particles in fog-haze weather are more than in the normal days, especially K, Zn and Pb are more remarkable. The PM10 FA results indicate that K element and Al element of the inhalant particles in fog-haze weather are more than in the normal days. Winter has more than other seasons, and the main sources and contribution rates in fog- haze weather are coal and refuse combustion source 33.65%, soil source and cement/limestone source 33.18%, traffic source 17.486%, and steel source 11.02%, respectively. The main sources of inhalant particles of fog-haze in Shijiazhuang are the coal and refuse combustion dust and soil and cement/limestone construction dust.