Characteristics and Sources of Water-Soluble Ions in PM2.5 in the Sichuan Basin, China
To track the particulate pollution in Sichuan Basin, sample filters were collected in three urban sites.Characteristics of water-soluble inorganic ions (WSIIs) were explored and their sources were analyzed by principal component analysis (PCA).During 2012⁻2013, the PM2.5 concentrations were 86.7 ± 49.7 μg m−3 in Chengdu (CD),