Identification of pcdd/f emission sources in ambient air of southern taiwan

摘要

Several major polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs)emission sources coexisted in southern Taiwan,including municipal solid waste incinerators (MSWIs),medical waste incinerators (MWIs),sinter plants,electric arc furnaces (EAFs),secondary aluminum smelters (secondary ALSs),unleaded gas-fueled vehicles (UGFV)and diesel-fueled vehicles (DFV).Principal component analysis (PCA)and cluster analysis were conducted with the fractions of seventeen 2,3,7,8-congeners in the stack flue gases and ambient air as variables to clarify the influence of these PCDD/Fs emission sources on ambient air.Ambient air in southern Taiwan were sampled and measured for PCDD/Fs.The PCDD/F congener profiles of MSWIs,MWIs,sinter plants,EAFs,and secondary ALSs were chosen from the research of Wang (Wang,2003),while those of UGFV and DFV was chosen from US EPA's database (US EPA,2001).