In the past, most research only focused the sampling of PM (Particulate Matter) from incinerator stack and investigated the chemical species of dioxins, acid gases and heavy metals. However very few informations were related to the chemical compositions of PM10 and PM2.5 from stack emissions. Therefore, in this study, PM10 and PM2.5 samples emitted from two incinerators in central Taiwan were collected and further analyzed for carbonaceous compounds (EC, OC), water-soluble ions (Cl-, NO3-, SO42-, Na+, NH4+, K+, Mg2+, Ca2+) and trace metal elements ( Al, Fe, Ca, Mg, K, Zn, Cr, Ni, Pb, Ti, Mn, Cu, Sb, Mo, Ba, Cd, As, Se, Co, and V). The purpose of these works were to establish the source profiles of PM10 and PM2.5 emitted from municipal solid waste incinerator.
The results showed that EC, OC, Cl-, SO42-, Na+, K+, Ca2+, Fe, Ca, K and Zn were the major chemical components (abundance greater than 1 %) in PM10 and PM2.5. Higher Ca concentration was found in PM10 and PM2.5 due to the injection of lime spray to remove acid gas in semi-dry scrubber. In this study, the concentrations of the emitted particulate matter and heavy metal concentrations were lower than the domestic and international regulations and standards. The emission factors were also lower than those in the literatures. These results indicated that the air pollution control devices of the incinerators had effectively removed the pollutants. In addition, the concentration of the emitted Cr concentration was higher than that from the Beitou incinerator, which indicated that the treated waste in this area might contain more Cr than those in the other area.