Chemical Composition and Sources of Indoor and Outdoor PM10 in Primary Schools

Indoor and outdoor measurements of PM10 (particles Zn > Fe > Ni > Cr > Pb > Cu > Co > Cd and Al > Zn > Fe > Ni > Cr > Cu > Pb > Co > Cd, respectively. The results of EF analysis found to be >1 for most elements studied. Results obtained by PCA-MLR indicate the dominance of earth crust sources (53 %), indoor activities (33 %) and corrosion product (14 %) in indoor PM10. Soil (42 %) was dominant in outdoor PM10 followed by vehicle exhaust (39 %), secondary aerosol (12 %) and construction activities (7 %).