EVALUATION OF SOURCE APPORTIONMENT TO SUSPENDED PARTICULATE MATTER INAIR SAMPLES COLLECTED FROM KOBE AREA BY CHEMICAL MASS-BALANCE METHOD

Suspended particulate matter (SPM) levels in air samples collected wit h a high-volume air sampler from the Kobe area in Japan were measured. Furthermore, the evaluation of the source apportionment to SPM was in vestigated by the chemical mass balance (CMB) method based on nine ele ments, i.e., Ca, K, Na, Fe, Mn, Al, Ni, Zn and V, as an index element. The sum of the percent contributions to SPM from six main sources (so il, marine, fuel oil combustion, iron-and-steel industry, refuse incin eration, cement particles) was calculated to be about 25%. Among these sources, fuel oil combustion showed the largest contribution.