抄録
Suspended particles released from various boilers using different kinds of fuel (crude oil, heavy oil, kerosene, coal, wood and so on) were subjected to multielement analysis by means of instrumental neutron activation method and energy dispersive X-ray fluorescence spectrometry. Elemental concentrations in suspended particles were found to be strongly dependent on the kind of fuel. The analytical results were compared with those obtained formerly on suspended particles released from refuse incineration. Using the measured elemental concentrations in suspended particles released in oil combustion, the contribution of the oil combustion to the elemental concentrations in the urban atmosphere was roughly estimated, assuming that 90 percent of the vanadium in the atmosphere come from oil combustion. According to this estimation, in a particle size range below about 10 micron, the contribution of the oil combustion to the urban atmosphere is quite large for Ni, being as large as for V, and appreciably large for Co (-7%), Cr (-3%) and Na (-2%).
