Abstract
The Industrial Pollution Control Association of Japan (IPCAJ) has carried out a 3-year study in order to promote an understanding of the behavior of suspended particulate matter, to identify the contributing sources and to estimate their contributions. In this study many monitoring stations were set up around the Kashima industrial area. Atmospheric aerosols were collected for 2 weeks in each of the four seasons of 1983. The chemical compositions of the aerosols were analysed by instrumental neutron activation analysis and so on. The results of the study showed that soil particles comprise the highest component, while sulfate and other secondary particles are higher in the spring ans summer. In the spring and fall when sea breezes are dominant, sea salt has been found to have a higher concentration, especially at sites near the shore. Following the above-mentioned information a source apportionment study was conducted using the chemical mass balance method. Results have shown that the contributions of soil and sea salt are greater than the contributions from industrial sources for the Kashima area.
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