Abstract for presentation at 14th IUAPPA World Congress

Source Apportionment Study by the CMB-8 and PMF Models for a Coastal Industrial Area

  • Shin'ichi Okamoto, Tokyo University of Information Sciences, Japan
  • Dr Arpa Wangkiat, Rangsit University, Thailand
  • Prapat Pongkiatkul, Asian Institute of Technology, Thailand
  • Chaloemchai Nakkhwan, Asian Institute of Technology, Thailand
  • Dr Nguyen Kim Oanh, Asian Institute of Technology, Thailand

    • Kashima area is faced to the Pacific Ocean, and has one of the largest-size industrial complexes in Japan. Particulate matter (PM) air pollution in this area is characterized by high contribution of sea salt. Our previous study could clarify the behavior of secondary particles; sulfate in summer and chloride and nitrate in winter for this area. It may be related with the gas phase and particle phase exchange due to the ambient temperature. And also gas-phase nitric acid was reacted with sodium chloride of sea salt in summer, because the apparent decreasing tendency of the molar ratio of Cl-/Na with the distance from the coastline could be seen in summer season.
    The positive matrix factorization (PMF) and the chemical mass balance (CMB-8) models were applied to the source apportionment of ambient PM study for this area. The PMF result for coarse fraction was similar to that of CMB-8 model. The PMF could identify six source categories. As for coarse fraction, correlation coefficients for the calculated contributions by PMF and CMB-8 models for individual samples were larger than 0.6 for the source categories of sea salt, soil and steel mill
    As for the fine fraction, the PMF could also identify the following emission sources; steel mill, soil, Cl and NO3 rich secondary particle, aged sea salt, SO4 rich secondary particle, and waste burning. However the CMB-8 result for fine fraction is not satisfactory due to higher ratio of secondary particles.

    Conference Organiser - ICMS Pty Ltd