Development of large quantity classifying dust sampler and emission control technology for air pollutants
Chikao Kanaoka, Dr. Eng., Professor |
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To elucidate the changes of environment in Pan-Japan Sea area, precise monitoring of transported materials affecting the environment like polycyclic aromatic hydrocarbon, water- soluble ion (SO42-, NO3-, etc.), heavy metal components and so on at different locations and time are unavoidable. Those materials are usually transported not as individual substance but as the state of attaching on or reacted with suspended particulate matter.
There are variety of affecting materials and their particle size ranges very wide so that to obtain the accurate analysis, large amount of classified air sample is required.
In this research, a classifying atmospheric aerosol sampler (Fig. 1) capable of sampling large quantities in a short sampling period will be developed. Then environment in Pan-Japan Sea area is planed to study by using the developed sampler.
Effective control technology for the suppression of the generation of DXN accompanying the thermal treatment of waste materials will be developed. In this study, the following scheme will be adopted, i.e., 1. complete combustion of waste materials, 2. potential catalysts of heavy metals such as Cu, Zn and etc. will be removed at higher temperature than re-synthesis temperature of DXN, 3. rapid cooling of flue gas. They will be done based on the equilibrium and chemical consideration of heavy metals at elevated temperature.
