| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Research Abstract |
Semivolatile organic compounds (SVOCs) such as di(2-ethylhexyl) phthalate (DEHP) have caused not only chemical sensitivity but also asthma. SVOCs in indoor air exist in the form of a single molecule (gaseous phase) and adsorbate on airborne dusts (particulate phase) because of their low vapor pressures. However, their partitioning method was not well-established. This study attempted to quantify the partitioning of DEHP in gaseous and particulate phases using a diffusion tube by generating airborne Kanto loam dusts with an ultrasonic atomizer. As a result, it was suggested that DEHP vapor could be adsorbed on the surface of airborne Kanto loam dusts in the manner of Langmuir-type adsorption isotherm under the specific conditions.
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