Observation of nanoaerosol release from a hand dryer
- Observation of nanoaerosol release from a hand dryer
- 배귀남; 박승호; 이승복
- Nanoaerosol; Hand dryer; Release; Nanoproduct
- Issue Date
- Journal of Physics: Conference Series
- VOL 429, 012001-1-012001-4
- Consumer exposure is one of exposures in the life cycle perspective to risk
assessment. Many nanoproducts have been commercialized in the fields of health, electronics,
home, food etc. Hand dryers are widely used at public rest rooms. In this study, we selected the
hand dryer having a filter coated with silver nanoparticles as a popular electronic nanoproduct.
A test chamber system was developed to detect nanoaerosols released from the test
nanoproduct during the operation. The particle number concentration of the chamber
background was confirmed to be <1 particles/㎤ by using a condensation particle counter
with a detection limit of 10 nm. When the hand dryer was turn on for 1 min, the particle
number concentration in the chamber was almost linearly increased up to the peak
concentration (<20 particles/㎤). It was slowly decreased after the hand dryer was turn off.
When the operation was extended to 10 min, similar release pattern of nanoaerosols was
observed. Therefore, it was concluded that the nanoaerosols was emitted from the hand dryer
during the operation. However, the amount of released nanoaerosols was negligible, compared
to indoor nanoaerosol concentration (~10,000 particles/㎤). Also, the released nanoaerosols
could not be analyzed by filter sampling due to small quantity of mass.
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