Size distributions and exposure concentrations of nanoparticles associated with the emissions of oil mists from fastener manufacturing processes

作者：Wang Ying Fang; Tsai Perng Jy^*; Chen Chun Wan; Chen Da Ren; Dai Yu Tung

来源：Journal of Hazardous Materials, 2011, 198: 182-187.

DOI：10.1016/j.jhazmat.2011.10.028

• Nanoparticle
• Exposure assessment
• Lung deposition
• Modified electrical aerosol detector
• Oil mist

The aims of the present study were set out to measure size distributions and estimate workers' exposure concentrations of oil mist nanoparticles in three selected workplaces of the forming, threading, and heat treating areas in a fastener manufacturing plant by using a modified electrical aerosol detector (MEAD). The results were further compared with those simultaneously obtained from a nanoparticle surface area monitor (NSAM) and a scanning mobility particle sizer (SMPS) for the validation purpose. Results show that oil mist nanoparticles in the three selected process areas were formed mainly through the evaporation and condensation processes. The measured size distributions of nanoparticles were consistently in the form of uni-modal. The estimated fraction of nanoparticles deposited on the alveolar (AV) region was consistently much higher than that on the head airway (HD) and tracheobronchial (TB) regions in both number and surface area concentration bases. However, a significant difference was found in the estimated fraction of nanoparticles deposited on each individual region while different exposure metrics were used. Comparable results were found between results obtained from both NSAM and MEAD. After normalization, no significant difference can be found between the results obtained from SMPS and MEAD. It is concluded that the obtained MEAD results are suitable for assessing oil mist nanoparticle exposures.

• 出版日期2011-12-30
• 单位中国医科大学