Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
582854 | Journal of Hazardous Materials | 2008 | 7 Pages |
Abstract
The number and surface area concentration of ultrafine particles in an iron foundry is of interest as freshly generated ultrafine particles are produced by metal melting, pouring and molding processes. This study measured the number and surface area concentrations of ultrafine particles and their size distributions in an iron foundry using a scanning mobility particle sizer (SMPS). The 10-100 nm ultafine particle number concentrations (NC0.01-0.1) and surface area concentrations (SC0.01-0.1) measured at the iron foundry were 2.07 Ã 104 to 2.82 Ã 105 particles cmâ3 and 67.56 to 2.13 Ã 103 μm2 cmâ3, respectively. The concentrations changed dramatically depending on on-site manufacturing conditions. The NC0.01-0.1 levels in the iron foundry were approximately 4.5 times higher on average compared with those in the outdoor ambient environment. These measurement results indicate that the presence of extra particles in the workplace air is within the ultrafine range. Additionally, the analytical results suggest that the number mode diameter can be used to estimate the SC0.01-0.1 levels using the NC0.01-0.1 levels. Moreover, the ultrafine particle number mode diameter was found to be about 46.1 nm in the iron foundry.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Yu-Hsiang Cheng, Yen-Chi Chao, Cheng-Han Wu, Chuen-Jinn Tsai, Shi-Nian Uang, Tung-Sheng Shih,