Measurements of ultrafine particle concentrations and size distribution in an iron foundry

Yu Hsiang Cheng*, Yen Chi Chao, Cheng Han Wu, Chuen-Tinn Tsai, Shi Nian Uang, Tung Sheng Shih

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


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 × 104 to 2.82 × 105 particles cm-3 and 67.56 to 2.13 × 103 μm2 cm-3, 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.

Original languageEnglish
Pages (from-to)124-130
Number of pages7
JournalJournal of Hazardous Materials
Issue number1
StatePublished - 1 Oct 2008


  • Iron foundry
  • Number concentration
  • Scanning mobility particle sizer
  • Surface area concentration
  • Ultrafine particles

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