Yi Yang , Ping Mao, Zheng-Ping Wang, Jin-Hua Zhang

  • School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Received: February 28, 2012
Revised: April 28, 2012
Accepted: April 28, 2012
Download Citation: ||https://doi.org/10.4209/aaqr.2012.02.0047  

  • Download: PDF

Cite this article:
Yang, Y., Mao, P., Wang, Z.P. and Zhang, J.H. (2012). Distribution of Nanoparticle Number Concentrations at a Nano-TiO2 Plant. Aerosol Air Qual. Res. 12: 934-940. https://doi.org/10.4209/aaqr.2012.02.0047



Nanoparticle number concentration distributions were measured at various sites in a plant manufacturing nano-sized titanium dioxide powder. It was found that aerosol nanoparticles suspended in the air were mainly in the form of agglomerated particles, and had the average diameters of 124.2 nm and 524.4 nm, respectively. The number concentration of aerosol particles increased with source height, but decreased with distance from the source. The concentration was highly affected by the dispersive forces of the discharging port, and the suspension and the agglomeration of particles. The aerosol particles accumulated after a long working time, and the concentration was reduced at large suspending distances. In contrast, the concentration of primary particles was higher for a working time of less than 2 hours, and returned to normal levels after 3 hours, due to the accumulation and agglomeration effects experienced by the primary particles. Motivated by these findings, an aerosol enclosure was developed in this study, and it showed excellent control over the distribution of aerosol particles, including the agglomerated and primary particles. This is thus a promising approach to achieve effective and efficient personal protection in the workspace.

Keywords: Number concentration; Titanium dioxide; Aerosol nanoparticles; Aerosol control technology; Workshop

Don't forget to share this article 


Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

Latest coronavirus research from Aerosol and Air Quality Research

2018 Impact Factor: 2.735

5-Year Impact Factor: 2.827

SCImago Journal & Country Rank

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal, promotes submissions of high-quality research, and strives to be one of the leading aerosol and air quality open-access journals in the world.