Articles online

Distribution of Nanoparticle Number Concentrations at a Nano-TiO2 Plant

Category: Articles

Volume: 12 | Issue: 5 | Pages: 934-940
DOI: 10.4209/aaqr.2012.02.0047
PDF | RIS | BibTeX

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


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.


Aerosol nanoparticles Aerosol control technology Workshop Number concentration Titanium dioxide

Related Article

Design and Characterization of an Inhalation System to Expose Rodents to Nanoaerosols

Frédéric Cosnier, Sébastien Bau , Stéphane Grossmann, Hervé Nunge, Céline Brochard, Stéphane Viton, Raphaël Payet, Olivier Witschger, Laurent Gaté
Volume: 16 | Issue: 12 | Pages: 2989-3000
DOI: 10.4209/aaqr.2016.01.0034

Critical Emissions from the Largest On-Road Transport Network in South Asia

Saroj Kumar Sahu , Gufran Beig, Neha Parkhi
Volume: 14 | Issue: 1 | Pages: 135-144
DOI: 10.4209/aaqr.2013.04.0137

Ambient Air Quality during Diwali Festival over Kolkata – A Mega-City in India

A. Chatterjee , C. Sarkar, A. Adak, U. Mukherjee, S.K. Ghosh, S. Raha
Volume: 13 | Issue: 3 | Pages: 1133-1144
DOI: 10.4209/aaqr.2012.03.0062