Particle emissions from laboratory activities involving carbon nanotubes
| Autor: | Michael J. Ellenbecker, Candace Su-Jung Tsai, Li-Ming Lo, Kevin H. Dunn, Jennifer L. Topmiller, William A. Heitbrink |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Sonication chemistry.chemical_element Bioengineering 02 engineering and technology Carbon nanotube 010501 environmental sciences engineering.material 01 natural sciences Article Nanomaterials law.invention Suspension (chemistry) Coating law General Materials Science Filtration 0105 earth and related environmental sciences General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics chemistry Glovebox Modeling and Simulation Environmental chemistry engineering 0210 nano-technology Carbon |
| Zdroj: | Journal of Nanoparticle Research. 19 |
| ISSN: | 1572-896X 1388-0764 |
| DOI: | 10.1007/s11051-017-3990-8 |
| Popis: | This site study was conducted in a chemical laboratory to evaluate nanomaterial emissions from 20–30-nm-diameter bundles of single-walled carbon nanotubes (CNTs) during product development activities. Direct-reading instruments were used to monitor the tasks in real time, and airborne particles were collected using various methods to characterize released nanomaterials using electron microscopy and elemental carbon (EC) analyses. CNT clusters and a few high-aspect-ratio particles were identified as being released from some activities. The EC concentration (0.87 μg/m3) at the source of probe sonication was found to be higher than other activities including weighing, mixing, centrifugation, coating, and cutting. Various sampling methods all indicated different levels of CNTs from the activities; however, the sonication process was found to release the highest amounts of CNTs. It can be cautiously concluded that the task of probe sonication possibly released nanomaterials into the laboratory and posed a risk of surface contamination. Based on these results, the sonication of CNT suspension should be covered or conducted inside a ventilated enclosure with proper filtration or a glovebox to minimize the potential of exposure. |
| Databáze: | OpenAIRE |
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