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Three-Day Continuous Exposure Monitoring of CNT Manufacturing Workplaces

Title
Three-Day Continuous Exposure Monitoring of CNT Manufacturing Workplaces
Author
안강호
Keywords
CARBON NANOTUBE; AEROSOLS
Issue Date
2015-10
Publisher
HINDAWI PUBLISHING CORPORATION
Citation
BIOMED RESEARCH INTERNATIONAL, v. 2015, Article ID 237140
Abstract
Continuous monitoring for possible exposure to carbon nanotubes was conducted over a period of 2 to 3 days at workplaces that manufacture multiwall carbon nanotubes (MWCNTs) and single wall carbon nanotubes (SWCNTs). To estimate the potential emission of carbon nanotubes (CNTs) and potential exposure of workers, personal sampling, area monitoring, and real-time monitoring using an scanning mobility particle sizer (SMPS) and dust monitor were conducted at workplaces where the workers manufactured CNTs. The personal and area sampling of the total suspended particulate (TSP) at the MWCNT manufacturing facilities ranged from 0.031 to 0.254 and from N.D (not detected) to 0.253 mg/m(3), respectively. This 2- to 3-day monitoring study found that nanoparticles were released when opening the chemical vapor deposit (CVD) reactor door after the synthesis of MWCNTs, when transferring the MWCNTs to containers and during blending and grinding. However, distinguishing the background concentration from the work process particle emission was complicated due to sustained and even increased particle concentrations after the work processes were terminated. The MWCNTs sampled for transmission electron microscopy (TEM) observation exhibited a tangled shape with no individual dispersed CNT structures.
URI
https://www.hindawi.com/journals/bmri/2015/237140/abs/http://hdl.handle.net/20.500.11754/41219
ISSN
2314-6133; 2314-6141
DOI
10.1155/2015/237140
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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