Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\21976308
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Ann+Occup+Hyg
2011 ; 55
(9
): 1037-47
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Exposure and emissions monitoring during carbon nanofiber production--Part II:
polycyclic aromatic hydrocarbons
#MMPMID21976308
Birch ME
Ann Occup Hyg
2011[Nov]; 55
(9
): 1037-47
PMID21976308
show ga
Production of carbon nanofibers and nanotubes (CNFs/CNTs) and their composite
products is increasing globally. High-volume production may increase the exposure
risks for workers who handle these materials. Though health effects data for
CNFs/CNTs are limited, some studies raise serious health concerns. Given the
uncertainty about their potential hazards, there is an immediate need for
toxicity data and field studies to assess exposure to CNFs/CNTs. An extensive
study was conducted at a facility that manufactures and processes CNFs. Filter,
sorbent, cascade impactor, bulk, and microscopy samples, combined with
direct-reading instruments, provided complementary information on air
contaminants. Samples were analyzed for organic and elemental carbon (OC and EC),
metals, and polycyclic aromatic hydrocarbons (PAHs), with EC as a measure of
CNFs. Transmission electron microscopy with energy-dispersive X-ray spectroscopy
also was applied. Fine/ultrafine iron-rich soot, PAHs, and carbon monoxide were
production byproducts. Direct-reading instrument results were reported previously
[Evans DE et al. (Aerosol monitoring during carbon nanofiber production: mobile
direct-reading sampling. Ann Occup Hyg 2010; 54:514-31)]. Results for
time-integrated samples are reported as companion papers in this issue. OC and
EC, metals, and microscopy results are reported in Part I [Birch ME et al.
(Exposure and emissions monitoring during carbon nanofiber production-Part I:
elemental carbon and iron-soot aerosols. Ann Occup Hyg 2011; 55: 1016-36.)]
whereas results for PAHs are reported here. Naphthalene and acenaphthylene were
the dominant PAHs with average concentrations ranging from 115 to 336 ?g m(-3)
and 35 to 84 ?g m(-3), respectively. Concentrations of other PAHs ranged from ?1
to 10 ?g m(-3).