Fusion Technology Research Institute, Hoseo University, Chungnam, Korea.
Inhal Toxicol. 2010 Apr;22(5):369-81. doi: 10.3109/08958370903367359.
Seven CNT (carbon nanotube) handling workplaces were investigated for exposure assessment. Personal sampling, area sampling, and real-time monitoring using an SMPS (scanning mobility particle sizer), dust monitor, and aethalometer were performed to characterize the mass exposure, particle size distribution, and particle number exposure. No workplace was found to exceed the current ACGIH (American Conference of Governmental Industrial Hygienists) TLVs (threshold limit values) and OELs (occupational exposure levels) set by the Korean Ministry of Labor for carbon black (3.5 mg/m(3)), PNOS (particles not otherwise specified; 3 mg/m(3)), and asbestos (0.1 fiber/cc). Nanoparticles and fine particles were most frequently released after opening the CVD (chemical vapor deposition) cover, followed by catalyst preparation. Other work processes that prompted nanoparticle release included spraying, CNT preparation, ultrasonic dispersion, wafer heating, and opening the water bath cover. All these operation processes could be effectively controlled with the implementation of exposure mitigation, such as engineering control, except at one workplace where only natural ventilation was used.
对 7 个 CNT（碳纳米管）处理工作场所进行了暴露评估调查。通过个人采样、区域采样以及使用 SMPS（扫描迁移率颗粒尺寸分析仪）、粉尘监测仪和黑碳仪进行实时监测，对质量暴露、粒径分布和颗粒数暴露进行了表征。没有发现任何工作场所超过了当前由韩国劳动部为碳黑（3.5 毫克/立方米）、PNOS（未指定颗粒；3 毫克/立方米）和石棉（0.1 纤维/立方厘米）设定的美国政府工业卫生学家会议（ACGIH）TLVs（阈限值）和 OELs（职业接触限值）。在打开 CVD（化学气相沉积）盖后，最常释放纳米颗粒和细颗粒，其次是催化剂制备。其他引发纳米颗粒释放的工作过程包括喷涂、CNT 制备、超声分散、晶圆加热和打开水浴盖。除了一个只使用自然通风的工作场所外，所有这些操作过程都可以通过实施工程控制等暴露缓解措施有效地控制。
