Particle size distributions of oil mists in workplace atmospheres and their exposure concentrations to workers in a fastener manufacturing industry

被引:47
作者
Chen, Mei-Ru
Tsai, Perng-Jy
Chang, Chih-Ching
Shih, Tung-Sheng
Lee, Wen-Jhy
Liao, Pao-Chi
机构
[1] Natl Cheng Kung Univ, Coll Med, Dept Environm & Occupat Hlth, Tainan 70428, Taiwan
[2] Natl Chung Cheng Univ, Sustainable Environm Res Ctr, Tainan 70101, Taiwan
[3] Natl Chung Cheng Univ, Dept Environm Engn, Tainan 70101, Taiwan
[4] Inst Occupat Safety & Hlth, Council Labor Affairs, Taipei, Taiwan
关键词
fastener manufacturing industry; oil mist; particle size distribution; exposure assessment; workplace atmosphere;
D O I
10.1016/j.jhazmat.2006.12.036
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study was set out to characterize size distributions of oil mists in three workplace atmospheres of the forming, threading, and heat treatment in a fastener manufacturing industry and to assess their exposures to workers. Particle size segregating samplings were conducted on the workplace atmospheres of the three selected industrial processes by using the modified Marple 8-stage cascade impactor (m-Marple). We found that mass median aerodynamic diameter (MMAD) of the fine mode and coarse mode fell to the range 0.309-0.501 mu m and 8.16-13.0 mu m, respectively. The fractions of inhaled particles exposed to different regions of the respiratory tracts found that the alveolar region was consistently higher than both head and tracheobronchial regions in all three studied exposure groups. Personal inhalable oil mist samplings were conducted on workers in the three selected processes revealed their exposure levels as: threading workers (2.11 mg/m(3)) > forming workers (1.58 mg/ml(3)) > heat treatment workers (0.0801 mg/m(3)). The estimated respirable exposure concentrations for both forming and threading workers (1.34 mg/m(3) and 1.40 mg/m(3), respectively) were higher than the level known for "increased risk of pulmonary injury" (0.20 mg/m(3)) suggesting that appropriate control measures should be taken to reduce their exposures to the oil mists of the respirable fraction immediately. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:393 / 398
页数:6
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