Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Control and Investigation for Hazardous Characteristics of Metalworking Fluids Used in Korea - Control and Hazardous Characteristics of Soluble MWF

우리나라에서 사용하는 광물유(금속가공유)의 유해특성과 관리대책에 관한 연구 -수용성 금속가공유의 유해특성과 관리대책-

  • Paik, Nam-won (Seoul National University, School of Public Health) ;
  • Park, Dong-wook (Korea National Open University, Department of Environmental Health) ;
  • Yoon, Chung-sik (Seoul National University, School of Public Health) ;
  • Kim, Seung-won (Seoul National University, School of Public Health) ;
  • Kim, Shin-bum (Seoul National University, School of Public Health) ;
  • Kim, Kwi-suk (Seoul National University, School of Public Health)
  • Published : 1998.05.29
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Abstract

The objectives of this study were both to evaluate the level and correlations of hazardous agents and to suggest measures to control industrial hygiene problems caused by using water-soluble metalworking f1uids(MWF). Geometric mean of formaldehyde(0.039 ppm) was higher than criteria of NIOSH(0.016ppm). Formaldehyde, originally existed in the biocide, is released and used to kill microbes in soluble MWF. Microbe concentrations were above $10^4No./mL$ in 14 MWF tanks among 20 tanks surveyed. Nitrosamines that is formed by reaction of nitrosating group and amines was detected to $18.4-47.1{\mu}g/m^3$. Formaldehyde concentration was low when microbes were abundant(r=-0.67, p=0.011), and high when open tank area was wide(r=0.75. p=0.012). The significant relationship between pH and microbes(r=-0.76. p=0.003) was also observed. The predominant bacteria species in MWF were Pseudomonas spp., Bacillus spp., Comamonas testosteroni, Acinetobacter haemolyticus, Bordertella bronchiseptica in order. Therefore, hazardous agents emitted by using water-soluble MWF seems to be correlated microbial growth. In order to minimize worker's exposure to several hazardous agents by an water-soluble MWF and to increase productivity, microbial growth must be controlled to the lowest level as possible. Administrative control as well as engineering control must comprehensively be applied to control microbe's growth in water-soluble MWF.

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