모 조선업 작업장의 공기중 용접흄농도에 관한 조사

A Study on the Concentration of Welding Fume in a Shipbuilding Factory

  • 김광종 (고려대학교 의과대학 예방의학교실 및 환경의학 연구소) ;
  • 송기창 (고려대학교 의과대학 예방의학교실 및 환경의학 연구소)
  • Kim, Kwang-Jong (Department of Preventive Medicine and Institute for Environmental Health, College of Medicine, Korea University) ;
  • Song, Ki-Chang (Department of Preventive Medicine and Institute for Environmental Health, College of Medicine, Korea University)
  • 발행 : 1991.03.31

초록

The present investigation studied the welding fumes produced during the arc welding process at a shipyard. The air at the shipyard was sampled (between February and May, 1990) to determine the total welding fume concentration, its heavy metal content and the concentrations of different sized particles of the welding fumes. The results were as follows : 1. Forty-four out of 50 samples showed welding fume concentrations which exceeding the threshold limit value of $5mg/m^3$. The geometric mean of welding fume concentration was $9.73mg/m^3$ ($2.14-24.86mg/m^3$), and the nighest level was found at the dock assembly shop ($12.0mg/m^3$). 2. The welding fume concentration measured with personal air sampler was 4.2 times greater than that measured with area sampler. 3. Of the heavy metals analyzed, Fe was found to be the most concentrated at $1.29mg/m^3$ ; it constitued 13.3% of the total welding fume concentration. 4. Of the different sized particles that make up the welding fumes, there was a tendency for the smaller particles to be more concentrated. Particles that measured $7{\mu}$ or less in diameter constituted 85.8% of the total welding fume concentration.

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