A Study on the Total, Particle Size-Selective Mass Concentration of Airborne Manganese, and Blood Manganese Concentration of Welders in a Shipbuilding Yard

조선업 용접작업자의 공기 중 총 망간 및 입경별 망간 농도와 혈중 망간농도에 관한 연구

  • Received : 2015.11.16
  • Accepted : 2015.12.05
  • Published : 2015.12.31


Objectives: Welding is a major task in shipbuilding yards that generates welding fumes. A significant amount of welding in shipbuilding yards is done on steel. Inevitably, manganese is present in the base metals being joined and the filler wire being used and, consequently, in the fumes to which workers are exposed. The objective of this work was to characterize manganese exposure associated with work area, total and particle size-selective mass concentration, and compare the mass concentrations obtained using a three-piece cassette sampler, size-selective impactor sampler and blood manganese concentrations. Materials: All samples were collected from the main work areas at one shipbuilding yard. We used a three piece cassette sampler and the eight stage cascade impactor sampler for the airborne manganese mass concentration of total and all size fractions, respectively. In addition, we used the results of health examination of workers sampled for airborne manganese. Results: The oder of high concentration of airborne manganese in shipbuilding processes was as follows; block assembly, block erection, outfitting installation, steel cutting, and outfitting preparation. The percentages of samples that exceeded the OES of the ministry of employment and labor by the cassette sampling method was 12.5%, however 59.1% of sampled workers by the impactor sampling method exceeded the TLV of the ACGIH. Conclusions: Even though the manganese concentrations in blood of workers exposed to higher airborne manganese concentration were higher than among those exposed to lower concentrations, there was no difference in blood manganese concentrations among work duration. The data analyzed here by characterizing size-selective mass concentrations indicates that the inhaled manganese of welders in shipbuilding yards could be mostly manganese-containing respirable particle sizes.


manganese;shipbuilding yard;welding fume


  1. ACGIH. TLVs and BEIs based on the documentation of the threshold limit values and biological exposure indices. Cincinnati, Ohio: ACGIH; 2011.
  2. Baldwin M, Mergler D, Larribe F, Belanger S, Tardif R, Bilodeau L, Hudnell K. Bioindicator and exposure data for a population based study of manganese. Neurotoxicology 1999;20:343-354
  3. Byeon SH, Park SH Kim CI, Park JJ, Yang JS, et al.. A study on the airborne concentration of welding fume for some manufacturing industries. Korean Ind Hyg Assoc J 1995;5(2):172-183
  4. Chandra SV, Shukla GS, Saxena DK. Manganese-induced behavior dysfunction and its neurochemical mechanism in growing mice. J neurochem 1979; 33(6):1217-1221
  5. Choi HC, Kim KY, An SH, Hyun DW. Manganese concentration in blood and urine of manganese exposed welding workers. Korean J Occup Environ Med 1998;10(4):534-547
  6. Hinds WC. Data analysis. In: Lodge JP, Chan TL (eds.). Cascade impactor sampling and data analysis. Akron, Ohio: American Industrial Hygiene Association; 1986.
  7. Hong YS, Lim MA, Lee YH, Cheong HK, Kim JY, et al.. Three cases of high signal intensity by brain magnetic resonance imaging in $CO_2$ arc welders. Korean J Occup Environ Med 1998;10(2):290-298
  8. Kim DG, Moon DH, Lee CK, Park MH, Ham SA, et a.. A study on exposure level of noise, manganese, and welding hume to welders in small size industry. Inje Med 2002;23(5):557-566
  9. Kim JY, Lim HS, Cheong HK, Paik NW. A study on the manganese exposure and health hazards among manganese manufacturing workers. The Kor J of Occup Med 1994;6(1):98-112
  10. Kim KS, Kim YH, Jin YW, Kim EA, Yang JS, et al.. Factors associated with psychoneurobehaviral outcomes in workers exposed to manganese. Korean J Occup Environ Med 1999;11(2):213-228
  11. Kim YH, Kim KS, Yang JS, Park IJ, Kim E, et al.. Increase in signal intensities on T1-weighted magnetic resonance images in asymptomatic manganeseexposed workers. Neuro Toxicology 1999;20:901-908
  12. Klaassen CD. Biliary excretion of manganese in rats, rabbits, and dogs. Toxicol Appl Pharmacol 1974; 29:458-468
  13. Lee YS, Yoon CG, Park JA, Lee SK, Chae JH, et al.. Evaluation of chromium and manganese exposure in welders and establishment of efficient preventive measures for fume exposure. J Korean Soc Occup Environ Hyg 2000;10(1):32-44
  14. Lippman M. Rationale for particle size-selective aerosol sampling. In: Vincent JH (ed.). Particle size-selective sampling for particulate air contaminants. Cincinnati, Ohio: ACGIH; 1999.
  15. Ministry of Employment and Labor (MoEL). Occupational exposure limits for chemicals and physical agents: MoEL notice 2013-38. Sejong: MoEL; 2010.
  16. Montes S, Riojas-Rodriguez H, Sabido-Pedraza E, Rios C. Biomarkers of manganese exposure in a population living close to a mine and mineral processing plant in Mexico. Environ Res. 2008;106(1):89-95
  17. Moon DH, Park YM, Lee CW, Park MH, Park SK, et al.. Manganese exposure and its health hazards of welders in shipbuilding manufacturing industry. Inje Med 1998;19(2):697-711
  18. Newland MC, Cox C, Hamada R, Oberdorster G, Weiss B. The clearance of manganese chloride in the primate. Fundam Appl Toxicol 1987;9:314-328
  19. Racette BA, Tabbal SD, Jennings D, Good LM, Perlmutter JS, et al.. A rapid method for mass screening for parkinsonism. Neurotoxi 2006;27(3):357-361
  20. Roels H, Lauwerys R, Buchet JP, Genet P, Sarhan MJ, et al.. Epidemiological survey among workers exposed to manganese: Effects on lung, central nervous system, and some biological indices. Am J Ind Med 1987;11(3):307-327
  21. Sadek AH, Rauch R, Schulz PE. Parkinsonism due to manganism in a welder. Int J Toxicol 2003;22: 393-401
  22. Sakong J, Chung JH, Sung NJ, Lee JJ, Park JT, et al.. Assessment of neurobehavioral performance among welders exposed to manganese. Korean J Occup Environ Med 2000;12(3):327-337
  23. Smyth LT, Ruhf RC, Whitman NE, Dugan T. Clinical manganism and exposure to manganese in the production and processing of ferromanganese alloy. J Occup Med 1973;15(2):101-109