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Characterization of Nanoparticles from Welding and Grinding Processes: Evaluation of Number Concentration and Size Distribution  

Kim, Boowook (Occupational Lung Diseases Institute, Korea Workers' Compensation and Welfare Service)
Kim, Hyunwook (Department of Preventive Medicine, College of Medicine, The Catholic University of Korea)
Publication Information
Journal of Korean Society of Occupational and Environmental Hygiene / v.22, no.3, 2012 , pp. 184-190 More about this Journal
Abstract
Objectives: This study aimed to characterize the nanoparticles produced by welding and grinding processes. Methods: The number concentrations of particles were mapped to determine the distribution of welding fumes in a workplace atmosphere using a hand-held condensation particle counter. An electrical low-pressure impactor was used for measuring the number concentration and particle size distribution. Results: High number concentrations were found around arc cutting and welding (grinding) processes. In the worker's breathing zone, the mean number concentration was 655,000 particles/cm3 and the count median diameter (CMD) was 84 nm with several multi peak distributions (~20, 70, 300 nm). However, at a distance of 3 m from the welding position, the number concentration decreased to 153,000 particles/cm3 with a 70 nm single peak size distribution. During a grinding process, peaks with high concentrations of nanoparticles were temporarily observed. The mean number concentration was 1,520,000 particles/cm3, and the CMD was 30 nm. Nanoparticles (<100 nm) made up 58% and 92% of the aerosols produced by welding and grinding processes, respectively.
Keywords
Nanoparticle; ELPI; welding fume; grinding particle; exposure assessment;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Lee JH, Lee SB, Bae GN, Jeon KS, Yoon JU et al. Exposure assessment of carbon nanotube manufacturing workplaces. Inhal Toxicol 2010; 22: 369-381   DOI   ScienceOn
2 Maynard AD, Zimmer AT. Evaluation of grinding aerosols in terms of alveolar dose: The significance of using mass, surface area and number metrics. Ann Occup Hyg 2002; 46(supplement 1): 315-319
3 Oberdörster G, Sharp Z, Atudorei V, Elder A, Gelein R, Kreyling W, Cox C. Translocation of inhaled ultrafine particles to the brain. Inhalation Toxicology 2004; 16: 437-445   DOI   ScienceOn
4 Pekkanen J, Peter A, Hoek G, Tiittanen P, Brunekreef B, et al. Particulate air pollution and risk of ST-segment depression during repeated submaximal exercise tests among subjects with coronary heart disease. The exposure and risk assessment for fine and ultrafine particle particle in ambient air (ULTRA) study. Circulation 2002; 106: 933-938   DOI   ScienceOn
5 Peter TM, Heitbrink WA, Evans DE, Slavin TJ, Maynard AD. The mapping of fine and ultrafine particle concentrations in an engine machining and assembly facility. Ann Occup Hyg 2006; 50: 249-257
6 Pfefferkorn FE, Bello D, Haddad G, Park JY, Powell M, et al. Characterization of exposures to airborne nanoscale particles during friction stir welding of aluminum. Ann Occup Hyg 2010; 54 (5): 486-503   DOI   ScienceOn
7 Ramachandran G, Ostraat M, Evans DE, Methner MM, O'Shaughnessy P, D'Arcy J et al. A strategy for assessing workplace exposure to nanomaterials. J Occup Environ Hyg 2011; 8: 673-685   DOI   ScienceOn
8 Stephenson D, Seshadri G, Veranth JM. Workplace exposure to submicron particle mass and number concentrations from manual arc welding of carbon steel. AIHAJ 2003; 64: 516-521
9 Zimmer AT, Baron PA, Biswas P. The influence of operating parameters on number-weighted aerosol size distribution generated from a gas metal arc welding process. J Aerosol Sci 2002; 33: 519-531   DOI   ScienceOn
10 윤충식. 나노물질의 측정전략의 주요 쟁점. 한국환경보건학회지 2011; 37 (1): 73-79
11 하주현, 신용철, 이승철, Samuel Y.Paik, 김부욱 등. 탄소나노튜브 표면 처리 실험실 종사자의 공기중 나노입자 노출에 관한 연구. 한국환경보건학회지 2010; 36 (5): 343-350
12 Buonanno G, Morawska L, Stabile L. Exposure to welding particles in automotive plants. J Aerosol Sci 2011; 42: 295-304   DOI   ScienceOn
13 Donaldson K, Stone V, Gilmour PS, Brown DM, MacNee W. Ultrafine particles : mechanisms of lung injury. Phil Trans R Soc Lond A 2000; 358: 2741-2749   DOI   ScienceOn
14 European Commission. New nanomaterial definition. 2011. availble from: URL:http://europa.eu/rapid/pressReleases Action.do?reference=IP/11/1202
15 Han JH, Lee EJ, Lee JH, So KP, Lee YH et al. Monitoring multiwalled carbon nanotube exposure in carbon nanotube research facility. Inhal Toxicol 2008; 20: 741-749   DOI   ScienceOn
16 International Commission on Radiological Protection. Human respiratory tract model for radiological protection. Annals. ICRP 1994;24(1-3). ICRP publication 66
17 International Organization for Standardization. ISO TR 27628. Nanotechnologies - workplace atmosphere ultrafine, nanoparticle and nano-structured aerosolinhalation exposure characterization and assessment, ISO, Geneva, 2007
18 Klot SV, Wolke G, Tuch T, Heinrich J, Dockery DW, et al. Increased asthma medication use in association with ambient fine and ultrafine particle. Eur Respir J 2002; 20: 691-702   DOI   ScienceOn
19 Kreying WG, Semmler M, Erbe F, Mayer P, Takenaka S, et al. Translocation of ultrafine insoluble iridium particles from lung epithelium to extrapulmonary organs is size dependent but very low. J Toxicol Environ Health 2002; 65 (20): 1513-1530   DOI   ScienceOn