Distribution of toxic metals in dusts collected at different workshops

Hlavay, József; Antal, László; Polyák, Klára; Kárpáti, J.

doi:10.1016/0048-9697(93)90299-l

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Although the welding technique used by these workers was not speci ed, the authors stated that the metal content of coarse and respirable-size dusts was dependent on working procedure and workplace. (13) In a subsequent survey by another group at the present study site, welding exposure was measured during the winter. Levels of MnT appear similar during summer (AM 0.18 mg/m 3 , n = 27) and winter (AM 0.20 mg/m 3 , n = 10).…”

Section: Resultsmentioning

confidence: 99%

Assessment of Exposure to Manganese in Welding Operations During the Assembly of Heavy Excavation Machinery Accessories

Smargiassi

Baldwin

Savard

et al. 2000

Applied Occupational and Environmental Hygiene

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Welder exposure to metals in various industrial sectors is poorly characterized. We had the opportunity to carry out an exploratory study to characterize manganese exposure in welding operations in a recently established Quebec factory that assembled accessories for heavy excavation machinery. Ten workers were sampled for total manganese for at least two consecutive days out of three followed by two consecutive days for respirable manganese (with a size selective sampler with a median cut-off of 4 microns), during a typical week in the summer of 1998. Parts being welded were characterized as large or small. Small parts were those being welded on tables during subassembly. Workers were divided into two groups according to the parts they were welding. Seventy-eight percent of the total manganese exposure levels of welding operations during the assembly of large accessories of heavy excavation machinery exceeded the manganese American Conference of Governmental Industrial Hygienists (ACGIH) threshold limit value (TLV) of 0.20 mg/m3 (GM 0.24 mg/m3, n = 14) while none exceeded the TLV during the assembly of small pieces (GM 0.06 mg/m3, n = 8). Welding operations during the assembly of large heavy excavation machinery accessories may pose a significant health hazard. Considering the importance of task-related variables affecting exposure among workers, further studies are needed to better characterize exposure determinants of welding operations during the assembly of heavy excavation machinery accessories.

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Section: Resultsmentioning

confidence: 99%

Assessment of Exposure to Manganese in Welding Operations During the Assembly of Heavy Excavation Machinery Accessories

Smargiassi

Baldwin

Savard

et al. 2000

Applied Occupational and Environmental Hygiene

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Metal fumes toxicity and its association with lung health problems among welders in automotive industry

Bakri¹,

Hariri

Ismail

2019

J. Phys.: Conf. Ser.

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Welding Fume Exposure and Health Risk Assessment in a Cohort of Apprentice Welders

Dueck

Rafiee

Mino³

et al. 2021

Annals of Work Exposures and Health

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Welding fumes vary in composition depending on the materials and processes used, and while health outcomes in full-time welders have been widely studied, limited research on apprentices exists. Besides, few data are available for metals such as vanadium and antimony. This study aimed to look at individual metals present in welding fumes in the learning environment of apprentice welders. Forty-three welders and 41 controls were chosen from trade programmes at the Northern Alberta Institute of Technology. Ambient and personal air samples were collected at days 0, 1, 7, and 50 of their training and analysed for mass and metal concentrations using Inductively Coupled Plasma Mass Spectrometry. Results showed increases in particle and metal concentrations as apprentices progressed throughout their education and that concentrations at day 50 were similar to levels found in the literature for professional welders. Variable concentrations indicate that some individuals may not properly use the local exhaust ventilation system. Other possible explanation for variations are the position of the sampler on the shoulder, the time spent welding and in each welding position, and the skills of the welders. Strong relationships were observed between particle and metal concentrations, suggesting that these relationships could be used to estimate metal exposure in welders from particle exposure. Welding processes were the most important determinant of exposure in apprentice welders, with Metal Core Arc Welding producing the largest particle concentrations followed by oxyacetylene cutting, and Gas Metal Arc Welding. Health risk assessment showed that welder apprentices are at risk for overexposure to manganese, which suggests that professional welders should be monitored for manganese as they are exposed more than apprentices. Training in proper positioning of local exhaust ventilation system and proper use of respirators are recommended in training facilities.

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Distribution of toxic metals in dusts collected at different workshops

Cited by 3 publications

References 2 publications

Assessment of Exposure to Manganese in Welding Operations During the Assembly of Heavy Excavation Machinery Accessories

Assessment of Exposure to Manganese in Welding Operations During the Assembly of Heavy Excavation Machinery Accessories

Metal fumes toxicity and its association with lung health problems among welders in automotive industry

Welding Fume Exposure and Health Risk Assessment in a Cohort of Apprentice Welders

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