Limits...
Asbestos exposure among construction workers during demolition of old houses in Tehran, Iran.

Kakooei H, Normohammadi M - Ind Health (2013)

Bottom Line: Air quality in demolition practices has seldom been evaluated in Iran.Personal monitoring of asbestos fiber levels indicated a range from 0.01 to 0.15 PCM f/ml (0.02-0.42 SEM f/ml).Therefore, it might be expected that workers who worked in the demolition of old houses will suffer from negative effects of exposing to the asbestos fibers.

View Article: PubMed Central - PubMed

Affiliation: Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Iran.

ABSTRACT
Air quality in demolition practices has seldom been evaluated in Iran. Accordingly, we evaluated asbestos exposure among Tehran construction workers during the demolition of old houses. To identify possible sources of asbestos exposure, including thermal insulations, chimney pipes and cement sheets, were all sampled. This study also were taken the personal air samples to evaluate any asbestos exposure during the demolition. The asbestos fibers found in the samples were analyzed by phase-contrast optical microscopy (PCM), scanning electron microscopy (SEM) equipped with an energy dispersive X-ray analysis, and polarized light microscopy (PLM) methods. Personal monitoring of asbestos fiber levels indicated a range from 0.01 to 0.15 PCM f/ml (0.02-0.42 SEM f/ml). The geometric mean concentrations were 0.07 PCM f/ml (0.20 SEM f/ml), which is considerably higher than the threshold limit value (TLV) proposed by American Conference of Governmental Industrial Hygienist (ACGIH), which is 0.1 f/ml. The analysis showed a presence in the bulk samples only chrysotile asbestos and an absence of the other type asbestos. Therefore, it might be expected that workers who worked in the demolition of old houses will suffer from negative effects of exposing to the asbestos fibers.

Show MeSH

Related in: MedlinePlus

SEM image and EDS spectrum from sample of airborne particulate showing chrysotilefibers. Magnification, 1,500×.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4202766&req=5

fig_003: SEM image and EDS spectrum from sample of airborne particulate showing chrysotilefibers. Magnification, 1,500×.

Mentions: (A) PLM micrograph of airborne chrysotile fibers in the asbestos cement sheetsample to site demolition; (B) PLM micrograph of airborne chrysotile fibers in theventilation ducts and chimney pipes sample to the site. Chrysotile fiber has apositive sign of elongation and will show yellow fibers oriented in the NW-SEdirection, while they are blue in the NE-SE.


Asbestos exposure among construction workers during demolition of old houses in Tehran, Iran.

Kakooei H, Normohammadi M - Ind Health (2013)

SEM image and EDS spectrum from sample of airborne particulate showing chrysotilefibers. Magnification, 1,500×.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4202766&req=5

fig_003: SEM image and EDS spectrum from sample of airborne particulate showing chrysotilefibers. Magnification, 1,500×.
Mentions: (A) PLM micrograph of airborne chrysotile fibers in the asbestos cement sheetsample to site demolition; (B) PLM micrograph of airborne chrysotile fibers in theventilation ducts and chimney pipes sample to the site. Chrysotile fiber has apositive sign of elongation and will show yellow fibers oriented in the NW-SEdirection, while they are blue in the NE-SE.

Bottom Line: Air quality in demolition practices has seldom been evaluated in Iran.Personal monitoring of asbestos fiber levels indicated a range from 0.01 to 0.15 PCM f/ml (0.02-0.42 SEM f/ml).Therefore, it might be expected that workers who worked in the demolition of old houses will suffer from negative effects of exposing to the asbestos fibers.

View Article: PubMed Central - PubMed

Affiliation: Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Iran.

ABSTRACT
Air quality in demolition practices has seldom been evaluated in Iran. Accordingly, we evaluated asbestos exposure among Tehran construction workers during the demolition of old houses. To identify possible sources of asbestos exposure, including thermal insulations, chimney pipes and cement sheets, were all sampled. This study also were taken the personal air samples to evaluate any asbestos exposure during the demolition. The asbestos fibers found in the samples were analyzed by phase-contrast optical microscopy (PCM), scanning electron microscopy (SEM) equipped with an energy dispersive X-ray analysis, and polarized light microscopy (PLM) methods. Personal monitoring of asbestos fiber levels indicated a range from 0.01 to 0.15 PCM f/ml (0.02-0.42 SEM f/ml). The geometric mean concentrations were 0.07 PCM f/ml (0.20 SEM f/ml), which is considerably higher than the threshold limit value (TLV) proposed by American Conference of Governmental Industrial Hygienist (ACGIH), which is 0.1 f/ml. The analysis showed a presence in the bulk samples only chrysotile asbestos and an absence of the other type asbestos. Therefore, it might be expected that workers who worked in the demolition of old houses will suffer from negative effects of exposing to the asbestos fibers.

Show MeSH
Related in: MedlinePlus