Variability in total dust exposure in a cement factory

Area of Science:

• Occupational Health and Safety
• Industrial Hygiene
• Environmental Epidemiology

Background:

• Exposure assessment is crucial for epidemiological studies, with variability analysis being a common approach.
• Cement factory environments present potential occupational health risks due to dust exposure.

Purpose of the Study:

• To assess dust exposure levels and variability among different job roles in a cement factory.
• To determine the probability of long-term mean exposure exceeding the occupational exposure limit (OEL).

Main Methods:

• Collected 129 dust samples from 197 personnel in an Iranian cement factory.
• Analyzed between- and within-group variability using a one-way random effects model.
• Calculated the probability of exceeding the OEL of 10 mg/m³ for total dust.

Main Results:

• Geometric means for total dust were highest in crusher (20.84 mg/m³), packing (17.29 mg/m³), and kiln (16.78 mg/m³) areas.
• Approximately 59% of exposure variability was attributed to differences between job groups (Similar Exposure Groups - SEGs).
• Kiln and packing areas showed a 100% probability of exceeding the OEL, followed by cement mill (90%) and crusher (73%).

Conclusions:

• Significant differences in dust exposure exist between SEGs in the cement factory.
• Workers in specific areas like kilns and packing face a high risk of exceeding occupational exposure limits.
• Targeted interventions are necessary to mitigate dust exposure and protect worker health in high-risk cement factory zones.