Health risk assessment from exposure to particles during packing in working environments

Area of Science:

• Occupational Health and Safety
• Environmental Science
• Industrial Hygiene

Background:

• Packing raw materials, especially ceramics, can lead to significant airborne particle exposure, posing risks to respiratory and cardiovascular health.
• Understanding and mitigating worker exposure to fine particles is crucial for maintaining a safe work environment.
• Evaluating the efficacy of different exposure control strategies, such as source enclosure, is essential for effective risk management.

Purpose of the Study:

• To assess the effectiveness of source enclosure in mitigating airborne particle release during ceramic material packing.
• To compare worker exposure levels across different degrees of source enclosure (low, medium, high).
• To evaluate the performance of various exposure and risk assessment tools against measured data.

Main Methods:

• Monitored worker exposure to particle mass and number concentrations during the packing of seven ceramic materials.
• Utilized three packing lines with varying degrees of source enclosure: low (L), medium (M), and high (H).
• Compared measured exposure concentrations with predictions from risk assessment tools: Stoffenmanager, ART, and NanoSafer.

Main Results:

• Packing lines with low and medium source enclosure showed significant increases in respirable (119-609 μg/m³), inhalable (1150-4705 μg/m³), and particle number (24,755-51,645 cm⁻³) concentrations.
• The high source enclosure line (H) did not show significant increases in exposure concentrations, indicating its effectiveness.
• All tested risk assessment tools overestimated actual measured exposure concentrations by factors of 1.5 to 8.

Conclusions:

• Source enclosure is an effective strategy for mitigating particle release and reducing worker exposure during ceramic material packing.
• A significant gap exists between modelled and measured health risk assessments, necessitating further research for improved accuracy.
• The study highlights the importance of implementing robust engineering controls, like source enclosure, in industrial settings.