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[Carcinogenic N-nitrosamines in the tire industry]
Meditsina Truda I Promyshlennaia Ekologiia
|January 1, 1993
Summary
Volatile carcinogenic N-nitrosamines (NA) in tyre production air exceed safe limits, with N-nitrosomorpholine being a major pollutant. Improved rubber mixtures and regulations are needed to control atmospheric pollution from tyre manufacturing.
Area of Science:
- Industrial Hygiene
- Environmental Chemistry
- Occupational Health
Context:
- Tyre production facilities present unique occupational and environmental health challenges.
- Volatile carcinogenic N-nitrosamines (NA) are significant air pollutants in industrial settings.
- Existing Maximum Allowable Concentrations (MACs) for NA may be insufficient.
Purpose:
- To quantify volatile carcinogenic N-nitrosamine levels in tyre production air.
- To identify specific NA compounds and their sources within the production process.
- To assess the influence of modifiers on NA release from rubber.
Summary:
- Air samples from tyre production sites revealed elevated levels of volatile carcinogenic N-nitrosamines (NA), exceeding international MACs.
- N-nitrosomorpholine was detected at particularly high concentrations (91 g/m3), likely due to its use as a raw material.
- Gas chromatography with a thermal energy detector (TEA 502A) was employed for NA detection.
- The modifier 4-nitrosodiphenylamine did not significantly affect NA release under simulated process conditions.
Impact:
- Highlights the urgent need for stricter regulation of N-nitrosamines in the tyre industry.
- Underscores the importance of developing improved rubber mixtures to mitigate atmospheric pollution.
- Contributes to understanding and controlling occupational exposure to carcinogens in manufacturing environments.