Assessing Fog Oil Deposition to Simulated Plant Surfaces During Military Training
ENGINEERING RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
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Fog oil is used as a battlefield obscurant during military operations. A smoke-like aerosol is emitted from mobile generators by volatilizing standard grade fuel 2 and blowing it through a heated manifold. In this study we monitored fog oil aerosol deposition to environmental surfaces during training. This project had two goals to assess fog oil aerosol deposition as total petroleum hydrocarbon, TPH to environmental media and to quantify whether glass membrane fiber filters are a suitable proxy for plant surfaces. In support of these goals we exposed glass membrane fiber filters and collectors simulating plant surfaces silk flowers and polypropylene leaves to fog oil training. Samplers were deployed during winter and summer events. In the summer, TPH concentrations on leaves, flowers, and filters were strongly correlated, though flowers and leaves consistently yielded TPH concentrations 60 higher than filters. In the winter, TPH concentrations on polypropylene leaves and silk flowers were not correlated with concentrations measured on glass membrane filters. TPH concentrations measured during the winter were 100 times lower than in the summer. We attribute the winter anomalies to the presence of a low-level inversion at the ground surface that could have affected fog oil aerosol transport and deposition.
- Organic Chemistry
- Physical Chemistry
- Environmental Health and Safety