Toxicity of Deicing Fluids
The toxicity of deicing fluids is an environmental concern, and research is underway to find less toxic alternatives. For example, the US Air Force Research Laboratory (AFRL) is currently studying a chemical known as METSS ADF-2. Other strategies can be used to minimize the environmental impact such as collecting used fluid and using the maximum dilution consistent with safety. In 2009 the first use of a biological-based deice fluid was announced. Flybe, Europe's largest regional airline announced that it would be using a Kilfrost product containing 1,3-propanediol, a fermentation product of corn
More recently, organic compounds have been developed that reduce the environmental issues connected with salts and have longer residual effects when spread on roadways, usually in conjunction with salt brines or solids. These compounds are generated as byproducts of agricultural operations such as sugar beet refining or the distillation process that produces ethanol. Additionally, mixing common rock salt with some of the organic compounds and magnesium chloride results in spreadable materials that are both effective to much colder temperatures (-30°F/-34°C) as well as at lower overall rates of spreading per unit area.
For More Information: http://en.wikipedia.org/wiki/Deicing
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