1 / 13

Calcium Magnesium Acetate and Sodium Chloride, Two Deicers , and their Effects on Water Quality

Calcium Magnesium Acetate and Sodium Chloride, Two Deicers , and their Effects on Water Quality. Eileen Field Snow Hydrology, GEOG 5321. Deicing Technology . Deicing of roadways has been used as a means to create a safe environment for travel Accident levels decrease after deicing.

veda-giles
Télécharger la présentation

Calcium Magnesium Acetate and Sodium Chloride, Two Deicers , and their Effects on Water Quality

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Calcium Magnesium Acetate and Sodium Chloride, Two Deicers , and their Effects on Water Quality Eileen Field Snow Hydrology, GEOG 5321

  2. Deicing Technology • Deicing of roadways has been used as a means to create a safe environment for travel • Accident levels decrease after deicing

  3. Sodium Chloride • Used as a deicer since the 1930’s • Has been known to be detrimental to water supplies • Stored in dome such as this to help prevent leakage

  4. Calcium Magnesium Acetate • Currently sold by the Cryotech Deicing Technology Corporation • Sold in a pelletized version that is hydrated to form a CMA solution

  5. Eutectic Points for Deicers • CMA and Sodium Chloride have different eutectic points • Eutectic point is the lowest possible melting temperature for a given mixture of materials

  6. Corrosion • A problem with deicing technology is its ability to cause a corrosive reaction on metals to which it comes in contact • CMA is less corrosive than Sodium Chloride

  7. Deicing Studies • The Effect of Calcium Magnesium Acetate (CMA) Deicing Material on the Water Quality of Bear Creek, Clackamas County, Oregon, 1999 By Tanner and Wood, Water Resources Investigation No. 00-4092 • Environmental Monitoring and Evaluation of Calcium Magnesium Acetate (CMA) By Horner, National Research Council Report 305, Washington, D.C.

  8. Deicing Studies (cont) • Effects of Calcium Magnesium Acetate, A Road Deicer, on the Lentic Environment In Interior Alaska; Rea and LaPerriere, 1985, Alaska Department of Transportation • A Method of Predicting Road Salt Runoff in New Hampshire; Spear and Schiffman, 1975, National Academy of Sciences, Washington, D.C.

  9. Tanner and Wood Study • Assessed the effects of the addition of CMA into several ponds • The biochemical oxygen demand, measure of the quantity of oxygen consumed by microorganisms during the decomposition or organic matter, for this study is listed

  10. Horner Study • The effects of the addition of CMA to eight ponds was assessed • Percent of CMA exerted after five and twenty days is listed

  11. Rea and LaPerriere Study • Calcium ion concentration was found for several ponds that were tested • Results are listed

  12. Due to ionic pulse action within the snowpack, Sodium concentrations exceed levels suggested by the American Heart Association Precipitation Amounts Spear and Schiffman Study

  13. Conclusion • Sodium Chloride does have negative environment impacts based on its ability to contaminate groundwater • Calcium Magnesium Acetate is a viable deicing alternative but it does cost as much as twenty times more than Sodium Chloride

More Related