Review of the environmental behavior and fate of methyl tert-butyl ether

✍ Scribed by Paul J. Squillace; James F. Pankow; Nic E. Korte; John S. Zogorski

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 87 KB
• Volume: 16
• Category: Article
• ISSN: 0730-7268
• DOI: 10.1002/etc.5620160911

✦ Synopsis

A review of pertinent equations and current research indicates that when gasoline oxygenated with methyl tert-butyl ether (MTBE) comes into contact with water, large amounts of MTBE can dissolve. At 25ЊC, the water solubility of MTBE is about 5,000 mg/L for a gasoline that is 10% MTBE by weight, whereas for a nonoxygenated gasoline, the total hydrocarbon solubility in water is typically about 120 mg/L. Methyl tert-butyl ether sorbs only weakly to subsurface solids; therefore, sorption does not substantially retard the transport of MTBE by ground water. In addition, MTBE generally resists biodegradation in ground water. The half-life of MTBE in the atmosphere can be as short as 3 d in a regional airshed. In the air, MTBE tends to partition into atmospheric water, including precipitation. However, the washing out of gas-phase MTBE by precipitation will not, by itself, greatly alter the gas-phase concentration of the compound in the air. The partitioning of MTBE to precipitation can nevertheless result in concentrations as high as 3 g/L or more in urban precipitation and can contribute to the presence of MTBE in surface and ground water.