An experimental investigation of thermal methods for In-Situ remediation of MTBE-impacted groundwater

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Presentation Outline

  • Review of MTBE
  • Experiment Objectives
  • Experimental Procedure
  • Experimental Results
  • Implementation of Soil Heating in the Field
  • Conclusions.

Properties of MTBE

  • MTBE has a high solubility in water. It is ~ 24 times more soluble in water than Benzene (43,000 to 50,000 mg/L).
  • MTBE has a high vapor pressure, more than 2½ times greater than the vapor pressure of Benzene at 25 °C. The vapor pressure of MTBE (and BTEX) increases exponentially with temperature.
  • MTBE has a low Henry’s Law Constant (air-water partitioning coefficient) in comparison to the BTEX components that increases with temperature (more than doubles from 20 to 40 C).
  • The biodegradation rate of MTBE is an order of magnitude lower than that of the BTEX fuel components.
  • MTBE has a low organic partition coefficient in comparison to BTEX components, reflecting its lesser affinity for soil adsorption.
  • MTBE is lower specific gravity than water and a higher vapor density than air
  • MTBE has a low taste and odor threshold.

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