Release of Electron Donors during Thermal Treatment of Soils

Article pubs.acs.org/est

Cite This: Environ. Sci. Technol. XXXX, XXX, XXX−XXX

Release of Electron Donors during Thermal Treatment of Soils Tyler F. Marcet,† Natalie L. Cápiro,† Lawrence A. Morris,‡ Sayed M. Hassan,§ Yi Yang,∥ Frank E. Löffler,∥,⊥,#,○,■ and Kurt D. Pennell*,△ †

Department of Civil and Environmental Engineering, Tufts University, Medford, Massachusetts 02155, United States Warnell School of Forestry and Natural Resources and §Center for Applied Isotope Studies, University of Georgia, Athens, Georgia 30602, United States ∥ Department of Civil and Environmental Engineering, ⊥Department of Microbiology, #Center for Environmental Biotechnology, and ○ Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, Tennessee 37996, United States ■ Biosciences Division and Joint Institute for Biological Sciences (JIBS), Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States △ School of Engineering, Brown University, Providence, Rhode Island 02912, United States ‡

S Supporting Information *

ABSTRACT: Thermal treatment of soil and groundwater may provide an in situ source of soluble organic compounds and hydrogen (H2) that could stimulate microbial reductive dechlorination (MRD) at sites impacted by chlorinated solvents. The objectives of this study were to identify and quantify the release of electron donors and fermentable precursors during soil heating and to estimate availability of these compounds following thermal treatment. Fourteen solid materials containing