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This article in JEQ

  1. Vol. 37 No. 6, p. 2058-2062
     
    Received: Dec 26, 2007
    Published: Nov, 2008


    * Corresponding author(s): jaffe@princeton.edu
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doi:10.2134/jeq2007.0665

Effect of Sulfate on the Simultaneous Bioreduction of Iron and Uranium

  1. John Komlosa,
  2. Hee Sun Moonb and
  3. Peter R. Jaffé *b
  1. a Dep. of Civil and Environmental Engineering, Villanova Univ., Villanova, PA 19085
    b Dep. of Civil and Environmental Engineering, Princeton Univ., Princeton, NJ 08544

Abstract

The biogeochemistry related to iron- and sulfate-reducing conditions influences the fate of contaminants such as petroleum hydrocarbons, trace metals, and radionuclides (i.e., uranium) released into the subsurface. An understanding of these processes is imperative to successfully predict the fate of contaminants during bioremediation scenarios. A series of flow-through sediment column experiments were performed to determine if the commencement of sulfate-reducing conditions would occur while bioavailable Fe(III) was present and to determine how the bioreduction of a contaminant (uranium) was affected by the switch from iron-dominated to sulfate-dominated reducing conditions. The results presented herein demonstrated that, under biostimulation, sulfate reduction can commence even though a significant pool of bioavailable Fe(III) is present. In addition, the rate of U(VI) reduction was not negatively affected by the commencement of sulfate-reducing conditions.

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Copyright © 2008. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of America