Physicochemical and Mineralogical Characterization of Soil–Saprolite Cores from a Field Research Site, Tennessee

DOI Web Site Web Site Web Site 被引用文献1件
  • Ji‐Won Moon
    Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831
  • Yul Roh
    Faculty of Earth System and Environmental Sciences Chonnam National University 300 Yongbong‐Dong, Buk‐Gu Gwangju 500‐757 Korea
  • Tommy J. Phelps
    Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831
  • Debra H. Phillips
    Environmental Engineering Research Centre School of Architecture, Civil and Environmental Engineering, and Planning, Queen's University of Belfast Belfast BT9 5AG Northern Ireland UK
  • David B. Watson
    Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831
  • Young‐Jin Kim
    Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831
  • Scott C. Brooks
    Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831

この論文をさがす

説明

<jats:title>ABSTRACT</jats:title><jats:p>Site characterization is an essential initial step in determining the feasibility of remedial alternatives at hazardous waste sites. Physicochemical and mineralogical characterization of U‐contaminated soils in deeply weathered saprolite at Area 2 of the DOE Field Research Center (FRC) site, Oak Ridge, TN, was accomplished to examine the feasibility of bioremediation. Concentrations of U in soil–saprolite (up to 291 mg kg<jats:sup>−1</jats:sup>in oxalate‐extractable U<jats:sub>o</jats:sub>) were closely related to low pH (ca. 4–5), high effective cation exchange capacity without Ca (64.7–83.2 cmol<jats:sub>c</jats:sub>kg<jats:sup>−1</jats:sup>), amorphous Mn content (up to 9910 mg kg<jats:sup>−1</jats:sup>), and the decreased presence of relative clay mineral contents in the bulk samples (i.e., illite 2.5–12 wt. %, average 32 wt. %). The pH of the fill material ranged from 7.0 to 10.5, whereas the pH of the saprolite ranged from 4.5 to 8. Uranium concentration was highest (about 300 mg kg<jats:sup>−1</jats:sup>) at around 6 m below land surface near the saprolite–fill interface. The pH of ground water at Area 2 tended to be between 6 and 7 with U concentrations of about 0.9 to 1.7 mg L<jats:sup>−1</jats:sup>These site specific characteristics of Area 2, which has lower U and nitrate contamination levels and more neutral ground water pH compared with FRC Areas 1 and 3 (ca. 5.5 and <4, respectively), indicate that with appropriate addition of electron donors and nutrients bioremediation of U by metal reducing microorganisms may be possible.</jats:p>

収録刊行物

被引用文献 (1)*注記

もっと見る

問題の指摘

ページトップへ