Sorption distribution coefficients of selenium on a sandy mudstone under reducing conditions of underground

DOI Web Site 1 Citations 9 References
  • Iida Yoshihisa
    Japan Atomic Energy Agency, Nuclear Safety Research Center, Waste Disposal and Decommissioning Safety Research Group
  • Kimura Yuichiro
    Japan Atomic Energy Agency, Nuclear Safety Research Center, Waste Disposal and Decommissioning Safety Research Group IHI corporation
  • Yamaguchi Tetsuji
    Japan Atomic Energy Agency, Nuclear Safety Research Center, Waste Disposal and Decommissioning Safety Research Group
  • Ueda Masato
    Japan Atomic Energy Agency, Nuclear Safety Research Center, Waste Disposal and Decommissioning Safety Research Group Ueda Professional Engineer Office
  • Tanaka Tadao
    Japan Atomic Energy Agency, Nuclear Safety Research Center, Waste Disposal and Decommissioning Safety Research Group
  • Nakayama Shinichi
    Japan Atomic Energy Agency, Nuclear Safety Research Center, Waste Disposal and Decommissioning Safety Research Group

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Other Title
  • 地下の還元的な条件下でのセレンの砂質泥岩への収着分配係数
  • 地下の還元的な条件下でのセレンの砂質泥石への収着分配係数
  • チカ ノ カンゲンテキナ ジョウケンカ デノ セレン ノ サシツ デイセキ エノ シュウチャク ブンパイ ケイスウ

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Abstract

  Sorption of radionuclides on rocks is an important factor for safety assessments of geologic disposal of radioactive wastes. Batch sorption tests were conducted to investigate effects of concentrations of NaNO3 and NaCl on sorption distribution coefficients (Kd) of selenium on a sandy mudstone under reducing environment of underground. The rock and groundwater used in the tests were sampled from depths of 129-156 m with special care minimizing contact with air. Selenium was spiked as HSe-to the test solutions and kept reducing conditions (Eh, pH) of the solutions throughout the test periods. Obtained log Kd (m3 kg-1) values were in a range of -1.84 to -1.44, which were as high as those for Cs.

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