Comparison of rates of pyrite oxidation by dissolved oxygen in aqueous solution and in compacted bentonite

DOI 参考文献40件
  • MANAKA Mitsuo
    Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology

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説明

Pyrite (FeS2) is a promising reducing agent that can be used to remove atmospheric oxygen in repositories for the geological disposal of high-level radioactive waste. In order to estimate the rate of pyrite oxidation in a repository environment, we conducted experiments using dissolved oxygen (DO) in alkaline solutions at 298 K. Pyrite samples were treated with alkaline solutions (pH adjusted to ∼ 9 and ∼ 10); these solutions were then saturated with air and adjusted to various ionic strengths (IS). The DO, total Fe, and SO42- concentrations in the experimental solutions were measured at regular intervals along with the pH. The rate constant for pyrite oxidation in solution was approximately 1/20 that determined in previous studies on pyrite oxidation in pyrite-containing compacted purified sodium bentonite.

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詳細情報 詳細情報について

  • CRID
    1390282681523558656
  • NII論文ID
    10024971702
  • NII書誌ID
    AA11460926
  • DOI
    10.2465/jmps.071023
  • ISSN
    13493825
    13456296
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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