Factors Affecting Leaching Behavior of Nitrification Products from Diatomaceous Mudstone by Column Experiments

• IGARASHI Toshifumi

  Division of Sustainable Resources Engineering, Hokkaido University

• UEDA Takahiro

  Division of Sustainable Resources Engineering, Hokkaido University

• HOKORA Hideyuki

  Taiheiyo Consultant

• JO Mayumi

  Taisei Corporation

• KATO Kinya

  Raax Co., Ltd.

• MISHIRO Masataka

  Raax Co., Ltd.

• KUDO Hajime

  Horonobe Underground Research Center, Japan Atomic Energy Agency

Bibliographic Information

Other Title

• カラム溶出試験による珪藻質泥岩掘削土 (ズリ) 由来の硝化生成物の溶出に関する影響因子の考察
• カラム ヨウシュツシケン ニ ヨル ケイソウシツ デイガン クッサクド(ズリ)ユライ ノ ショウカ セイセイブツ ノ ヨウシュツ ニ カンスル エイキョウ インシ ノ コウサツ

Abstract

Horonobe Underground Research Center<tt>，</tt> located in northern Hokkaido<tt>，</tt> Japan<tt>，</tt> has been excavating shafts of underground research laboratory for R&D of radioactive waste disposal. In this site<tt>，</tt> the groundwater seepage from the shafts and leachate from the waste rock storage site contain high concentrations of total nitrogen. Ammoniumnitrogen<tt>，</tt> the major chemical species of nitrogen in the seepage and leachate<tt>，</tt> has been treated by the effluent treatment facility. However<tt>，</tt> the ammonium-nitrogen is transformed to nitrite- and nitrate-nitrogen (nitrification products) by nitrification. As a result<tt>，</tt> the concentrations of total nitrogen increase to the effluent guideline due to nitrification. Therefore<tt>，</tt> column experiments were carried out to understand the phenomena and the factors affecting the leaching behavior of nitrification products. The result showed that the nitrification was inhibited when the column layer was almost saturated<tt>，</tt> and that the nitrification occurred near the surface of waste rocks<tt>，</tt> in particular<tt>，</tt> at 25<tt>℃</tt>. These results indicate that nitrification can be mitigated by controlling the hydrological conditions in the waste rock storage site.

Journal

• Journal of MMIJ

  Journal of MMIJ 130 (2_3), 60-64, 2014

  The Mining and Materials Processing Institute of Japan

Keywords

• Diatomaceous Mudstone
• Nitrification
• Column Experiment
• Horonobe Underground Research Center

Details

• CRID: 1390001205281774592
• NII Article ID: 130004949475
• NII Book ID: AA12188381
• DOI: 10.2473/journalofmmij.130.60
• ISSN: 18840450
• ISSN: 18816118
• NDL BIB ID: 025196764
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025196764
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed