転炉スラグを散布した底泥における硝酸塩の生物学的・化学的還元

• 大石 京子

  九州大学大学院工学研究院環境都市部門

• 楠田 哲也

  九州大学大学院工学研究院環境都市部門

書誌事項

タイトル別名

• Biological and Chemical Reduction of Nitrate in Sediments Amended with Converter Slag.
• テンロ スラグ オ サンプ シタ テイデイ ニ オケル ショウサンエン ノ セイブツガクテキ カガクテキ カンゲン

抄録

Based on the knowledge concerning the chemical reduction of NO₃-N in the presence of Fe²⁺ and Cu²⁺ as a catalyst at a high pH range, the feasibility of an Fe-rich converter slag for NO₃-N reduction in sediments was investigated. Components released from the slag were able to reduce NO₃-N chemically. Magnesia contained in the slag functioned as a substitute for Cu²⁺ which is hardly contained in the slag. The chemical reduction of NO₃-N was suppressed by phosphate. The major product of the chemical reduction of NO₃-N was NH₄-N, and the rates of formation of NO₂-N and N₂O-N were low. Biological reduction of NO₃-N was comparable to the chemical reduction in the sediment amended with the slag in the pH range from 8 to 9. The major product was also NH₄-N, but the denitrifying process became dominant with an increase in the biomass of denitrifiers. The release of NH₄-N and NO₂-N from the sediment amended with the slag was mainly due to chemical reduction of NO₃-N by the slag. Fe²⁺ and Mg²⁺ in sediments as well as those originated in the slag play a significant role in NO₃-N reduction.

収録刊行物

• 水環境学会誌

  水環境学会誌 26 (2), 111-116, 2003

  公益社団法人 日本水環境学会

キーワード

• converter slag
• iron
• magnesia
• nitrate reduction
• sediment

詳細情報

• CRID: 1390282680056751232
• NII論文ID: 130000306894
• NII書誌ID: AN10372439
• DOI: 10.2965/jswe.26.111
• COI: 1:CAS:528:DC%2BD3sXisFSjt7c%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL書誌ID: 6464866
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6464866
• Web Site: https://www.jstage.jst.go.jp/article/jswe/26/2/26_2_111/_pdf
• 本文言語コード: ja
• データソース種別:
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  • NDL
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