酸化マグネシウムによる重金属類汚染土の不溶化処理と土壌中での鉱物化学反応

• 和田 信一郎

  九州大学大学院農学研究院

• 森下 智貴

  九州大学大学院生物資源環境科学府

書誌事項

タイトル別名

• Stabilization of Heavy Metals Contaminated Soils by Magnesium Oxide and Related Chemical and Mineralogical Reactions
• サンカ マグネシウム ニ ヨル ジュウキンゾクルイ オセンド ノ フヨウカ ショリ ト ドジョウ チュウ デ ノ コウブツ カガク ハンノウ

抄録

The use of magnesium oxide (MgO) as a stabilizing agent for inorganic soil pollutants including heavy metals, arsenic, boron, fluoride and selenium is reviewed. On mixing MgO with soils it reacts with soil water to form magnesium hydroxide and supplies magnesium and hydroxide ions. Magnesium ion forms sparingly soluble compounds with fluoride and arsenic but their solubilities are not low enough to meet the water quality and soil quality standards in Japan. Similarly, the solubilities of hydroxides of cadmium and lead are not necessarily low enough. Experimental studies suggest that the major stabilization mechanism is the incorporation into the magnesium hydroxide structure for fluoride and surface complexation at surface hydroxyl groups for oxyanions. For cationic heavy metals, surface complexation reactions at hydroxylated surfaces of soil minerals are highly probable but they do not seem to have been adequately assessed. MgO is known to react with various soil minerals to form layer silicates and Mg-Al double hydroxides. Stabilization of pollutants by thus formed secondary minerals is also probable but it has not received due attention.

収録刊行物

• 粘土科学

  粘土科学 51 (3), 107-117, 2013

  一般社団法人 日本粘土学会

キーワード

• heavy metals
• magnesium oxide
• magnesium hydroxide
• soil pollution
• stabilization

詳細情報

• CRID: 1390001204111201920
• NII論文ID: 110009604680
• NII書誌ID: AN00199972
• DOI: 10.11362/jcssjnendokagaku.51.3_107
• ISSN: 21863563
• ISSN: 04706455
• NDL書誌ID: 024758006
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024758006
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
  • Crossref
• 抄録ライセンスフラグ: 使用不可