硫化鉄を用いた低温加熱処理による水銀汚染土壌の浄化技術に関する基礎研究

• 松山 明人

  大成建設 (株) エンジニアリング本部技術グループ

• 赤木 洋勝

  環境庁国立水俣病総合研究センター

書誌事項

タイトル別名

• Fundamental Study of Remediation Technology for Mercury Contaminated Soil by Low Temperature Thermal Treatment Using Iron Sulfide.
• リュウカテツ オ モチイタ テイオン カネツ ショリ ニ ヨル スイギン オセン ドジョウ ノ ジョウカ ギジュツ ニ カンスル キソ ケンキュウ

抄録

An increasing proportion of Environmental pollution with mercury take place in a number of developing countries, in particular, tropical region of South America, Africa and Southeast Asia have experienced tremendous increase in uncontrolled sector gold mining activities using mercury amalgamation technique since late 1970s. In order to resolve the these problems, techniques for the remediation of mercury polluted sites has been demanded in these countries.<br>In our precious reports, we have studied a remediation technology for mercury contaminated soil/sediment by the low temperature thermal treatment with iron chloride (FeCl₂) as additive. This process is characterized by soil heating method using physico-chemical reaction. However, in this reaction system, toxic hydrogen chloride gas are produced during the heating treatment which might corrode an apparatus and released mercury by heating treatment cannot be recovered as metallic mercury because the mercury reacts with hydrogen chloride gas to produce mercury chloride.<br>In order to overcome these drawbacks, we have undertaken basic research to develop more suitable remediation technology with another additive. As a results, it was found that mercuric sulfide in soils/sediments was removed more effectively by heating treatment with iron sulfide (FeS) as compared with iron chloride. Released mercury by heating treatment was recovered in the potassium permanganate solution. Moreover, this additive (FeS) is applied not only mercuric sulfide, but also other mercury compounds.<br>Our preliminary experiments with 2,000mg-Hg · kg^-1 dry weight artificially contaminated soil with mercuric sulfide and heating temperature 300°C showed that around 99% mercury was removed.

収録刊行物

• 水環境学会誌

  水環境学会誌 23 (10), 638-642, 2000

  公益社団法人 日本水環境学会

キーワード

• iron sulfide
• low temperature thermal treatment
• mercury
• remediation technology
• additive

詳細情報

• CRID: 1390282680056893952
• NII論文ID: 10007661653
• NII書誌ID: AN10372439
• DOI: 10.2965/jswe.23.638
• COI: 1:CAS:528:DC%2BD3cXos1akt7g%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL書誌ID: 5526477
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5526477
• Web Site: https://www.jstage.jst.go.jp/article/jswe/23/10/23_10_638/_pdf
• 本文言語コード: ja
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可