混合塩による塩化と温水浸出の連続処理による鉛汚染土壌の浄化 Lead Removal from Contaminated Soil by Sequential Application of Chlorination by Mixed Salt and Warm Water Extraction

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著者

    • 佐藤 史淳 SATO Fumiatsu
    • 名古屋大学 大学院工学研究科 Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University
    • 佐野 浩行 SANO Hiroyuki
    • 名古屋大学大学院工学研究科 マテリアル理工学専攻 Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University
    • 藤澤 敏治 FUJISAWA Toshiharu
    • 名古屋大学大学院工学研究科 マテリアル理工学専攻 Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University

抄録

In recent years, an increasing number of urban soil contamination cases has been found during redevelopment of former factory sites. Hydroclassification technique, separating heavily contaminated fine soil particles from contaminated sites, is one of the economical remediation techniques for contaminated soil by heavy metals, but the separated fine soil particles are generally landfilled because of the difficulty in removing heavy metals strongly adsorbed on them.<BR>In the previous study, the authors have investigated the mechanism and the optimum condition of chlorination-volatilization technique to eliminate heavy metals from inorganic waste and found it was needed to heat up around 1273K. <BR>In this paper, a new remediation technique for lead contaminated fine soil particles is proposed. This technique is composed of chlorination and subsequent warm water extraction. In the chlorination step, water-insoluble lead complex is chlorinated to be water-soluble lead chloride without volatilization, by heating the soils with MgCl<SUB>2</SUB>-CaCl<SUB>2</SUB>-KCl salt mixture at relatively low temperature. By subsequent warm water extraction, lead chloride is leached out. Effects of chlorination conditions, such as time, temperature, composition of the salt and added salt ratio, on lead behavior were investigated. It was proved that lead concentration could be reduced to be below Japanese environmental standard.

収録刊行物

  • Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan  

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan 124(4), 254-259, 2008-05-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10021121537
  • NII書誌ID(NCID)
    AA12188381
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    18816118
  • NDL 記事登録ID
    9533617
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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