論文

査読有り 本文へのリンクあり
2009年2月

Immobilization of arsenic from novel synthesized scorodite-analysis on solubility and stability

Materials Transactions
  • Tetsuo Fujita
  • ,
  • Ryoichi Taguchi
  • ,
  • Hisashi Kubo
  • ,
  • Etsuro Shibata
  • ,
  • Takashi Nakamura

50
2
開始ページ
321
終了ページ
331
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.2320/matertrans.M-MRA2008844

The solubility of scorodite synthesized in a novel atmospheric process was investigated. Stable scorodite (FeAsO4·H2O) particles were produced by introducing oxidizing gas into a reaction mixture containing ferrous sulfate and high-concentration arsenic (V) to convert ferrous ion to ferric ion. The obtained scorodite crystals released a very low, almost negligible concentration of arsenic in the pH range of 3 to 6, suggesting its long-term stability. The thermodynamic parameters for the dissolution reaction of scorodite, Ksp and ΔGf, were similar to those reported previously. The results show scorodite released a considerably high concentration of arsenic under specific leaching conditions. In particular, the combination of CaO and NaCl present in the alkaline leaching solution had a significant effect on the mobilization of arsenic. Although this study did not cover all possible natural environments in which scorodite would be stored, it seems practically impossible to develop conditions that would completely prevent the dissolution of arsenic from scorodite. It is crucial to develop scorodite storage methods that will minimize the risk of environmental arsenic contamination based on accurate evaluation of the conditions for the leaching of arsenic. © 2009 The Mining and Materials Processing Institute of Japan.

リンク情報
DOI
https://doi.org/10.2320/matertrans.M-MRA2008844
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=63149189853&origin=inward 本文へのリンクあり
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https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=63149189853&origin=inward
ID情報
  • DOI : 10.2320/matertrans.M-MRA2008844
  • ISSN : 1345-9678
  • SCOPUS ID : 63149189853

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