Interaction of Au(III) and Pt(IV) complex ions with Fe(II) ions as a scavenging and a reducing agent: A basic study on the recovery of Au and Pt by a chemical method

Pornthip Parinayok, Mamiko Yamashita, Kotaro Yonezu, Hironori Ohashi, Koichiro Watanabe, Yoshihiro Okaue, Takushi Yokoyama

研究成果: ジャーナルへの寄稿学術誌査読

7 被引用数 (Scopus)

抄録

In order to develop a chemical technique for the recovery of gold (Au) and platinum (Pt) in the metallic state from spent catalysts, e.g., catalysts for environmental protection and automobile and petroleum catalysts, the coprecipitation behaviors of Au(III) and Pt(IV) complex ions with Fe(OH)2 as a scavenging and reducing agent were investigated. The Au(III) complex ions were found to be stoichiometrically and rapidly reduced to metallic Au due to electron transfer in acidic aqueous solution prior to coprecipitation with Fe(OH)2. Conversely, Pt(IV) complex ions were reduced only after coprecipitation with Fe(OH)2 due to electron transfer through a Pt(IV)-O-Fe(II) bond on the solid Fe(OH)2. Using this chemical technique, Au and Pt can be selectively and effectively recovered in the metallic state.

本文言語英語
ページ(範囲)272-275
ページ数4
ジャーナルJournal of Colloid And Interface Science
364
1
DOI
出版ステータス出版済み - 12月 1 2011

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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