TY - JOUR
T1 - Interaction of Au(III) and Pt(IV) complex ions with Fe(II) ions as a scavenging and a reducing agent
T2 - A basic study on the recovery of Au and Pt by a chemical method
AU - Parinayok, Pornthip
AU - Yamashita, Mamiko
AU - Yonezu, Kotaro
AU - Ohashi, Hironori
AU - Watanabe, Koichiro
AU - Okaue, Yoshihiro
AU - Yokoyama, Takushi
N1 - Funding Information:
This study was financially supported by Grant-in-Aid for Research Activity Start-up from JSPS to the third author (No. 21860065) and CREST. The authors also acknowledge financial support from The Japan Mining Promotive Foundation.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.jcis.2011.07.038
DO - 10.1016/j.jcis.2011.07.038
M3 - Article
C2 - 21920530
AN - SCOPUS:80053212787
SN - 0021-9797
VL - 364
SP - 272
EP - 275
JO - Journal of Colloid And Interface Science
JF - Journal of Colloid And Interface Science
IS - 1
ER -