Transformations of [Au(CN)2]- at the contact with activated carbon surface

被引：1
|
作者：
Ibragimova, R. I. [1 ,2 ]
Kubyshkin, S. A. [1 ]
Fateev, A. A. [1 ]
Krivov, A. S. [1 ,3 ]
Fedyukevich, V. A. [1 ,3 ]
Shcherbakov, Yu. S. [1 ]
Mil'man, B. M. [1 ]
Vorob'ev-Desyatovskii, N. V. [1 ]
机构：
[1] JSC Polymet Engn, St Petersburg 198216, Russia
[2] St Petersburg Technol & Design Univ, St Petersburg, Russia
[3] Tech Univ, St Petersburg State Inst Technol, St Petersburg, Russia
来源：
RUSSIAN JOURNAL OF GENERAL CHEMISTRY | 2013年 / 83卷 / 12期
基金：
俄罗斯基础研究基金会;
关键词：
NITROGEN-FIXATION; CYANO-COMPLEXES; GOLD; ADSORPTION; MECHANISM; OXIDATION; BEHAVIOR; WATER;
D O I：
10.1134/S1070363213120050
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We have studied the processes occurring when alkaline aqueous solution of Na[Au(CN)(2)] is brought in contact with activated carbon surface. It has been shown that the adsorption of the gold cyanide complex occurs via several independent routes, one of them being accompanied with the partial breakdown of the inner sphere of the compound and free cyanide ions release into the solution. The latter process decreases the gold recovery by aqueous NaOH during the high-temperature (150A degrees C) desorption. A prolonged storage of the adsorbent saturated with [Au(CN)(2)](-) in air produces a similar result. The reasons of the observed phenomena have been discussed.
引用
收藏
页码：2254 / 2259
页数：6
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