Sorption of gold and silver on carbon adsorbents from thiocyanate solutions

Тип публикации: статья из журнала

Год издания: 2005

Идентификатор DOI: 10.1016/j.carbon.2004.08.021

Ключевые слова: activated carbon; chemical treatment; adsorption; adsorption properties

Аннотация: Sorption recovery of thiocyanate gold and silver complexes on different carbon adsorbents has been studied using model solutions with concentrations 0.08-0.82mmol/I and 0.16-1.06mmol/l for gold and silver, respectively. The potassium thiocyanate concentration in these solutions was 0.25mol/l and the pH of the contacting solution was similar to2. The degree of recovery exceeded 90% for gold and 80% for silver. The separate step-by-step desorption of thiocyanate gold and silver complexes was carried out by varying the initial concentration of thiocarbamide (desorption agent). The degree of recovery of noble metals can be increased up to 95% using basic thiocarbamide solutions (in 0.1-0.2M NaOH) at the higher temperature of the process (up to 150degreesC. (C) 2004 Elsevier Ltd. All rights reserved.

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Издание

Журнал: CARBON

Выпуск журнала: Vol. 43, Is. 1

Номера страниц: 17-22

ISSN журнала: 00086223

Место издания: OXFORD

Издатель: PERGAMON-ELSEVIER SCIENCE LTD

Авторы

  • Kononova O.N. (Department of Chemistry,Krasnoyarsk State University)
  • Danilenko N.V. (Department of Chemistry,Krasnoyarsk State University)
  • Kachin S.V. (Department of Chemistry,Krasnoyarsk State University)
  • Dmitrieva Zh.V. (Department of Chemistry,Krasnoyarsk State University)
  • Kholmogorov A.G. (Inst. of Chem. and Chem. Technology,Siberian Department,Russian Academy of Science)
  • Kononov Y.S. (Inst. of Chem. and Chem. Technology,Siberian Department,Russian Academy of Science)

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