If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

The Uptake of Gold(I) from Ammonia Leaching Solution by Imidazole Containing Polymeric Resins

$61.74 plus tax (Refund Policy)

Buy Article:

Abstract:

The polymeric resins containing guanylthiourea, 1-methylimidazole, 2-mercapto-1-methylimidazole ligands have been synthesized from vinylbenzyl chloride-divinylbenzene copolymers and used in the removal of Au(I) from ammonium buffer and ammoniacal thiosulphate solutions. The best gold sorption from ammonium buffer that contains 100 g/dm3 NH3 · H2O and 5 g/dm3 (NH4)2SO4, is reached in the case of 1-methylimidazole resin (2) (27.9 mg/g) and all three resins do not have a measurable sorption of copper(II) ammine complexes. The resins display a higher affinity towards gold(I) from ammoniacal thiosulphate solutions than from the ammonium buffer solution. The XPS analysis of gold loaded resins suggests the presence of gold at Au(I) oxidation state, most likely in the form of ionic pair Au(NH3)2+OH- or neutral complex AuNH3OH and as highly-dispersed metallic gold. The degree of gold desorption is about 50% using 1% potassium cyanide solution in 0.3% hydrogen peroxide solution. Resins retain their capacity towards gold in five consecutive sorption/desorption cycles.

Keywords: Desorption; gold(I); imidazole complexes; polymeric resins; sorption

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01496390902729007

Affiliations: 1: Laboratory of Polymer and Carbon Materials, Faculty of Chemistry, Wrocław University of Technology, Wyspianskiego, Wrocław, Poland 2: Laboratory of Hydrometallurgy, Faculty of Chemistry, Wrocław University of Technology, Wyspianskiego, Wrocław, Poland

Publication date: January 1, 2009

Related content

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more