Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste
Au-Ag noble metal wastes represent a wide range of waste types and forms, with various accompanying metallic elements.The presented leaching strategy for Au-Ag contained in circuit boards (PCBs) aims at gaining gold and silver in the metallic form.Application of the proposed ammonium thiosulphate le...
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Technical University of Kosice
2011-12-01
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doaj-3cde6263155648638440b2ad86af12bd2020-11-25T01:32:10ZengTechnical University of Kosice Acta Montanistica Slovaca1335-17882011-12-01162128131Leaching of gold, silver and accompanying metals from circuit boards (PCBs) wasteJana FiceriováPeter BalážEberhard GockAu-Ag noble metal wastes represent a wide range of waste types and forms, with various accompanying metallic elements.The presented leaching strategy for Au-Ag contained in circuit boards (PCBs) aims at gaining gold and silver in the metallic form.Application of the proposed ammonium thiosulphate leaching process for the treatment of the above mentioned Au-Ag containing wastesrepresents a practical, economic and at the same time an ecological solution. The ammonium thiosulphate based leaching of gold and silverfrom PCBs waste, using crushing as a pretreatment, was investigated. It was possible to achieve 98 % gold and 93 % silver recovery within48 hours of ammonium thiosulphate leaching. This type of leaching is a better leaching procedure for recovery of gold and silver from PCBwaste than the classical toxic cyanide leaching. 84 % Cu, 82 % Fe, 77 % Al, 76 % Zn, 70 % Ni, 90 % Pd, 88 % Pb and 83 % Sn recovery ofthe accompanying metals was achieved, using sulphuric acid with hydrogen peroxide, sodium chloride and aqua regia. A four steps leachingprocess gave a very satisfactory yield and a more rapid kinetics for all observed metals solubilization than other technologies.http://actamont.tuke.sk/pdf/2011/n2/2ficeriova.pdfwastegoldsilveraccompanying metalsleaching |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jana Ficeriová Peter Baláž Eberhard Gock |
spellingShingle |
Jana Ficeriová Peter Baláž Eberhard Gock Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste Acta Montanistica Slovaca waste gold silver accompanying metals leaching |
author_facet |
Jana Ficeriová Peter Baláž Eberhard Gock |
author_sort |
Jana Ficeriová |
title |
Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste |
title_short |
Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste |
title_full |
Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste |
title_fullStr |
Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste |
title_full_unstemmed |
Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste |
title_sort |
leaching of gold, silver and accompanying metals from circuit boards (pcbs) waste |
publisher |
Technical University of Kosice |
series |
Acta Montanistica Slovaca |
issn |
1335-1788 |
publishDate |
2011-12-01 |
description |
Au-Ag noble metal wastes represent a wide range of waste types and forms, with various accompanying metallic elements.The presented leaching strategy for Au-Ag contained in circuit boards (PCBs) aims at gaining gold and silver in the metallic form.Application of the proposed ammonium thiosulphate leaching process for the treatment of the above mentioned Au-Ag containing wastesrepresents a practical, economic and at the same time an ecological solution. The ammonium thiosulphate based leaching of gold and silverfrom PCBs waste, using crushing as a pretreatment, was investigated. It was possible to achieve 98 % gold and 93 % silver recovery within48 hours of ammonium thiosulphate leaching. This type of leaching is a better leaching procedure for recovery of gold and silver from PCBwaste than the classical toxic cyanide leaching. 84 % Cu, 82 % Fe, 77 % Al, 76 % Zn, 70 % Ni, 90 % Pd, 88 % Pb and 83 % Sn recovery ofthe accompanying metals was achieved, using sulphuric acid with hydrogen peroxide, sodium chloride and aqua regia. A four steps leachingprocess gave a very satisfactory yield and a more rapid kinetics for all observed metals solubilization than other technologies. |
topic |
waste gold silver accompanying metals leaching |
url |
http://actamont.tuke.sk/pdf/2011/n2/2ficeriova.pdf |
work_keys_str_mv |
AT janaficeriova leachingofgoldsilverandaccompanyingmetalsfromcircuitboardspcbswaste AT peterbalaz leachingofgoldsilverandaccompanyingmetalsfromcircuitboardspcbswaste AT eberhardgock leachingofgoldsilverandaccompanyingmetalsfromcircuitboardspcbswaste |
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