Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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 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.
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 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.
Leaching of gold, silver and accompanying metals from circuit boards (PCBs) waste
Jana Ficeriová (Autor:in) / Peter Baláž (Autor:in) / Eberhard Gock (Autor:in)
2011
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
waste , gold , silver , accompanying metals , leaching , Mining engineering. Metallurgy , TN1-997 , Geology , QE1-996.5
Metadata by DOAJ is licensed under CC BY-SA 1.0
Selective Leaching of Valuable Metals from Waste Printed Circuit Boards
| Taylor & Francis Verlag | 2003
Gold and silver selectively leaching from printed circuit boards scrap with acid thiourea solution
| British Library Online Contents | 2009
A Study of Liberation and Separation Process of Metals from Printed Circuit Boards (PCBs) Scraps
| British Library Online Contents | 2014
The ammonia leaching of alloy produced from waste printed circuit boards smelting process
| Taylor & Francis Verlag | 2013