Ion exchange resins were investigated for the effective recovery of platinum, palladium, and gold from a pregnant cyanide heap leach solution. Screening results indicated that strong-base anion exchange resins proved to be most effective in the recovery of these metal cyanides. Gold was selectively recovered with the use of Minix, while effective recovery of gold, platinum, and palladium over t...

 Cyanidation is a relatively simple and cheap technology to treat gold-containing ores. However, this process is not completely effective in refractory gold-bearing sulfide ores. In the case of very low-grade ores, biooxidation is an attractive alternative pre-treatment to render the gold amenable to extraction. This process utilizes the ability of acidophilic bacteria to oxidize the sulfide m...

Removal, recovery, and recycles of gold(III) from aqueous tetrachloroauric acid solution using immobilized Pseudomonas saccharophila was investigated. The effect pH, cell amounts on gold removal, the time course removal by P. cells, which removed large a containing hydrogen tetrachloroauric(III) were reported in detail. Additionally, to approve amount recovery much higher, biosorption...

The usage of inefficient techniques in artisanal gold mining is quite common, either to extract the ore or processing it, and related to environmental contamination. This paper analyse the mineral processing of a case study in Peru (San Cristobal) with the aim to improve the gold recovery process and the environmental impact. The process of amalgamation (gold-mercury) has been found as ineffect...

An azobenzene-containing surfactant was synthesized for the phase transfer of α-cyclodextrin (α-CD)-capped gold nanoparticles between water and toluene phases by host-guest chemistry. With the use of the photoisomerization of azobenzene, the reversible phase transfer of gold nanoparticles was realized by irradiation with UV and visible light. Furthermore, the phase transfer scheme was applied f...

As a noble metal, gold is considered the most popular material in electrocatalysis. In spite of that, this metal highly expensive manufacture low-cost appliances. present work, scrap gold, produced jewellery as waste, introduced resource to be recycled. A electrode was fabricated by connecting tablet shaped recycled with copper wire inserting into polytetrafluoroethylene (PTFE) tube. The manufa...

Numerous research studies have been done to improve the gold recovery methods and to fi nd alternative processing techniques in the last decade. The main goal in this search has become to design an effi cient plant employing environmentally acceptable processes today. For this purpose, the application of environmentally friendly, no chemical included techniques like centrifugal gravity separato...