Gold leaching in cyanide-starved copper solutions in the presence of glycine

E-Waste Recycling and Resource Recovery: A Review on Technologies, Barriers and Enablers with a Focus on Oceania

“…The use of amino acids as a reagent for the leaching of base metals and precious metals has also been investigated [193][194][195][196][197]. Amino acids can effectively dissolve base and precious metals in alkaline environments, resulting in high yields.…”

“…In the PIR, lack of relevant technical knowledge has been identified as one of the largest barriers [52]. However, in Australia and New Zealand, this is less of a barrier due to the increasing presence of e-waste recycling facilities [37], and technical expertise associated with mining and mineral processing, including pyrometallurgy, hydrometallurgy and biohydrometallurgy [9,27,50,197,240]. Multiple first stage recycling facilities exist in Australia, and the New Zealand company Mint Innovation is testing an innovative and first-of-its kind pilot biohydrometallurgy-based recycling facility for e-waste [34,47,237].…”

Modelamiento estadístico de la lixiviación con cianuro de un mineral del municipio de Andes, Colombia, como alternativa al proceso de amalgamación

“…Por otro lado, en algunos minerales refractarios de oro y plata, la técnica de cianuración no es suficientemente eficaz, por lo que se han llevado a cabo ensayos de pretratamiento con hidróxido de potasio, a fin de adecuar el mineral en cuestión para mejorar la recuperación de oro (Alp et al, 2014). Igualmente, es conocido que, en minerales auríferos con determinados contenidos de cobre, se reduce la cantidad de oro que podría obtenerse con el proceso de cianuración (Oraby & Eksteen, 2015).…”

Niobium-Titanium-Based Photocatalysts: Its Potentials for Free Cyanide Oxidation in Residual Aqueous Effluent

“…The chemical inputs for extraction are mercury (Hg), sodium cyanide (NaCN), hydrogen peroxide (H 2 O 2 ), zinc and activated carbon; however, organic additives based on oil are used for the flotation process of the mineral pine, anthragenic oils or glycine, which pass into leachate waters (Eksteen and Oraby, 2015). Added to this are the formed amalgams that have between 40 and 50 wt % of Hg and between 50 and 60 wt % of other metals such as gold, silver, and copper (Ilyas and Lee, 2018).…”