The toxic cyanides in gold cyanide residues produced the cyanidation process of extraction threaten environmental safety and inhibit recovery valuable metals. In this study, removal through persulfate-advanced oxidation was investigated, heat activation ultrasonic were tested for removal. results showed that residue could be removed by 2.0 wt.% potassium persulfate at pH 10.0 after 60 min react...

The naturally occurring carbonaceous material (CM) in gold bearing ores often exhibits strongpreg-robbing properties. It can adversely affect the process of gold recovery during the cyanidation due to its ability to adsorb, or preg-rob gold from the cyanide leach solution. Treatments of carbonaceous ores with chemical surfactants as blinding agents to limit pregrobbing have shown promising resu...

Over the years, use of new alternative lixiviants for gold extraction has been investigated to overcome environmental concerns resulting from cyanidation process. Moreover, with global economic factors causing a decline in prices, it is crucial that novel hydrometallurgical methods extracting minimise operational costs by using low-priced reagents such as thiosulfate. In current study, response...

The South African gold mining industry has a legacy of abundant tailings dams, which have attracted the attention investors because their potential as cheaper secondary resource. In this we investigate study recovery from refractory calcine dam. Bulk mineralogy indicated silicates and iron oxides to be most phases. Scanning Electron Microscopy (SEM) showed exist in submicrometre micrometre size...

The current paper introduces for the very first time recently invented electrodeposition-redox replacement (EDRR) method in continuous leaching-recovery-solution purification process. mini-pilot study reveals that longer duration of EDRR process is beneficial as it increases gold recovery per stage and decreases specific energy consumption EDRR. This extraordinary behavior postulated to be inhe...

Artisanal and small-scale gold mining (ASGM) sector employs about 80% of the workforce but only contributes 20-30% Ghana’s production. The low production is linked to recoveries associated with activities because ofinadequate understanding chemical, mineralogical metallurgical characteristics ores. This study examined typical tailings understand their grinding characteristics, deportment cyanid...

Bio-cyanidation, as a sustainable and effective method to extract gold from primary secondary resources, has attracted attention because of its environmental friendliness economic benefits. The effect amino acids on bio-cyanide production using Bacillus megaterium (B. megaterium) is less explored area in this field the main interest study. Here, glycine, threonine, glutamine over concentration ...

The purpose of the present study is to evaluate mass fractions group noble metals (gold, silver, platinum, ruthenium, osmium, palladium, iridium, rhodium) in ores and host rocks Pioneer deposit (the Upper Amur Region, Russia) determine their migration activity hydrochemical classification ore by sizes. object primary oxidized ores, as well hosting this mineralization. employs method quantitativ...

Abstract Electronic waste is a dominant global issue with over 50 million tons generated annually. Still, as an amalgamation of precious and rare raw materials, electronic considerable economic resource the most valuable components located on printed circuit boards. Gold widely used in electronics numerous applications, although principally for contact points external connectors. The recovery g...