COMPARISON OF CYANIDE AND THIOSULPHATE LEACHING FOR GOLD PRODUCTION (A Literature Review)
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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 wastes represents a pr...
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The implementation of more stringent regulations and the recent development of the International Cyanide Management Code (ICMC) by the industry is aimed at avoiding future environment incidents with cyanidation plants. To meet the ICMC discharge to tailings requirements and/or regulations, many operations now adopt cyanide recovery or destruction processes. In Australia, there is also the repor...
متن کاملThe isolation of rhodanese from Pseudomonas aeruginosa by affinity chromatography.
Rhodanese (thiosulphate : cyanide sulphur-transferase; EC 2 . 8 . I . I) was originally ,described by Lang (1933). The enzyme catalyses the formation of thiocyanate from cyanide and thiosulphate according to the reaction : S20!+ CN-+ SCN+ SO:-. Rhodanese activity has been demonstrated in most mammalian tissues, with the greatest activity present in liver and kidney. The enzyme has been purified...
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Leber's hereditary optic neuropathy is a rare cause of progressive visual failure. Its cause is unknown, but one hypothesis is that patients have a defect in the detoxication of cyanide. One of the enzymes used in this detoxication is thiosulphate sulphurtransferase (rhodanese). The activity of this enzyme was measured in the rectal mucosa of a group of subjects with Leber's hereditary optic ne...
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Introduction Cyanide is a ubiquitous and potent cytotoxic agent known for its rapid lethal action and toxicity. The sources for cyanide poison are diverse, ranging from fruit pits, nuts, or seeds to industrial-based materials, such as those used in metal processing, electroplating, rubber and plastic production, insecticide and rodenticide production, chemical synthesis, and extraction of gold ...
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