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Co-intensification of cyanide leaching gold by mercury ions and oxidant LI Qian(李 骞), JIANG Tao(姜 涛), YANG Yong-bin(杨永斌), LI Guang-hui(李光辉), GUO Yu-feng(郭宇峰), QIU Guan-zhou(邱冠周) School... of gold in cyanide solution of higher concentration is controlled by surface reaction. Small quantity of additions of mercury ions bring about great increases in anodic gold dissolution rate......
solution which accounts for more than 98% of total copper and cyanide (it may vary in a slight extent depending on the formation constants chosen for the copper cyanide complex species) [15... of anions hydration. According to the ion-exchange mechanism (reaction (2)), hydroxyl ions will be released into the aqueous phase when copper cyanide complexes are extracted into the organic phase (i.e.......
[6, 7] and sulfide ions also has a significant effect on the dissolution of gold in cyanide solution [8]. When gold is extracted from copper-bearing gold ore by cyanidation, the presence of copper... cyanide and oxygen in interaction with gold. As a result, the leaching rate of gold is lowered. In addition, the dissolution of copper sulfide produces a certain amount of sulfide ions [16]. These sulfide......
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Enrichment of copper and recycling of cyanide from copper–cyanide waste by solvent extractionTeng-yue Gao1,Kui-ren Liu1,Qing Han1,Bin-shi Xu21. Key Laboratory of Ecological Utilization of Multi-metal..." name="ChDivSummary">The enrichment of copper from copper–cyanide wastewater by solvent extraction was investigated using a quaternary ammonium salt as an extractant. The influences of important......
, such as sulfur dioxide [15], ozone [16,17], hydrogen peroxide [18], and iron/copper precipitation processes [19] are also commonly used for cyanide destruction in practice. However, these methods have..., the complex nature of cyanide wastewater, primarily the high concentrations of cyanide, may seriously restrict their industrial application. Efficient thermal decomposition or destruction of cyanides......
Synthesis of ultrafine copper particles by complex-reduction-extraction method YANG Jian-guang(杨建广), YANG Sheng-hai(杨声海), TANG Chao-bo(唐朝波), HE Jing(何 静),TANG Mo-tang(唐谟堂) School..., the formation of copper-ligands in aqueous solution causes initial copper ions concentration very low, which is not only good to obtain homogeneous initial reaction solution, but also slower......
from these earlier studies that the chemistry of ammoniacal cyanide leaching is rather complex with intimate interactions among the species of ammonia, copper and cyanide. The presence of copper...Trans. Nonferrous Met. Soc. China 25(2015) 597-607 Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching A. D. BAS, E. KOC, Y. E. YAZICI, H......
sources of undesirable forms of cyanide ion wastewater. Cyanide compounds present in environmental matrices and waste streams as simple and complex cyanides, cyanates and nitriles [4]. Therefore..., adsorption is an attractive process, in view of its efficiency and easiness. The adsorption is one of the suitable methods for the removal of cyanide ions with high removal efficiencies. Adsorption......
