fungal pretreatment of sulfides in refractory gold

fungal pretreatment of sulfides in refractory gold

Fungal pretreatment of sulfides in refractory gold ores ...

Changes in sulfide sulfur concentration and the formation of oxide phases during fungal treatment were confirmed using Raman spectroscopy and X-ray diffraction analysis. These results suggest that P. chrysosporium is a potential microorganism for oxidative decomposition of metal sulfides associated with refractory gold ores.

Fungal pretreatment of sulfides in refractory gold ores ...

2011-5-1 · title = "Fungal pretreatment of sulfides in refractory gold ores", abstract = "This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold ores.

Fungal pretreatment of sulfides in refractory gold ores ...

Request PDF | Fungal pretreatment of sulfides in refractory gold ores | This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a ...

Fungal pretreatment of sulfides in refractory gold ores.

This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold ores. The extent of biotransformation was monitored by analyzing for iron, sulfur and arsenic in incubation solutions, and for sulfide sulfur in the residual...

Fungal pretreatment of sulfides in refractory gold ores ...

Abstract This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold ores. The extent of biotransformation was monitored by analyzing for iron, sulfur and arsenic in incubation solutions, and for sulfide sulfur in the ...

fungal pretreatment of sulfides in refractory gold

2018-6-17 · Fungal pretreatment of sulfides in refractory gold ores ... 01/05/2011 1. Introduction. In sulfidic refractory gold ores, tiny gold particles typically . 1 μm (Marsden and House, 2006) may be highly disseminated and locked up within the grain boundaries or fractures of sulfide minerals such as pyrite and arsenopyrite.Thus, decomposition of the sulfides is required to liberate the gold (Baako ...

10.1016/j.mineng.2011.02.020 | DeepDyve

2020-6-11 · The results demonstrate that the fungus, P. chrysosporium , is a potential microorganism for oxidative decomposition of metal sulfides associated with refractory gold ores. With improvement in system controls, higher levels of oxidation are feasible.

Sequential pretreatment of double refractory gold ore ...

2019-7-1 · Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM) from white-rot fungus Phanerochaete chrysosporium.The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%. . Additionally, the crude lignin-degrading

Mycohydrometallurgy: Biotransformation of double ...

2013-5-1 · Double refractory gold ores require pretreatment before gold cyanidation. • Single-stage biotreatment of double refractory gold ore (DRGO) is yet to be a success. • P. chrysosporium simultaneously biotransformed sulfides and carbonaceous matter. • Gold recovery increased substantially after fungal treatment. •

Fungal pretreatment of sulfides in refractory gold ores ...

Abstract This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold ores. The extent of biotransformation was monitored by analyzing for iron, sulfur and arsenic in incubation solutions, and for sulfide sulfur in the ...

fungal pretreatment of sulfides in refractory gold

2018-6-17 · Fungal pretreatment of sulfides in refractory gold ores ... 01/05/2011 1. Introduction. In sulfidic refractory gold ores, tiny gold particles typically . 1 μm (Marsden and House, 2006) may be highly disseminated and locked up within the grain boundaries or fractures of sulfide minerals such as pyrite and arsenopyrite.Thus, decomposition of the sulfides is required to liberate the gold (Baako ...

Pretreatment of Refractory Gold Ores Using Cell-Free ...

Request PDF | Pretreatment of Refractory Gold Ores Using Cell-Free Extracts of P. chrysosporium : A Preliminary Study | The fungus Phanerochaete chrysosporium has been proven to biotransform ...

Sequential pretreatment of double refractory gold ore ...

Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM)from white-rot fungus Phanerochaete chrysosporium. The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%.

Microbial pre-treatment of double refractory gold ores ...

Increase in gold extraction as a result of carbon degrading microbial pretreatment following sulphide oxidation of double refractory gold ores has also been observed by other workers (Amankwah et ...

高硫卡林型金精矿中碳质表征及其对生物预氧化提金的影响

2016-12-22 · Ofori-Sarpong G, Osseo-Asare K, Tien M. Fungal pretreatment of sulfides in refractory gold ores. Miner Eng, 2011, 24(6):499 [7] Ofori-Sarpong G, Osseo-Asare K. Preg-robbing of gold from cyanide and non-cyanide complexes:effect of fungi pretreatment of [8]

Sequential pretreatment of double refractory gold ore ...

Abstract Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM) from white-rot fungus Phanerochaete chrysosporium. The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%.

Biotechnological Approaches to Facilitate Gold Recovery ...

2020-10-30 · Double refractory gold ore (DRGO) not only include ppt levels of gold grains locked in sulfide minerals but also a problematic amount of carbonaceous matter. This causes a significant recovery loss of gold during cyanidation because of the strong affinity of the Au(CN)2− with the carbonaceous matter. Combustion decreases the carbonaceous matter content, but also emits

[PDF] A two-stage bacterial pretreatment process for ...

Double refractory gold concentrates were subjected a two-stage microbial process to destroy both sulfides and carbonaceous matter. In the first stage, the well-known sulfide biooxidation process, which utilizes chemolithotrophic bacteria was used to oxidize sulfides and in the second stage carbonaceous matter is destroyed using the bacterium Streptomyces setonii.

某复杂银精矿提金、银工艺研究-《有色金属科学与工程》

2013-12-31 · [12] Ofori Sarpong G,Osseo Asare K,Tien M. Fungal pretreatment of sulfides in refractory gold ores[J].Minerals Engineering,2011(24):499-504. [13] 尚鹤,温建康,武彪,等.含砷碳质难处理金矿生物预氧化-氰化浸出研究[J].稀有金属,2012,36(6

Fungal pretreatment of sulfides in refractory gold ores

Fungal pretreatment of sulfides in refractory gold ores G. Ofori-Sarponga,⇑, K. Osseo-Asarea,b, M. Tienc a Department of Energy and Mineral Engineering, Penn State University, University Park, PA 16802, USA bDepartment of Materials Science and Engineering, Penn State University, University Park, PA 16802, USA cDepartment of Biochemistry and Molecular Biology, Penn State University ...

Sequential pretreatment of double refractory gold ore ...

Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM)from white-rot fungus Phanerochaete chrysosporium. The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%.

Sequential pretreatment of double refractory gold ore ...

Abstract Double refractory gold ore was sequentially pretreated to oxidize sulfides by thermophilic archaeon Acidianus brierleyi and then to decompose carbonaceous matters using the cell-free spent medium (CFSM) from white-rot fungus Phanerochaete chrysosporium. The pretreatment by A. brierleyi significantly improved the gold recovery from 25% to 77%.

Pretreatment of Refractory Gold Ores Using Cell-Free ...

The fungus Phanerochaete chrysosporium has been proven to biotransform refractory gold ores, leading to increase in gold recovery. This transformation has been attributed to enzymes secreted by the microbe. This paper reports the findings of preliminary

Refractory Gold Ore And Pretreatment

Refractory Gold Ore And Pretreatment. FOB Reference Price:Get Latest Price Pretreatment of refractory gold ore. Pretreatment Process on Refractory Gold Ores with As Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80 even after fine grinding.

Fungal-transformation of surrogate sulphides and ...

Refractory gold ores contain metal sulphides that encapsulate gold and prevent its dissolution by cyanide, and carbonaceous matter (CM) that adsorbs (or preg-rob) gold cyanide complex during cyanidation. Pretreatment is therefore a necessary step to decompose the sulphides and liberate gold before cyanidation, and to deactivate CM and prevent it from adsorbing dissolved gold.

WO2009069005A2 - Microbial pre-treatment of double ...

The present invention is directed to recovery of gold from refractory and double refractory ores using a fungal agent and/or culture media. The fungal agent is inoculated in the feed material to either decompose sulfide sulfur or deactivate preg robbing carbon The culture media is applied, m the absence of a microbe, to decompose some sulfide sulfur and release a portion of the gold.

Ming Tien | The Huck Institutes

Fungal pretreatment of sulfides in refractory gold ores G. Ofori-Sarpong, K. Osseo-Asare, M. Tien, 2011, Minerals Engineering on p. 499-504

[PDF] A two-stage bacterial pretreatment process for ...

Double refractory gold concentrates were subjected a two-stage microbial process to destroy both sulfides and carbonaceous matter. In the first stage, the well-known sulfide biooxidation process, which utilizes chemolithotrophic bacteria was used to oxidize sulfides and in the second stage carbonaceous matter is destroyed using the bacterium Streptomyces setonii.

某复杂银精矿提金、银工艺研究

2013-8-17 · Ofori Sarpong G, Osseo Asare K, Tien M. Fungal pretreatment of sulfides in refractory gold ores[J]. Minerals Engineering, 2011(24): 499–504. [13] 尚鹤, 温建康, 武彪, 等. 含砷碳质难处理金矿生物预氧化-氰化浸出研究[J]. 稀有金属, 2012, 36(6): 952–955. [14]