Dissolution of Gold and Silver with Ammonium Thiosulfate from Mangano-Argentiferous Ores Treated in Acid-Reductive Conditions
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DOI: 10.1007/s11837-017-2338-2
Abstract: A novel process was studied to extract economic metals from refractory ores that are difficult to leach with cyanide and ammonium thiosulfate, such as the well-known mangano argentiferous minerals, which are minerals of manganese, iron,… read more here.
Keywords: thiosulfate; ammonium thiosulfate; gold; spectroscopy ... See more keywords
Effect of thiosulfate on rapid start-up of sulfur-based reduction of high concentrated perchlorate: A study of kinetics, extracellular polymeric substances (EPS) and bacterial community structure.
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DOI: 10.1016/j.biortech.2017.07.045
Abstract: Perchlorate (ClO4-) contamination is more and more concerned due to the hazards to humans. Based on the common primary bacterium (Helicobacteraceae) of both thiosulfate-acclimated sludge (T-Acc) and sulfur-acclimated sludge (S-Acc) for perchlorate reduction, the rapid… read more here.
Keywords: reduction; start; thiosulfate; perchlorate ... See more keywords
Sodium thiosulfate enhances production of polysaccharides and anticancer activities of sulfated polysaccharides in Antrodia cinnamomea.
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DOI: 10.1016/j.carbpol.2019.04.017
Abstract: Sulfated polysaccharides (SPSs) are polysaccharides (PSs) with high sulfate functionalization and possess bioactivities. This study aimed to increase the sulfate content of SPSs in Antrodia cinnamomea through sulfate feeding. Feeding A. cinnamomea with sodium thiosulfate… read more here.
Keywords: antrodia cinnamomea; sulfated polysaccharides; sodium thiosulfate; thiosulfate ... See more keywords
A novel strategy using persulfate activated with thiosulfate for strong enhancement of trace 2,2′-dichlorobiphenyl removal: Influencing factors, and mechanisms
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DOI: 10.1016/j.cej.2021.128969
Abstract: Abstract Efficient and environmentally friendly methods for the remediation of polychlorinated biphenyls (PCBs)-contaminated wastewater have become an important issue. In this study, persulfate (PS) was activated with sodium thiosulfate (TS) to degrade 2,2'-dichlorobiphenyl (DCB) at… read more here.
Keywords: persulfate activated; system; removal; thiosulfate ... See more keywords
Free sulfurous acid (FSA) inhibition of biological thiosulfate reduction (BTR) in the sulfur cycle-driven wastewater treatment process.
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DOI: 10.1016/j.chemosphere.2017.02.117
Abstract: A sulfur cycle-based bioprocess for co-treatment of wet flue gas desulfurization (WFGD) wastes with freshwater sewage has been developed. In this process the removal of organic carbon is mainly associated with biological sulfate or sulfite… read more here.
Keywords: reduction; thiosulfate; treatment; btr ... See more keywords
A review of factors affecting gold leaching in non-ammoniacal thiosulfate solutions including degradation and in-situ generation of thiosulfate
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DOI: 10.1016/j.hydromet.2018.02.016
Abstract: Abstract Cyanide has been used for more than a century as a preferred lixiviant for extracting gold from ores and concentrates. While cyanide is very effective in treating certain ores and concentrates, it is not… read more here.
Keywords: thiosulfate; thiosulfate solutions; ores concentrates; gold ... See more keywords
Eco-friendly leaching of gold from a carbonaceous gold concentrate in copper-citrate-thiosulfate solutions
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DOI: 10.1016/j.hydromet.2019.105204
Abstract: Abstract Thiosulfate is considered to be one of the most promising alternative reagents to cyanide due to its non-toxicity and excellent leaching efficiency. However, the use of ammonia as the additive and high reagent consumption… read more here.
Keywords: citrate thiosulfate; thiosulfate; gold; copper citrate ... See more keywords
Use of dry grinding process to increase the leaching of gold from a roasted concentrate containing hematite in the thiosulfate system
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DOI: 10.1016/j.hydromet.2021.105582
Abstract: Abstract Iron-containing oxides are the main minerals associated with roasted gold concentrates. The influence of different iron-containing oxides on the gold thiosulfate leaching process is very complex. In this study, we found the use of… read more here.
Keywords: use dry; wet grinding; thiosulfate; dry grinding ... See more keywords
Environmentally friendly extraction of gold from refractory concentrate using a copper – ethylenediamine – thiosulfate solution
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DOI: 10.1016/j.jclepro.2019.01.007
Abstract: Abstract The growing environmental concerns associated with the use of cyanides and their toxicity have led to the prohibition of cyanidation-based gold leaching in many countries, necessitating the search for other extraction methods. Herein, we… read more here.
Keywords: ethylenediamine thiosulfate; copper ethylenediamine; thiosulfate; extraction ... See more keywords
Eco-friendly and economical gold extraction by nickel catalyzed ammoniacal thiosulfate leaching-resin adsorption recovery
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DOI: 10.1016/j.jclepro.2019.06.182
Abstract: Abstract Nickel catalyzed ammoniacal thiosulfate leaching-resin adsorption recovery, an environmentally friendly and cost-effective process, was developed to extract gold from a gold concentrate calcine. The catalytic mechanism was presented based on thermodynamic analysis that NH… read more here.
Keywords: gold; nickel catalyzed; ammonia; thiosulfate ... See more keywords
Hexaamminecobalt(III) catalyzed thiosulfate leaching of gold from a concentrate calcine and gold recovery from its pregnant leach solution via resin adsorption
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DOI: 10.1016/j.mineng.2021.107079
Abstract: Abstract Co(II) is effective in catalyzing gold thiosulfate leaching, but Co(III) has seldom been adopted directly as the catalyst. This paper examined the effect of hexaamminecobalt(III) on the thiosulfate leaching of gold from a concentrate… read more here.
Keywords: resin adsorption; thiosulfate; thiosulfate leaching; recovery ... See more keywords