Results 41 to 50 of about 20,439 (294)

Model-Free Adaptive Control of Hydrometallurgy Cascade Gold Leaching Process with Input Constraints

open access: yesACS Omega, 2023
Hydrometallurgy technology can directly deal with low grade and complex materials, improve the comprehensive utilization rate of resources, and effectively adapt to the demand of low carbon and cleaner production.
Shi-Du Dong   +4 more
semanticscholar   +1 more source

An electrochemical investigation of the formation of CoSx and its effect on the anodic dissolution of iron in ammoniacal-carbonate solutions [PDF]

open access: yes, 2013
It has been found that the co-presence of cobalt (II) and thiosulphate ions in ammoniacal-carbonate solutions promotes the passivation of iron, under conditions in which it would otherwise continue to dissolve anodically. Electrochemical experiments have
D'Aloya, A, Nikoloski, A.N.
core   +2 more sources

Lithium perrhenate catalyst for carbon aerogel-based supercapacitor

open access: yesSN Applied Sciences, 2020
Carbon aerogels are unique type of amorphous carbon-based materials with an extraordinary properties including light weight, well-developed and tailored pore structure, high specific surface area, low electrical resistivity and high purity.
Mateusz Ciszewski   +5 more
doaj   +1 more source

A robotic platform for high-throughput electrochemical analysis of chalcopyrite leaching [PDF]

open access: yes, 2015
A novel robotic platform for combinatorial screening of ionic liquid-based Cu extraction from chalcopyrite with real-time, in situ monitoring of dissolved copper.
Albrecht, T   +4 more
core   +1 more source

An Overview of Flashing Phenomena in Pressure Hydrometallurgy

open access: yesProcesses, 2023
Pressure hydrometallurgy has attracted much attention for its characteristics, such as the high adaptability of raw materials and environmental friendliness.
Junda Liu   +4 more
semanticscholar   +1 more source

Gold leaching from ores using biogenic lixiviants – A review

open access: yesCurrent Research in Biotechnology, 2022
The recovery of gold from different sources, such as ores and concentrates, commonly is carried out in industry using cyanidation because it has the advantage of high selectivity of gold over other elements.
Esmaeil Jorjani   +1 more
doaj   +1 more source

Jarosite stability on Mars [PDF]

open access: yes, 2005
Jarosite, a potassium (sodium) iron sulphate hydrated mineral, has recently been identified on the martian surface by the Opportunity rover. Using recent thermochemical data [Drouet and Navrotsky, 2003, Geochim. Cosmochim.
Drouet, Christophe   +2 more
core   +3 more sources

The Effect of the Redox Potential of Aqua Regia and Temperature on the Au, Cu, and Fe Dissolution from WPCBs

open access: yesRecycling, 2017
Constant growth in waste electrical and electronic equipment (WEEE) levels necessitates the development of new, commercially viable recycling processes.
Heini Elomaa   +6 more
doaj   +1 more source

Bridging Hydrometallurgy and Biochemistry: A Protein-Based Process for Recovery and Separation of Rare Earth Elements

open access: yesACS Central Science, 2021
The extraction and subsequent separation of individual rare earth elements (REEs) from REE-bearing feedstocks represent a challenging yet essential task for the growth and sustainability of renewable energy technologies.
Ziye Dong   +6 more
semanticscholar   +1 more source

Pyrite oxidation under initially neutral pH conditions and in the presence of Acidithiobacillus ferrooxidans and micromolar hydrogen peroxide [PDF]

open access: yes, 2012
Hydrogen peroxide (H2O2) at a micromolar level played a role in the microbial surface oxidation of pyrite crystals under initially neutral pH. When the mineral-bacteria system was cyclically exposed to 50 μM H2O2, the colonization of Acidithiobacillus ...
Lin, C., Ma, Y.
core   +2 more sources

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