Leaching Kinetics of Valuable Metals

Ubaldini, Stefano

doi:10.3390/met11010173

Cited by 5 publications

(1 citation statement)

References 11 publications

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“…Note that the ultimate goal for those processes is usually to obtain pure copper/nickel, while palladium is simply recovered (along with other PGMs). Leaching is a process of extracting valuable metals from solid phase using liquid solvents [ 48 ]. Due to the unique properties of PGMs, mainly their high chemical resistance, they can be separated from nickel without much effort, usually by leaching nickel while leaving PGMs intact in the solid residue [ 49 ].…”

Section: Production Of Palladium From Primary Sourcesmentioning

confidence: 99%

Production, Recycling and Economy of Palladium: A Critical Review

Michałek,

Hessel,

Wojnicki

2023

Materials

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Platinum group metals (PGMs), including palladium, play a pivotal role in various industries due to their unique properties. Palladium is frequently employed in technologies aimed at environmental preservation, such as catalytic converters that reduce harmful emissions from vehicles, and in the production of clean energy, notably in the hydrogen evolution process. Regrettably, the production of this vital metal for our environment is predominantly centered in two countries—Russia and South Africa. This centralization has led to palladium being classified as a critical raw material, emphasizing the importance of establishing a secure and sustainable supply chain, as well as employing the most efficient methods for processing materials containing palladium. This review explores techniques for palladium production from primary sources and innovative recycling methods, providing insights into current technologies and emerging approaches. Furthermore, it investigates the economic aspects of palladium production, including price fluctuations influenced by emission regulations and electric vehicle sales, and establishes connections between palladium prices, imports from major producers, as well as copper and nickel prices, considering their often co-occurrence in ores.

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Section: Production Of Palladium From Primary Sourcesmentioning

confidence: 99%

Production, Recycling and Economy of Palladium: A Critical Review

Michałek,

Hessel,

Wojnicki

2023

Materials

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Weak acid leaching of uranium ore from a high carbonate uranium deposit

Chen

Wei

Liu

et al. 2022

J Radioanal Nucl Chem

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Mineralogical study showed that the Yuejin uranium ore is from a low grade, high carbonate and high pyrite sandstone type uranium deposit. Uranium leaching rate, uranium speciation of leachate, leaching kinetics and precipitation analysis were investigated under the conditions of different acidity, liquid–solid ratio and H2O2 concentration. The test results showed that the weak acid leaching process can be used to develop high carbonate type uranium deposits, however, because of the high content of pyrite, other oxidants except high concentration H2O2 need to be considered.

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