2024
DOI: 10.1002/cssc.202400931
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Carbon Dioxide as a Sustainable Reagent in Circular Hydrometallurgy

Rodolfo Marin Rivera,
Koen Binnemans

Abstract: This review highlights the use of CO2 as a reagent in hydrometallurgy, with emphasis on the new concept of circular hydrometallurgy. It is shown how waste CO2 can be utilised in hydrometallurgical operations for pH control or regeneration of acids for leaching. Metal‐rich raffinate solutions generated after removal of the valuable metals can serve as feedstocks for mineral carbonation, providing alternative avenues for CO2 sequestration. Furthermore, CO2 can also be used as a renewable feedstock for the produc… Show more

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