Leaching Kinetics of Valuable Metals

• Other Authors: Ubaldini, Stefano (Editor)
• Format: Electronic Book Chapter
• Language: English
• Published: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute 2021
• Subjects: Research & information: general; eudialyte; rare earth elements; dry digestion; leaching; neural network; uranium; contaminated groundwater; permeable reactive barrier; zero-valent iron; Al-Ni alloys; aluminothermic reactions; reaction rate; Al master alloys; kinetics; Hydrometallurgical processes; Chalcopyrite; low-pressure leaching; mining waste; hydrometallurgical processes; leaching kinetic; thiosulphate leaching; electrowinning; gold; waste printed circuit board; iodide; iodine; ascorbic acid; precipitation; thiosulfate oxidation; catalysis; oxygen; high alumina fly ash; desilication rate; physical-chemical activation; alumina silica mass ratio; refractory gold concentrate; resources depletion; reducing harmful emissions; arsenic; nitric acid; shrinking core model; pyrite; arsenopyrite; clays; nanoscale zero-valent iron; groundwater; wastewater; geochemical characteristics; pitchblende; U neutral leaching; ELZPA ore deposit in Pakistan; n/a
• Online Access: DOAB: download the publication; DOAB: description of the publication

Leaching is a primary extractive operation in hydrometallurgical processing, by which a metal of interest is transferred from naturally occurring minerals into an aqueous solution. In essence, it involves the selective dissolution of valuable minerals, where the ore, concentrate, or matte is brought into contact with an active chemical solution known as a leach solution. Currently, the hydrometallurgical processes have a great number of applications, not only in the mining sector-in particular, for the recovery of precious metals-but also in the environmental sector, for the recovery of toxic metals from wastes of various types, and their reuse as valuable metals, after purification. Therefore, there is an increasing need to develop novel solutions, to implement environmentally sustainable practices in the recovery of these valuable and precious metals, with particular reference to critical metals; those included in materials that are indispensable to modern life and for which an exponential increase in consumption is already a reality, or will be in a short-term perspective. For publication in this Special Issue, consideration has been given to articles that contribute to the optimization of the kinetic conditions of innovative hydrometallurgical processes-economic and of low environmental impact-applied to the recovery of valuable and critical metals.