Automotive catalysts represent a secondary source for precious metals recovery. These elements are usually obtained from minerals. Recently, methods have been sought to recover them waste materials. The main route consists of pyrometallurgical treatments at high temperatures with the generation other pollutants and very energy consumption. With hydrometallurgy, routes can be developed which fav...

Neodymium being an expensive strategic metal indispensable for our society, the key issue is to secure its supply and make usage sustainable. However, with less than 1% of it currently recycled, we are far from achieving this. Although some work underway recycle electrical engines’ large Nd-based magnet alloys, little attention has been given recycling small Nd-containing ceramic-based componen...

This work presents the results of synthesis granular copolymers acrylonitrile with hexahydro-1,3,5-triacrylyltriazine and their modification organic amines, in particular diethylamine, as well a study physicochemical characteristics sorption properties obtained ion exchangers. The result was exchangers necessary based on divinylbenzene, N,N´-methylene-bis-acrylamide hexahydro-1,3,5-triacrylyltr...

In a context of overexploitation natural resources, circular economy and particularly the extraction resources from secondary sources are essential to sustain number key technologies including renewable energies. Among sources, bauxite residue contains critical elements rare earth (REEs) (712 mg/kg). We investigated use soft selective dissolution protocols at mild pH values (2–6) as an alternat...

The hydrometallurgical method for processing chalcopyrite ore has gained enormous attention due to the environmental problems emanated by conventional pyrometallurgical route. Here, hydrometallurgy is considered an alternative that may be more of low-cost and environmentally friendly. Thus, alkaline leaching been effective, efficient, acceptable leachant dissolution. dissolution behaviour coppe...

Lanthanum and cobalt are Critical Raw Materials components of Solid Oxide Cells—SOCs electrodes. This review analyses lanthanum leaching from waste materials (e-waste, batteries, spent catalysts), aiming to provide a starting point for SOC recycling, not yet investigated. The literature was surveyed with specific interest leaching, the first phase hydrometallurgy recycling. Most references (86%...