title: Recycling metals from wastes: a novel application of mechanochemistry.
abstract: Recycling metals from wastes is essential to a resource-efficient economy, and increasing attention from researchers has been devoted to this process in recent years, with emphasis on mechanochemistry technology. The mechanochemical method can make technically feasible the recycling of metals from some specific wastes, such as cathode ray tube (CRT) funnel glass and tungsten carbide waste, while significantly improving recycling efficiency. Particle size reduction, specific surface area increase, crystalline structure decomposition and bond breakage have been identified as the main processes occurring during the mechanochemical operations in the studies. The activation energy required decreases and reaction activity increases, after these changes with activation progress. This study presents an overall review of the applications of mechanochemistry to metal recycling from wastes. The reaction mechanisms, equipment used, method procedures, and optimized operating parameters of each case, as well as methods enhancing the activation process are discussed in detail. The issues to be addressed and perspectives on the future development of mechanochemistry applied for metal recycling are also presented.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
authors.forename: Quanyin
authors.initials: Q
authors.lastname: Tan
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
authors.forename: Jinhui
authors.initials: J
authors.lastname: Li
mesh_terms: D055984:Cathode Ray Tube; D055598:Chemical Phenomena; D059029:Electronic Waste; D005898:Glass / Q000737:chemistry; D055595:Mechanical Phenomena; D008670:Metals / Q000302:isolation & purification*; D059027:Recycling / Q000379:methods*
chemical_list: D008670:Metals