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The high demand for advanced metallic materials raises the need for an extensive recycling of metals and such a sustainable use of raw materials. ""Sustainable Utilization of Metals - Processing, Recovery and Recycling"" comprises the latest scientific achievements in efficient production of metals and such addresses sustainable resource use as part of the circular economy strategy. This policy drives the present contributions, aiming on the recirculation of EoL-streams such as Waste Electric and Electronic Equipment (WEEE), multi-metal alloys or composite materials back into metal production. This needs a holistic approach, resulting in the maximal avoidance of waste. Considering both aspects, circular economy and material design, recovery and use of minor metals play an essential role, since their importance for technological applications often goes along with a lack of supply on the world market. Additionally, their ignoble character and low concentration in recycling materials cause an insufficient recycling rate of these metals, awarding them the status of “critical metals”. In order to minimize losses and energy consumption, this issue explores concepts for the optimization concerning the interface between mechanical and thermal pre-treatment and metallurgical processes. Such new approaches in material design, structural engineering and substitution are provided in the chapters.

n/a --- tramp element --- reuse --- titanium recovery --- smartphone --- electrolytic manganese --- chemical equilibrium diagram --- thermodynamics --- displays --- selective extraction --- negative activation energy --- rare earths --- precipitation --- yttrium --- melting behavior --- zinc --- Bayer process --- silver leaching --- lanthanum --- steel scrap --- waste utilization --- super-gravity --- solvent extraction --- scandium --- magnesium --- gravity separation --- dynamic material flow model --- electrolytic lodes and scrapings --- enrichment of Ti --- ammonium scandium hexafluoride --- carbothermal reduction --- simultaneous recovery --- karst bauxite --- fines --- vanadium --- silver --- oxygen-depolarized cathodes --- ionic liquids --- flotation --- steelmaking dust --- aluminium purification --- zinc recycling --- physical separation --- manganese --- intermetallic formation --- gold --- aluminum alloy --- copper --- slag valorization --- reduction of Co --- NMC batteries --- process development --- REE–Nb–Fe ore --- bauxite residue --- hydrometallurgy --- Zinc --- polythermal section --- alkaline leaching --- electric arc furnace --- neodymium --- environmentally friendly process --- electrodeposition --- volatilization --- characterization --- rheorefining --- Li-ion battery --- anti-solvent crystallization --- basic oxygen furnace --- Bayan Obo --- selective precipitation --- pyrolysis --- WPCBs --- cold-bonded briquettes --- separation --- battery pre-treatment --- dysprosium --- dust --- metal recovery --- pyrometallurgy --- thermal treatment --- jarosite --- lifetime of steel --- leaching --- rare-earths --- sustainable development --- industry sector --- closed-loop circulation --- circular economy --- iron removal --- kinetics --- polishing waste --- material flow analysis --- cerium --- rare earth elements --- recycling potential --- halogenation --- ultra-high purity --- cryogenic pre-treatment --- Tin recovery --- refining --- WPCB --- desulfurization --- spent catalysts --- trace elements --- dimethyl sulfoxide --- vacuum distillation --- industrial residue --- condensation --- glass polishing waste --- flash smelting --- red mud --- microwave assisted pyrolysis --- NdFeB magnets --- cavitation --- sludge --- cementation --- indium --- metallurgy --- recycling --- gallium --- copper removal --- jarosite residue --- preparation for recovery --- laterites --- scandium recovery --- blast furnace --- circulation --- recycling rate --- REE-Nb-Fe ore

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The proposed book is a compilation of a Special Issue on “Leaching of Rare Earth Elements from Various Sources”, published in the journal Minerals in 2020. There are 10 papers contributed by experts in the area, and these can be grouped into four categories: leaching from low-grade ores including coal, clay, soil, and red mud; pre-treatment and leaching; recycling; and precipitation and nano-hydrometallurgy. Although these articles are available in the journal Minerals, it is convenient to compile the most valuable information into a book form so that scholars and industrial practitioners can have easy access to it when they need it where the Internet is not easily available. I strongly believe that the book on a very specialized topic matter such as modern extraction technologies of rare earth elements will contribute greatly to the fast-growing industry that needs rare earth elements.

Technology: general issues --- precipitation --- leaching --- complexation --- anion effect --- equilibrium calculation --- rare earth elements --- magnets --- recycling --- recovery --- fluorides --- modelling --- clay minerals --- grain size characteristics --- in situ leaching --- simulated leaching --- ion-absorbed type rare earth ore --- coal --- acid mine drainage --- coal combustion byproducts --- kinetics --- apparent activation energy --- rare-earth elements --- scandium --- alumina production --- sinter processes --- red mud --- electrostatic precipitation dust --- alkali leaching --- lanthanide separation --- magnetic nanohydrometallurgy --- complexing nanoparticles --- magnetic nanoparticles --- magnetophoresis --- monazite processing --- urban mining --- REE --- sulfuric acid baking --- caustic digestion --- acid leaching --- water leaching --- coal utilization byproducts --- pregnant leach solution --- underclay --- organic acid --- rare earths --- distribution factor --- selective precipitation --- oxalates --- organic complexes

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Radiopharmaceuticals are used in the diagnosis and treatment of various diseases, especially cancer. In general, radiopharmaceuticals are either salts of radionuclides or radionuclides bound to biologically active molecules, drugs, or cells. Tremendous progress has been made in discovering, developing, and commercializing numerous radiopharmaceuticals for the imaging and therapy of cancer. Significant research is ongoing in academia and the pharmaceutical industry to develop more novel radiolabeled compounds as potential radiopharmaceuticals for unmet needs. This Special Issue aims to focus on all aspects of the design, characterization, evaluation, and development of novel radiolabeled compounds for the diagnosis and treatment of cancer and the application of new radiochemistry and methodologies for the development of novel radiolabeled compounds. Outstanding contributions presented in this Special Issue will significantly add to the field of radiopharmaceuticals.

Research & information: general --- Chemistry --- positron emission tomography (PET) --- pyrazoles --- fluorine-18 --- radionuclides --- PET probes --- imaging pharmaceuticals --- hypopharyngeal cancer --- 188Re-liposome --- repeated therapy --- NGS --- microRNA --- aprepitant --- radiopharmaceuticals --- neurokinin 1 receptor antagonist --- radionuclide chelators --- kidney uptake --- cleavable linkers --- neutral endopeptidase (NEP) --- renal brush border enzymes --- prostate-specific membrane antigen (PSMA) --- cancer imaging and therapy --- somatostatin analogs --- radiolabeling --- radionuclide therapy --- imaging --- adrenergic receptor --- positron emission tomography --- radiotracer --- cholecystokinin-2 receptor --- minigastrin --- molecular imaging --- targeted radiotherapy --- lutetium-177 --- EpCAM --- radionuclide --- SPECT --- iodine --- PIB --- breast --- cancer --- PET --- target-specific biomolecules --- immunoPET imaging pharmaceuticals --- production processes --- 124I-labeled monoclonal antibodies --- radiotracers --- AAZTA --- scandium-44 --- FAP --- SA --- DPP --- PREP --- radioiodine labeling --- radioiodination --- biomolecules --- peptides --- proteins --- monoclonal antibodies --- 123,124,125,131I-labeled molecules and biomolecules --- n/a