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The recent developments in the environmental applications of heterogenous catalysis and photocatalysis are described in this book, focusing on air and water purification using innovative and performing catalysts and applying new green and sustainable processes.

Technology: general issues --- Chemical engineering --- ceria --- pesticide --- photocatalysis --- photo-Fenton --- AOPs --- thin films --- ZnO --- doping --- heterogeneous photocatalysis --- VOCs --- bimetallic catalysts --- air purification --- catalytic combustion --- China --- elimination technology --- pharmaceutical industry --- advanced oxidation processes --- ozone --- ultraviolet --- bleaching --- fabrics --- industrial wastewater --- zero valent iron --- magnetite --- hematite --- alkali-activated material --- geopolymer --- blast furnace slag --- catalytic wet peroxide oxidation --- Fe-catalyst --- bisphenol A --- Mn-Zr solid solution --- toluene --- active oxygen --- combustion --- VOC --- photothermo catalysis --- ethanol --- manganese oxide --- zirconium oxide --- hydrothermal preparation --- co-precipitation --- CuFeS2 --- Fenton-like reaction --- degradation --- environmental water samples --- ciprofloxacin --- levofloxacin --- gC3N4 --- rGO --- Au nanoparticles --- n/a

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There are several major megatrends having an impact on pyrometallurgical metal processing. The steadily growing demand for all metals is strengthened by the emergence of electrical vehicles (EV), which brings a high need for battery metals, but additionally, a significant increase in copper consumption. Even if only moderate forecasts for the number of the EVs become true, production of the base metals must increase by tens of percentages, or even more than double. At the same time, pyrometallurgical processes have to produce fewer side products, such as slag, and maintain the quality level of the primary product, although raw material mixtures are increasingly complex and new elements are entering the processes in secondary raw materials. Therefore, it is imperative to continue the development of pyrometallurgical processes more efficiently and productively, while still improving their selectivity regarding slagging the unwanted material and recovering the desired elements. This Special Issue is for current advances in the pyrometallurgical processing of metals, including all aspects, namely, the basic unit processes and operations in a smelter, metallurgical engineering, furnace integrity, cooling systems, modelling, slag and offgas handling, to name a few. A collection of 13 papers deal with ferrous and ferroalloy development, and the processing of different raw materials for metal production.

Technology: general issues --- blast furnace slag --- TiO2 --- titanium carbonitride --- viscosity --- limonite --- magnetization reduction roasting --- rotary kiln --- deposit --- fayalite --- FeO --- liquid phase --- medium manganese steel --- spinel inclusions --- Ce treatment --- modification mechanism --- copper concentrate --- pyrometallurgy --- flash smelting --- combustion --- classification --- spectroscopy --- PCA --- SIMCA --- PLS-DA --- k-NN --- support vector machines --- scandium --- master alloys --- aluminum alloys --- metallothermy --- vacuum induction melting --- factsage --- nickel laterite --- non-melting reducing --- sodium chloride --- magnetic separation --- garnierite --- vacuum carbothermal reduction --- mechanism --- CaF2 --- recovery --- devolatilization --- torrefied biomass --- bio-coal --- volatile matter --- reduction --- blast furnace --- multistage and deep reduction --- low-oxygen high titanium ferroalloy --- inclusions --- melt separation --- slag-metal separation --- hearth drainage --- iron and slag flow --- interface phenomena --- CaO-SiO2-FetO-P2O5 slag system --- distribution ratio of phosphorus --- dephosphorization --- n·2CaO·SiO2-3CaO·P2O5 solid solution --- B2O3 --- vanadium–titanium sintering --- metallurgical properties --- microstructures --- Søderberg electrodes --- submerged arc furnace (SAF) --- ferro-alloy production --- ferrochrome --- electrical resistivity --- degree of graphitisation --- bulk density --- porosity --- compressive breaking strength