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The development of porous materials has attracted the attention of the research community for years. Porosity characteristics have specific impacts on the material properties and materials that are applied in many areas, such as pollutant removal, CO2 capture, energy storage, catalytic oxidation and reduction processes, the conversion of biomass to biofuels, and drug delivery. Examples of porous materials are activated carbons, clays, and zeolites. The aim of this book is to collect the recent advances and progress regarding porous materials and their applications in the environmental area.

spherical seeds --- spherical activated carbons --- activation --- microporosity --- mechanical properties --- diatomite --- zeolite X --- hydrothermal method --- calcium ion exchange capacity --- clay minerals particles --- orientational anisotropy --- granular systems --- disk packing --- X-Ray microtomography --- mesoscale simulation --- water produced --- adsorbent materials --- composite --- AlFe-pillared clay --- CrCeOx --- chlorobenzene --- catalytic combustion --- temperature-programmed reaction --- lignite --- porous structure --- carbon dioxide --- pressure --- CuCl/AC adsorbent --- CO adsorption --- monolayer dispersion --- isosteric heat --- adsorption isotherms --- Fischer–Tropsch --- supported iron oxide --- supported cobalt oxide --- reducibility --- dispersion --- biosorption --- weed --- methylene blue dye --- natural biosorbents --- adsorption kinetics

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Metal nanoparticles/polymers hybrid materials have significantly contributed to the develop of nanotechnology. Moreover, these hybrid materials can respond to stimuli (e.g., pH, temperature, light, magnetic field) or self-degrade in a controlled manner to release metal nanoparticles or therapeutics encapsulated. Functional and structural hybrid materials provide opportunities for creative fields, remarkable properties, and future advanced applications. This Special Issue focuses on highlighting the progress of new hybrid materials, based on metal nanoparticles and polymers, their design, preparation, functionalization, characterization, and advanced applications.

Technology: general issues --- History of engineering & technology --- Mining technology & engineering --- alginate --- non-chloride in situ preparation --- nano-cuprous oxide --- flame-retardant --- mechanism --- nanoparticles --- polyethylene glycol --- Tween 80 --- cytotoxicity --- hemotoxicity --- primary cell culture --- medical applications --- SERS --- PMMA --- AgNPs --- in-situ --- adenosine --- methylene-blue --- smart hybrid materials --- properties of nanoparticles–reinforced polymers --- biotechnology --- cellulose acetate --- porosity --- ionic radius --- water-pressure --- silver nanoparticles --- nanocellulose --- engineered nanomaterials --- water monitoring --- water treatment --- ecosafety --- ecotoxicology --- eco-design --- polymersomes --- vesicles --- drug-delivery --- ultrafast laser --- plasmonic --- nanobubble --- fragmentation --- zero valent copper --- Cu0-containing hybrid anion exchanger --- Cu2O reduction --- ascorbic acid as reducer --- n/a --- properties of nanoparticles-reinforced polymers

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With the increasing global usage of water and the continuous addition of contaminants to water sources, new challenges have arisen that are associated with the abatement of organic pollutants, particularly those that are refractory to conventional water and wastewater treatment technologies. Advanced oxidation processes (AOPs) present a competitive alternative to promote the oxidation of organic contaminants by strong oxidative radicals generated from oxygen, ozone, wet peroxide, and UV radiation. The use of catalysts not only improves efficiency but may present remarkable cost advantages for practical applications of AOPs in the abatement of several pollutants. In this Special Issue of Catalysts, we invite authors to submit original research papers focused on the synthesis and characterization of novel heterogeneous catalysts and their uses in advanced oxidation processes for the removal of organic pollutants from aqueous solutions.

Technology: general issues --- History of engineering & technology --- CdS --- Bi2MoO6 microspheres --- antibiotic removal --- charge separation --- visible-light-driven --- carbon xerogel --- carbon nanotubes --- activated carbon --- adsorption --- catalytic wet peroxidation --- heterogeneous Fenton’s oxidation --- p-nitrophenol --- magnetic materials --- chemical vapour deposition --- photocatalytic ozonation --- organic pollutants --- advanced oxidation process --- wastewater treatment --- contaminants of emerging concern --- pharmaceuticals --- environmental catalysis --- biochar --- iron mineral --- heterogeneous catalysts --- antibiotic --- advanced oxidation processes --- water treatment --- Fenton reactions --- LCA --- environmental impact --- Fenton --- photocatalysis --- visible light --- SBA15 --- magnetite --- graphene --- tin oxide --- antimony doped tin oxide --- electrochemical oxidation --- atomic layer deposition --- TiO2-SiO2 --- immobilized photocatalyst --- methylene blue adsorption --- metal-free carbon catalysts --- N, S-co-doping --- catalytic wet air oxidation --- n/a --- heterogeneous Fenton's oxidation

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The progress of society has led to an improvement of the quality of life of a significant number of people. On the other hand, anthropogenic pollution dramatically increased, with serious consequences for the environment and human health. Controlling and remedying environmental pollution is one of the main challenges of our century. Fundamental and applicative research are called to collaborate, involving scientists in the development of realistic and effective systems for the prevention and the removal of pollutants from the environment. Spreading knowledge is among the missions of researchers and this is the aim of this book, offering an updated view on innovative materials and methods for pollutant treatment. It is composed of 18 articles, among them 5 reviews and 13 original articles, dedicated to new adsorbent materials (inorganic, organic, and hybrid materials) for the capture of pollutant species and for their catalytic conversion into non-toxic substances, and to bioremediation approaches to treat contaminated media. Water, air, and soil pollution was investigated, both at the lab and large scale, with special relevance for wastewater treatments for the removal of heavy metals and organic pollutants. We are grateful to “Molecules” for the opportunity to edit the Special Issue on “Innovative Materials and Methods for the Removal of Pollutants from the Environment”. We created, for this book, an original cover image, dedicated to the efforts of chemistry to defend the beauty of environment, represented by flowers, against every prejudice that considers chemistry an enemy of life.

Research & information: general --- Environmental economics --- Pollution control --- green-removal --- tangerine peels activated carbon --- agriculture waste --- acetamiprid pesticide --- enzymatic hydrolysis lignin --- sequential dissolution fractionation --- methylene blue adsorption capacity --- CuFe2O4 nano-particles --- CuFe2O4/PANI composite --- mercury (II) removal --- adsorption --- biochar --- pyrolysis --- heavy metals --- soil remediation --- bioavailability --- biomass waste --- N doped carbon dots --- Cd (II) --- mechanism --- water remedy --- green adsorbents --- pineapple leaves --- rose bengal (RB) dye --- face-centered central composite design (FCCCD), percentage removal (%R) --- adsorption capacity (qe) --- phosphorus removal --- toxic metals --- alginate beads --- sewage sludge --- BC --- sequential extraction --- copper --- carbon-silicon interaction --- bioremediation --- toxic pollutants --- extreme conditions --- extremophilic microorganism --- non-thermal plasma (NTP) --- exhaust emission --- internal combustion engine --- ion chemical reaction --- insensitive munitions --- 3-nitro-1,2,4-triazol-5-one (NTO) --- industrial wastewater --- vetiver grass --- phytoremediation --- phytoextraction --- ammonia --- ammonium recovery --- Freundlich --- intraparticle diffusion --- isoelectric state --- Langmuir --- pseudo-second-order --- Temkin --- zeolite --- high-strength wastewater --- sludge liquor --- chitosan --- adsorbent --- carbon --- graphene oxide --- silica --- magnetic separation --- dyes --- Langmuir isotherm --- breakthrough curve --- defluoridation --- up-flow mode --- volcanic rocks --- toluene --- rhodamine B --- water stability of monolith --- nanosorbent --- regeneration --- α-NiMoO4 --- methylene blue --- removal --- zirconium phosphate --- wastewater pollutants --- ion exchange --- heterogeneous photocatalysis --- nanomaterials --- rare earth metals --- wastewater treatment --- pollutants --- green-removal --- tangerine peels activated carbon --- agriculture waste --- acetamiprid pesticide --- enzymatic hydrolysis lignin --- sequential dissolution fractionation --- methylene blue adsorption capacity --- CuFe2O4 nano-particles --- CuFe2O4/PANI composite --- mercury (II) removal --- adsorption --- biochar --- pyrolysis --- heavy metals --- soil remediation --- bioavailability --- biomass waste --- N doped carbon dots --- Cd (II) --- mechanism --- water remedy --- green adsorbents --- pineapple leaves --- rose bengal (RB) dye --- face-centered central composite design (FCCCD), percentage removal (%R) --- adsorption capacity (qe) --- phosphorus removal --- toxic metals --- alginate beads --- sewage sludge --- BC --- sequential extraction --- copper --- carbon-silicon interaction --- bioremediation --- toxic pollutants --- extreme conditions --- extremophilic microorganism --- non-thermal plasma (NTP) --- exhaust emission --- internal combustion engine --- ion chemical reaction --- insensitive munitions --- 3-nitro-1,2,4-triazol-5-one (NTO) --- industrial wastewater --- vetiver grass --- phytoremediation --- phytoextraction --- ammonia --- ammonium recovery --- Freundlich --- intraparticle diffusion --- isoelectric state --- Langmuir --- pseudo-second-order --- Temkin --- zeolite --- high-strength wastewater --- sludge liquor --- chitosan --- adsorbent --- carbon --- graphene oxide --- silica --- magnetic separation --- dyes --- Langmuir isotherm --- breakthrough curve --- defluoridation --- up-flow mode --- volcanic rocks --- toluene --- rhodamine B --- water stability of monolith --- nanosorbent --- regeneration --- α-NiMoO4 --- methylene blue --- removal --- zirconium phosphate --- wastewater pollutants --- ion exchange --- heterogeneous photocatalysis --- nanomaterials --- rare earth metals --- wastewater treatment --- pollutants

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Catalysts are widely used in a great variety of technologies, providing remarkable efficiency in order to address sustainable energy production, climate change challenges, and to reduce industrial emissions. In the framework of the Environmental Catalysis section promoted by the Catalysts Editorial Office, this Special Issue, entitled “Environmental Friendly Catalysts for Energy and Pollution Control Applications”, comprises novel studies representing the state-of-the-art research for efficient energy generation and industrial emission control based on new environmentally friendly catalyst materials (EFCs). In particular, in this Special Issue (SI), different kinds of catalysts are presented for catalytic solutions, including the reduction of NOx emissions (new zeolite catalyst modified with Pt), the elimination of volatile organic compounds (Co3O4@SiO2 and acidic surface transformed natural zeolite) and the removal of SO2 emissions (through adsorption processes with sodium citrate). Moreover, novel biocatalysts for bioanodes and new functional nanostructured catalysts based on metal–organic framework (MOFs) for different applications are also included. Additionally, articles compiled in this SI are also focused on the improvement of catalytic processes. Thus, selected processes based on activated carbons (modified with titanium dioxide) and optimized Fenton processes for the removal of aqueous organic pollutants or for the inactivation of bacteria are also presented.

Technology: general issues --- Environmental science, engineering & technology --- photocatalysis --- organic wastewater --- preparation method --- degradation --- characterizations --- hybridization --- exoelectrogen --- biocatalyst --- microenvironment --- porous electrode --- anaerobic --- recalcitrant compounds --- E. coli K12 --- methylene blue --- optimization --- Pareto chart --- perturbation graph --- Pt-based promoter --- CO oxidation --- environmental catalysis --- refinery compliance --- fluid catalytic cracking --- FCC --- sodium citrate --- sodium humate --- SO2 --- absorption --- BaQD --- carbamazepine --- ferric coordination complex --- photo-Fenton --- turbidity --- cyanide --- activated carbon --- titanium dioxide --- composites --- continuous flow --- adsorption --- catalytic ozonation --- Lewis and Brønsted acid sites --- natural zeolite --- reaction mechanism --- toluene --- three-phase modelling --- fixed-bed reactor --- wastewater treatment --- phenol --- granular activated carbon --- Ad/Ox --- volatile organic compounds --- core–shell structures --- spherical polymer templates --- Co3O4 --- Pd-based promoter --- NOx emission --- metal–organic frameworks --- heterogeneous catalysis --- carbon dioxide --- biomass --- hydrogenation --- oxidation --- Fisher-Tropsch --- photocatalysis --- organic wastewater --- preparation method --- degradation --- characterizations --- hybridization --- exoelectrogen --- biocatalyst --- microenvironment --- porous electrode --- anaerobic --- recalcitrant compounds --- E. coli K12 --- methylene blue --- optimization --- Pareto chart --- perturbation graph --- Pt-based promoter --- CO oxidation --- environmental catalysis --- refinery compliance --- fluid catalytic cracking --- FCC --- sodium citrate --- sodium humate --- SO2 --- absorption --- BaQD --- carbamazepine --- ferric coordination complex --- photo-Fenton --- turbidity --- cyanide --- activated carbon --- titanium dioxide --- composites --- continuous flow --- adsorption --- catalytic ozonation --- Lewis and Brønsted acid sites --- natural zeolite --- reaction mechanism --- toluene --- three-phase modelling --- fixed-bed reactor --- wastewater treatment --- phenol --- granular activated carbon --- Ad/Ox --- volatile organic compounds --- core–shell structures --- spherical polymer templates --- Co3O4 --- Pd-based promoter --- NOx emission --- metal–organic frameworks --- heterogeneous catalysis --- carbon dioxide --- biomass --- hydrogenation --- oxidation --- Fisher-Tropsch