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Mixed matrix membranes (MMMs) have attracted a large amount of interest in research laboratories worldwide in recent decades, motivated by the gap between a growing interest in developing novel mixed matrix membranes by various research groups and the lack of large-scale implementation. This Special Issue contains six publications dealing with the current opportunities and challenges of mixed matrix membranes development and applications to solve environmental and health challenges of the society of 21st century.

modeling --- neural tissue regeneration --- membrane fabrication --- nanoporous polybenzimidazole membranes --- photo-assisted polymerization --- poly (?-caprolactone) --- supported ionic liquid membranes --- CH4 selective membranes --- flat-sheet membrane --- hollow fiber membrane --- ion exchange capacity --- reduced graphene oxide --- polymer of intrinsic microporosity --- CH4 solubility --- RHO --- temperature --- porous nanoparticles --- protic imidazolium ionic liquids --- POSS® --- mixed matrix membranes --- characterization techniques --- membrane modification --- in vitro human neural models --- small-pore zeolites (CHA --- Poly(trimethylsilyl-1-propyne) (PTMSP) --- LTA) --- filler dispersion --- gas separation --- water vapor --- gas separation membrane --- CO2 separation --- nanocomposite membranes --- hydrolytic bulk degradation mechanism --- PVA --- compatibility --- borane

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The increasingly stricter standards for effluent discharge and the decreasing availability of freshwater resources worldwide have made the development of advanced wastewater treatment technologies necessary. Advanced oxidation processes (AOPs) are becoming an attractive alternative and a complementary treatment option to conventional methods. AOPs are used to improve the biodegradability of wastewaters containing non-biodegradable organics. Besides, AOPs may inactivate pathogenic microorganisms without adding additional chemicals to the water during disinfection, avoiding the formation of hazardous by-products. This Special Issue of Processes aims to cover recent progress and novel trends in the field of AOPs, including UV/H2O2, O3, sulphate-radical oxidation, nanotechnology in AOPs, heterogeneous photocatalysis, sonolysis, Fenton, photo-Fenton, electrochemical oxidation, and related oxidation processes. The topics to be addressed in this Special Issue of Processes may also include the application of AOPs at various scales (laboratory, pilot, or industrial scale), the degradation of emerging contaminants in water and wastewater and pollutants in the gas phase, the quantification of toxicicy in residuals, the development of novel catalytic materials and of hybrid processes, including the combination of AOPs with other technologies, process intensification, and the use of photo-electrochemical processes for energy production.

polycyclic musks --- degradation mechanism --- UV/chlorine advanced oxidation process --- water treatment --- UV-LED --- photoreactors --- mining wastewater --- cyanide --- metal removal --- photocatalysis --- TiO2 nanotubes --- emerging contaminants --- paracetamol --- pH --- heating oxidation --- surface/interface properties --- floatability --- induction time --- bubble-particle wrap angle --- cow manure --- chemical activation process --- activated carbon --- pore property --- cationic pollutant --- adsorption performance --- nano zero-valent iron --- borohydride reduction method --- wastewater treatment --- iron nanopowders --- lead ions --- biological processes --- electrochemical processes --- oxidation processes --- petroleum --- phenols --- sulfides --- ethyl violet --- Mn-doped Fe/rGO nanocomposites --- mesoporous materials --- artificial intelligence --- gradient boosted regression trees --- total dissolved nitrogen --- digestion method --- digestion efficiency --- intensification --- ozone --- electrolyzed water --- foodborne pathogens --- sanitization --- advace oxitadion processes (AOP) --- electro-oxidation --- ferrate ion --- BBR dye --- n/a

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Clean water is one of the most important natural resources on earth. Wastewater, which is spent water, is also a valuable natural resource. However, wastewater may contain many contaminants and cannot be released back into the environment until the contaminants are removed. Untreated wastewater and inadequately treated wastewater may have a detrimental effect on the environment and has a harmful effect on human health. Water quality engineering addresses the sources, transport and treatment of chemical and microbiological contaminants that affect water. Objectives for the treatment of wastewater are that the treated wastewater can meet national effluent standards for the protection of the environment and the protection of public health. This book, which is based on the Special Issue, includes contributions on advanced technologies applied to the treatment of municipal and industrial wastewater and sludge. The book deals with recent advances in municipal wastewater, industrial wastewater, and sludge treatment technologies, health effects of municipal wastewater, risk management, energy efficient wastewater treatment, water sustainability, water reuse and resource recovery.

Technology: general issues --- Dimocarpus longan seeds --- leachate treatment --- coagulant–flocculation --- polyaluminium chloride --- enteric virus --- remediation technology --- water quality --- chitosan --- diclofenac --- ibuprofen --- magnetic biochar --- naproxen --- aerobic–MOB–anoxic process --- biogas --- denitrification --- mixed methanotroph culture --- WWTP --- ionizing radiation --- agricultural effluents --- dye treatment --- pharmaceutical effluents --- disinfection --- ammonia --- zeolite --- electrocoagulation --- response surface methodology --- stabilized --- leachate --- adsorption capacity --- decentralized water supply --- electrochemical reaction --- inconsistent view --- sand filtration --- wastewater treatment --- zero-valent iron --- submergence --- eutrophication --- invasive-native competition --- growth rate --- morphological traits --- polluted urban river --- sequential constructed wetlands --- purification effect --- water restoration --- Yitong River --- air gap membrane distillation --- heavy metal removal --- industrial wastewater --- greywater treatment --- house onsite --- reuse --- irrigation --- acceptance --- barriers --- heavy metals determination --- groundwater --- greywater --- adsorption --- separation --- inductively coupled plasma mass spectroscopy --- natural and modified polymer --- biodegradability --- toxicant dyes --- industrial wastewater treatment --- kinetic studies --- Moringa oleifera --- plant seed biomass --- prediction modeling --- diclofenac (DIC) --- pH-dependent degradation mechanism --- reactive site --- tunnel-structured manganese oxide --- γ-MnO2 --- Lemna minor bioassay --- visual system --- computer vision --- water pollution assessment --- bioindicators --- synthetic nanoparticles --- nTiO2 and nCeO2 --- waste water treatment --- sp-ICP-MS nanoparticle tracking --- acid mine drainage --- sulphate reduction --- sulphate reducing bacteria --- n/a --- coagulant-flocculation --- aerobic-MOB-anoxic process

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Clean water is one of the most important natural resources on earth. Wastewater, which is spent water, is also a valuable natural resource. However, wastewater may contain many contaminants and cannot be released back into the environment until the contaminants are removed. Untreated wastewater and inadequately treated wastewater may have a detrimental effect on the environment and has a harmful effect on human health. Water quality engineering addresses the sources, transport and treatment of chemical and microbiological contaminants that affect water. Objectives for the treatment of wastewater are that the treated wastewater can meet national effluent standards for the protection of the environment and the protection of public health. This book, which is based on the Special Issue, includes contributions on advanced technologies applied to the treatment of municipal and industrial wastewater and sludge. The book deals with recent advances in municipal wastewater, industrial wastewater, and sludge treatment technologies, health effects of municipal wastewater, risk management, energy efficient wastewater treatment, water sustainability, water reuse and resource recovery.

Technology: general issues --- Dimocarpus longan seeds --- leachate treatment --- coagulant-flocculation --- polyaluminium chloride --- enteric virus --- remediation technology --- water quality --- chitosan --- diclofenac --- ibuprofen --- magnetic biochar --- naproxen --- aerobic-MOB-anoxic process --- biogas --- denitrification --- mixed methanotroph culture --- WWTP --- ionizing radiation --- agricultural effluents --- dye treatment --- pharmaceutical effluents --- disinfection --- ammonia --- zeolite --- electrocoagulation --- response surface methodology --- stabilized --- leachate --- adsorption capacity --- decentralized water supply --- electrochemical reaction --- inconsistent view --- sand filtration --- wastewater treatment --- zero-valent iron --- submergence --- eutrophication --- invasive-native competition --- growth rate --- morphological traits --- polluted urban river --- sequential constructed wetlands --- purification effect --- water restoration --- Yitong River --- air gap membrane distillation --- heavy metal removal --- industrial wastewater --- greywater treatment --- house onsite --- reuse --- irrigation --- acceptance --- barriers --- heavy metals determination --- groundwater --- greywater --- adsorption --- separation --- inductively coupled plasma mass spectroscopy --- natural and modified polymer --- biodegradability --- toxicant dyes --- industrial wastewater treatment --- kinetic studies --- Moringa oleifera --- plant seed biomass --- prediction modeling --- diclofenac (DIC) --- pH-dependent degradation mechanism --- reactive site --- tunnel-structured manganese oxide --- γ-MnO2 --- Lemna minor bioassay --- visual system --- computer vision --- water pollution assessment --- bioindicators --- synthetic nanoparticles --- nTiO2 and nCeO2 --- waste water treatment --- sp-ICP-MS nanoparticle tracking --- acid mine drainage --- sulphate reduction --- sulphate reducing bacteria

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The fluid flow in fracture porous media plays a significant role in the assessment of deep underground reservoirs, such as through CO2 sequestration, enhanced oil recovery, and geothermal energy development. Many methods have been employed-from laboratory experimentation to theoretical analysis and numerical simulations-and allowed for many useful conclusions. This Special Issue aims to report on the current advances related to this topic. This collection of 58 papers represents a wide variety of topics, including on granite permeability investigation, grouting, coal mining, roadway, and concrete, to name but a few. We sincerely hope that the papers published in this Special Issue will be an invaluable resource for our readers.

deformation feature --- minerals --- microstructure --- mixing --- permeability --- gas concentration --- water–rock interaction --- loose gangue backfill material --- unified pipe-network method --- fracture --- roof-cutting resistance --- crack --- similar-material --- movable fluid --- gob-side entry retaining (GER) --- rock-soil mechanics --- bed separation --- orthogonal tests --- charge separation --- water soaked height --- fluid flow in reclaimed soil --- laboratory experiment --- longwall mining --- grading broken gangue --- MIP --- elastic modulus --- effective stress --- permeability coefficient --- mixer --- naturally fracture --- SEM --- microstructure characteristics --- artificial joint rock --- fractured rock --- strata movement --- conservative solute --- particle velocity --- dry-wet cycles --- hydraulic fractures --- numerical calculation --- mechanical behaviors --- normalized conductivity-influence function --- fractured porous rock mass --- PPCZ --- segmented grouting --- non-aqueous phase liquid --- intelligent torque rheometer --- numerical analysis --- temperature --- unsaturated soil --- uniaxial compressive strength --- mine shaft --- coalbed methane (CBM) --- nonlinear flow in fractured porous media --- similar simulation --- forecasting --- tight sandstones --- oriented perforation --- hydro-mechanical coupling --- constant normal stiffness conditions --- cohesive soils --- layered progressive grouting --- chemical grouts --- grain size of sand --- Darcy’s law --- soft coal masses --- hydro-power --- cyclic heating and cooling --- cohesive element method --- cement-based paste discharge --- tectonically deformed coal --- split grouting --- fault water inrush --- filtration effects --- T-stress --- particle flow modeling --- new cementitious material --- strength --- stabilization --- fractured porous medium --- brine concentration --- initial water contained in sand --- XRD --- fracture criteria --- hydraulic conductivity --- roadway deformation --- backfill mining --- adsorption/desorption properties --- pore pressure --- roughness --- cement–silicate grout --- compressive stress --- discrete element method --- dynamic characteristics --- strain-based percolation model --- thermal-hydrological-chemical interactions --- pore distribution characteristics --- transversely isotropic rocks --- nitric acid modification --- disaster-causing mechanism --- CH4 seepage --- crack distribution characteristics --- micro-CT --- relief excavation --- Darcy flow --- hydraulic fracturing --- mixed-form formulation --- propagation --- scanning electron microscope (SEM) images --- propagation pattern --- consolidation process --- rheological deformation --- gas adsorption --- soft filling medium --- ground pressure --- orthogonal ratio test --- rock fracture --- coal seams --- high-steep slope --- interface --- orthogonal test --- stress interference --- physical and mechanical parameters --- fracture propagation --- fluid–solid coupling theory --- coupling model --- surface characteristics --- numerical manifold method --- gas --- lignite --- water inrush prevention --- coupled THM model --- hard and thick magmatic rocks --- Ordos Basin --- porosity --- damage mechanics --- seepage --- degradation mechanism --- high temperature --- visualization system --- bentonite-sand mixtures --- contamination --- conductivity-influence function --- water-rock interaction --- deterioration --- seepage pressure --- glutenite --- adhesion efficiency --- mechanical behavior transition --- bedding plane orientation --- n/a --- enhanced gas recovery --- debris-resisting barriers --- reinforcement mechanism --- on-site monitoring --- geophysical prospecting --- cyclic wetting-drying --- scoops3D --- semi-analytical solution --- enhanced permeability --- management period --- seepage control --- deformation --- Yellow River Embankment --- impeded drainage boundary --- rheological test --- circular closed reservoir --- grout penetration --- viscoelastic fluid --- coal-like material --- paste-like slurry --- floor failure depth --- supercritical CO2 --- gravel --- numerical model --- fractal --- gas-bearing coal --- shear-flow coupled test --- rheological limit strain --- CO2 flooding --- flotation --- goaf --- slope stability --- damage --- coal and gas outburst --- hydraulic fracture --- anisotropy --- high-order --- effluents --- FLAC --- limestone roof --- sandstone --- TG/DTG --- Xinjiang --- two-phase flow --- model experiment --- coal particle --- volumetric strain --- failure mode --- land reclamation --- sandstone and mudstone particles --- contiguous seams --- CO2 geological storage --- numerical simulation --- geogrid --- stress relief --- optimum proportioning --- roadside backfill body (RBB) --- pervious concrete --- mudstone --- hydraulic fracture network --- grouted sand --- fractal pore characteristics --- refraction law --- segmented rheological model --- ductile failure --- heterogeneity --- flow law --- fracture closure --- coal measures sandstone --- tight sandstone gas reservoirs --- gob behaviors --- water-dripping roadway --- creep characteristics --- internal erosion --- warning levels of fault water inrush --- hydraulic aperture --- bolt support --- discontinuous natural fracture --- microscopic morphology --- critical hydraulic gradient --- mixed mode fracture resistance --- differential settlement --- alternate strata --- finite element method --- crushing ratio --- chloride --- glauberite cavern for storing oil &amp --- macroscopic mechanical behaviors --- collision angle --- adsorption performance --- failure mechanism --- mechanical properties --- transmissivity --- damage evolution --- gas fracturing --- multitude parameters --- deviatoric stress --- Jiaohe --- coal --- soil properties --- acoustic emission --- pore structure --- grouting experiment --- concrete --- confining pressures --- green mining --- gas drainage --- fluid viscosity --- compression deformation --- Unsaturation --- adsorption–desorption --- seepage-creep --- constitutive model --- soil particle size --- Pseudo Steady-State (PPS) constant --- soil–structure interface --- debris flow --- fracture grouting --- initial settlement position --- regression equation --- electrical potential --- secondary fracture --- surrounding rock --- solid backfill coal mining --- time variation --- excess pore-pressures --- finite-conductivity fracture --- permeability characteristics --- rainfall-unstable soil coupling mechanism(R-USCM) --- shaft lining --- Darcy's law --- cement-silicate grout --- fluid-solid coupling theory --- adsorption-desorption --- soil-structure interface