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Journal of Rare Earths 2024年第4期42卷 775-782页

作者： Glaydson S.dos Reis Diana Pinto Sabrina F.lütke Eder C.lima luis F.O.Silva Irineu A.S.De Brum guilherme l.dotto Department of Forest Biomaterials and Technology Biomass Technology Centre Swedish University of Agricultural SciencesUmeaE13Swedn Universidad De la Costa Calle 58#55-66080002BarranquillaAtlanticoColombia Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC) Federal University of Santa MariaAv.Roraima100079705900Santa MariaRSBrazil Institute of Chemistry Federal University of Rio Grande do Sul90040060Porto AlegreBrazil

Chitin powder and chitin-aerogel were prepared from shrimp wastes and used to uptake Y^(3+)from aqueous solutions and concentrate this rare earth element from phosphogypsum(PG).Chitin aerogel displays a specific surface area of 945 m^(2)/g,while chitin powder is 3.6 m^(2)/g,which largely influences its adsorption *** the adsorption in synthetic solutions,the effect of pH on Y^(3+)removal is strong for chitin powder *** contrast,no big pH influence was detected for chitin *** interactions and chelation can highlight the proposed mechanism of Y^(3+)on chitin adsorbents for the powder and ***,in addition to these interactions,pore filling/pore diffusion is the main mechanism of Y^(3+)removal in the chitin *** aerogel is efficient in concentrating 8 times the Y^(3+)from PG,a very complex *** complex chitin aerogel-Y^(3+)can be a secondary source of rare earth elements for other applications.

关键词： Rare earths Sustainable material Chitin powder Chitin porous aerogel Yttrium adsorption and recovery

Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage

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Geoscience Frontiers 2021年第6期12卷 404-410页

作者： luis F.O.Silva Diana Pinto guilherme l.dotto James C.Hower Department of Civil and Environmental.Universidad de la Costa CUCCalle 58#55–66BarranquillaAtlanticoColombia Universidade Federal de Santa Maria–UFSM 1000Roraima Avenue97105–900Santa MariaRSBrazil University of Kentucky Department of Earth&Environmental SciencesLexingtonKY40506USA University of Kentucky Center for Applied Energy Research2540 Research Park DriveLexingtonKY40511USA

Efflorescent nanophases(NPs) are found as a transitory accumulation of potentially hazardous elements(PHEs),particularly in tropical climates. The central objective of this study was to investigate the distribution of PHEs with NPs through the evaporative formation structures(EFS) of enormously PHEs-rich coal-mine drainages(CMD). The EFS were studied in natural coal mine drainage for five months in order to determine their geochemical and ecological structures and to assess their position in the reduction of PHEs in nature. The largest coal-fired power plant in South America, located in south Brazil, is used as an example of such a problem. In this work, a novel methodology for the analysis of PHEs in CMD precipitates is proposed for this affected coal *** analytical method, combining X-Ray Diffraction(XRD) and advanced electron microscopies, shows the importance of nanomineralogy in understanding different circumstances of coal contamination. Several ultrafinenanoparticles(UNPs) were identified in the sampled soils and river sediments together with the PHEs. A decrease in PHEs was identified in association with UNPs. However, further investigations are required with regard to the mobility of PHEs in water, atmosphere, soils, and sediments. The EPS was thoroughly studied, acquiring suitable understanding with investigational facts for Ca and Fe-sulphates, pickeringite, and several amorphous phases.

关键词： Coal mine drainage Evaporative precipitation Sediments Water and soil pollution

An overview of geological originated materials as a trend for adsorption in wastewater treatment

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Geoscience Frontiers 2022年第1期13卷 457-477页

作者： Yasmin Vieira Matias Schadeck Netto Éder C.lima Ioannis Anastopoulos Marcos l.S.Oliveira guilherme l.dotto Chemistry Department Federal University of Santa Maria-UFSM1000Roraima Avenue97105-900 Santa MariaRSBrazil Chemical Engineering Department Federal University of Santa Maria-UFSM1000Roraima Avenue97105-900 Santa MariaRSBrazil Institute of Chemistry Federal University of Rio Grande do Sul(UFRGS)P.O.Box 1500391501-970 Porto AlegreRSBrazil Department of Chemistry University of CyprusP.O.Box 20537CY-1678 NicosiaCyprus Universidad de lima Avenida Javier Prado Este 4600-Santiago de Surco 1503Peru Department of Civil and Environmental Universidad de la CostaCalle 58#55-66080002 BarranquillaAtlánticoColombia

Adsorption is a unit operation widely used for the tertiary treatment of the most diverse effluents,whose mechanism is based on removing recalcitrant compounds from the organic and inorganic *** this process,choosing a suitable adsorbent is a fundamental *** review article focuses on the adsorbents with natural geological origin:minerals,clays,geopolymers,and even wastes resulted from mining ***,over 450 articles and research papers were *** materials’main sources are described,and their characteristics,composition,and intrinsic properties are related to ***,we discuss the effects of several process parameters,such as p H,temperature,pollutant,and adsorbent ***,equilibrium,kinetics,and thermodynamic aspects are also addressed,and relevant regeneration prospects and final ***,some suggestions and perspectives on applying these adsorbents in wastewater treatment are presented as future trends.

关键词： Adsorption Equilibrium Geological-based adsorbents Process parameters Wastewater treatment

Deposition of nanoparticles on school eyeglasses in urban and rural areas:A methodology for a more real assessment of the possible impacts

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Geoscience Frontiers 2022年第1期13卷 498-505页

作者： Kátia Martinello James C.Hower guilherme l.dotto Claudete G.Ramos Carlos E.Schnorr Diana Pinto Instituto Inanís Rua Felizardo FurtadoPorto AlegreBrazil University of Kentucky Department of Earth&Environmental SciencesLexingtonKY 40506USA University of Kentucky Center for Applied Energy Research2540 Research Park DriveLexingtonKY 40511USA Chemical Engineering Department Federal University of Santa Maria97105-900 Santa MariaBrazil Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55–66BarranquillaAtlánticoColombia

Because incomplete confirmation is available concerning the influential role of atmosphere contamination on conjunctivitis,myopia,asthma,and allergic rhinitis in Brazil,the focus of the present work is to explore the possible relations among atmosphere contamination and eye *** that a case study on eye diseases,by way of questionnaires supplemented by the investigation of nanoparticles(NPs)on eyeglasses,the study examines the mechanisms in which NPs and ultra-fine particles are deposited on the glasses of children up to 10 years of age in urban and rural *** important connection between atmosphere contaminants and individual protection equipment justifies improving indoor school properties in order could protect children’s eyes,particularly in high-pollution/high-particulate areas.

关键词： Indoor air pollution Nanoparticles Eyes health Allergic reaction Schools

Geochemical study of submicron particulate matter(PM1)in a metropolitan area

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Geoscience Frontiers 2022年第1期13卷 417-429页

作者： Ismael l.Schneider Elba C.Teixeira guilherme l.dotto Diana Pinto Cheng-Xue Yang luis F.O.Silva Postgraduate Program in Remote Sensing and Meteorology Universidade Federal do Rio Grande do SulAv.Bento Gonçalves9500 Porto AlegreRSBrazil Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55-66BarranquillaAtlanticoColombia Research Department Fundação Estadual de Proteção Ambiental Henrique Luís RoesslerAv.Borges de Medeiros261Porto AlegreRSBrazil Chemical Engineering Department Federal University of Santa Maria97105-900 Santa MariaBrazil School of Earth Sciences and Resources China University of Geosciences BeijingBeijing 100083PR China Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600–Santiago de Surco 1503Perú

Air pollution has become a major problem in urban areas due to increasing industrialization and *** this study ambient concentrations of PM1 and metal concentrations as well as source contributions were identified and quantified by using Positive Matrix Factorization(PMF)in receptor modeling in the Metropolitan Area of Porto Alegre,*** PM1 samples were collected on PTFE filters from December 2012 to December 2014 in two sampling *** ion and trace element concentrations were *** average concentrations were 12.8 and 15.2μg/m^(3) for Canoas and Sapucaia do Sul sites,*** ion contributions of PM1 were secondary pollutants such as sulfate and *** elements,especially Cu,Pb,Zn,Cd,and Ni also made important contributions which are directly associated with anthropogenic *** results show significantly higher levels in winter than in *** of the PM1 and the analyzed PM species and elements originated from anthropogenic sources,especially road traffic,combustion processes and industrial activities,which are grouped in 7 major contributing sources.A back-trajectory analysis showed that the long-range transport of pollutants was not relevant in relation to the contribution to PM1 and metal *** work highlights the importance of urban planning to reduce human health exposure to traffic and industrial emissions,combined with awareness-raising actions for citizens concerning the impact of indoor sources.

关键词： PM1 Trace elements Source apportionment PMF Back trajectory

Artisanal ceramic factories using wood combustion:A nanoparticles and human health study

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Geoscience Frontiers 2022年第1期13卷 488-497页

作者： Kátia Martinello James C.Hower Diana Pinto Carlos E.Schnorr guilherme l.dotto Marcos leandro Silva Oliveira Claudete G.Ramos Instituto Inanís Rua Felizardo FurtadoPorto AlegreBrazil Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55–66BarranquillaAtlánticoColombia University of Kentucky Department of Earth&Environmental SciencesLexingtonKY 40506USA University of Kentucky Center for Applied Energy Research2540 Research Park DriveLexingtonKY 40511USA Centro de Estudos em Estresse Oxidativo-Departamento de Bioquímica-Instituto de Ciências Básicas da Saúde-Universidade Federal do Rio Grande do Sul(UFRGS) Porto AlegreRSBrazil Chemical Engineering Department Federal University of Santa MariaUFSMRoraima Avenue1000Santa MariaRS97105-900Brazil Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600–Santiago de Surco 1503Peru

The ceramics industry,resulting from developments of modern compounds,is a segment of great influence in worldwide *** ceramic factories based on wood combustion have significant risks for the creation and discharge of atmosphere nanoparticles(NPs)and ultra-fine particles(UFPs).At present,there is insufficient recognition on the influence of engineered-NPs on the atmosphere and *** improvements are indispensable to diminish contact with *** present study demonstrates the main NPs and UFPS present in an area of intense artisanal wood-combustion ceramic *** matter was sampled for morphological,chemical,and geochemical studies by sophisticated electron microbeam microscopy,X-Ray Diffraction,and Raman *** NPs configuration(10 nm)were produced around the studied artisanal ceramic *** study presents an indication of the recent information on population and work-related contact to NPs in the artisanal ceramic factories and their influence on health.

关键词： Ceramic manufacturing Nanoparticles Advanced characterization Multiple impacts

Adsorption of rare earth elements onto diatomite M45:Experimental investigations and modeling with statistical physics theory

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Journal of Rare Earths 2023年第11期41卷 1805-1811,I0006页

作者： Fatma Dhaouadi guilherme l.dotto Julien Vieillard Diana Pinto luis F.O.Silva Éder C.lima Mu Naushad Fatma Aouaini Samia Nasr Adrián Bonilla-Petriciolet Abdelmottaleb Ben lamine laboratory of Quantum and Statistical Physics LR18ES18Faculty of Sciences of MonastirMonastir UniversityMonastirTunisia Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC) Federal University of Santa MariaAv.Roraima1000-797105–900Santa MariaRSBrazil NormandieUniversité UNIROUENINSA RouenCNRSCOBRA(UMR 6014)27000EvreuxFrance Universidad De la Costa Calle 58#55-66080002BarranquillaAtlánticoColombia Advanced Materials Research Chair Department of ChemistryCollege of ScienceKing Saud UniversityRiyadh11451Saudi Arabia Department of Chemistry College of ScienceBuilding#5King Saud UniversityRiyadhSaudi Arabia Department of Physics College of SciencePrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityAbha61413P.O.Box 9004Saudi Arabia Chemistry Department Faculty of ScienceKing Khalid UniversityP.O.Box 9004Abha61413Saudi Arabia Instituto Tecnológico de Aguascalientes 20256AguascalientesMexico

The separation of rare earth elements using diatomite M45 from aqueous solutions was *** experimental isotherms for the adsorption of trivalent lanthanum,cerium,and neodymium cations on this adsorbent were quantified under strongly acidic conditions(pH 2)at 298-328 *** adsorption equilibria of these earth elements were analyzed using two statistical physics models(homogeneous and heterogeneous monolayer models).The results show that the adsorption of these ions implies a multiionic mechanism,which is ***-containing functional groups are responsible for the adsorption of these rare-earth elements on the diatomite surface.A heterogeneous statistical physics model confirms that two Si-based functional groups participate in the separation of these *** calculated adsorption capacities at saturation follow the order:neodymium>cerium>*** interaction energies range from 28600 to 40100 J/mol,indicating physical adsorption on diatomite *** study demonstrates that diatomite M45 is a promising separation medium that can be used for the recovery of REEs dissolved in aqueous solutions via adsorption.

关键词： lanthanum Cerium Neodymium Adsorption Diatomite M45 Statistical physics model

Particulate matter geochemistry of a highly industrialized region in the Caribbean:Basis for future toxicological studies

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Geoscience Frontiers 2022年第1期13卷 376-387页

作者： luis F.O.Silva Ismael l.Schneider Paulo Artaxo Yuleisy Núñez-Blanco Diana Pinto Érico M.M.Flores leandro Gómez-Plata Omar Ramírez guilherme l.dotto Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55–66BarranquillaAtlánticoColombia Department of Applied Physics Institute of PhysicsUniversity of São PauloBrazil Department of Chemistry Universidade Federal de Santa MariaRSBrazil Universidad Militar Nueva Granada(UMNG) Faculty of EngineeringEnvironmental EngineeringKm 2 Cajicá-ZipaquiráColombia Chemical Engineering Department Federal University of Santa Maria-UFSM1000Roraima Avenue97105-900 Santa MariaRSBrazil

Air pollution has become an important issue,especially in Caribbean urban areas,and,particulate matter(PM)emitted by different natural and anthropogenic sources causes environmental and health *** this work,we studied the concentrations of PM_(10) and PM_(2.5) sources in an industrial and port urban area in the Caribbean region of *** samples were collected within 48-h periods between April and October 2018 by using a Partisol 2000 i-D *** geochemical characterization was performed by X-ray fluorescence(XRF)***,ionic species and black carbon(BC)were quantified by ion chromatography and reflectance spectroscopy,*** the Positive Matrix Factorization(PMF)receptor model,the contributions of PM sources were *** average concentration of PM_(10) was 46.6±16.2μg/m^(3),with high concentrations of Cl and *** PM_(2.5),the average concentration was 12.0±3.2μg/m^(3),and the most abundant components were BC,S,and *** receptor model identified five sources for PM_(10) and PM_(2.5).For both fractions,the contributions of marine sea spray,re-suspended soil,and vehicular traffic were *** addition,PM_(2.5) included two mixed sources were found to be fuel oil combustion with fertilizer industry emissions,and secondary aerosol sources with building construction ***,PM_(10) was found to also include building construction emissions with re-suspended soil,and metallurgical industry *** obtained geochemical atmospheric results are important for the implementation of strategies for the continuous improvement of the air quality of the Caribbean region.

关键词： Urban air pollution Particulate matter Geochemical composition Aerosol source apportionment Receptor models PMF

Investigation of the nutritional and functional roles of a combinational use of xylanase and β-glucanase on intestinal health and growth of nursery pigs

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1932-1950页

作者： Hyunjun Choi Yesid Garavito Duarte guilherme A.M.Pasquali Sung Woo Kim Department of Animal Science North Carolina State University116 Polk HallCampus Box 7621RaleighNC 27695USA BASF SE Ludwigshafen 67056Germany

Background Xylanase andβ-glucanase combination(XG)hydrolyzes soluble non-starch polysaccharides that are anti-nutritional *** study aimed to evaluate the effects of increasing levels of XG on intestinal health and growth performance of nursery *** Forty pigs(6.5±0.4 kg)were assigned to 5 dietary treatments and fed for 35 d in 3 phases(11,9,and 15 d,respectively).Basal diets mainly included corn,soybean meal,and corn distiller's dried grains with solubles,contained phytase(750 FTU/kg),and were supplemented with 5 levels of XG at(1)0,(2)280 TXU/kg xylanase and 125 TGU/kgβ-glucanase,(3)560 and 250,(4)840 and 375,or(5)1,120 and 500,*** performance was *** d 35,all pigs were euthanized and jejunal mucosa,jejunal digesta,jejunal tissues,and ileal digesta were collected to determine the effects of increasing XG levels and XG intake on intestinal *** Increasing XG intake tended to quadratically decrease(P=0.059)viscosity of jejunal digesta(min:1.74 m Pa·s at 751/335(TXU/TGU)/kg).Increasing levels of XG quadratically decreased(Pllaceae(min:0.6%at 630/281(TXU/TGU)/kg)in the jejunal *** XG intake quadratically increased(Plactobacillaceae(max:40.3%at 608/271(TXU/TGU)/kg)in the jejunal *** XG intake quadratically decreased(Plicobacteraceae(min:1.6%at 560/250(TXU/TGU)/kg)in the jejunal *** levels of XG tended to linearly decrease(P=0.073)jejunal Ig G and tended to quadratically increase(P=0.085)jejunal villus height to crypt depth ratio(max:2.62 at 560/250(TXU/TGU)/kg).Increasing XG intake tended to linearly increase the apparent ileal digestibility of dry matter(P=0.087)and ether extract(P=0.065).Increasing XG intake linearly increased(Ply *** A combinational use of xylanase andβ-glucanase would hydrolyze the non-starch polysaccharides fractions,positively modulating the jejunal mucosa-associated *** intake of

关键词： Glucanase Growth performance Intestinal health Nursery pigs Xylanase

Anomalies in the short-range local environment and atomic diffusion in single crystalline equiatomic CrMnFeCoNi highentropy alloy

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Nano Research 2024年第6期17卷 5336-5348页

作者： Alevtina Smekhova Daniel Gaertner Alexei Kuzmin Ana guilherme Buzanich Goetz Schuck Ivo Zizak Gerhard Wilde Kirill V.Yusenko Sergiy Divinski Helmholtz-Zentrum Berlin für Materialien und Energie(HZB) D-12489 BerlinGermany Institute of Materials Physics University of MünsterD-48149 MünsterGermany Institute of Solid State Physics University of LatviaLV-1063 RigaLatvia Bundesanstalt für Materialforschung und–prüfung(BAM) D-12489 BerlinGermany

Multi-edge extended X-ray absorption fine structure(EXAFS)spectroscopy combined with reverse Monte Carlo(RMC)simulations was used to probe the details of element-specific local coordinations and component-dependent structure relaxations in single crystalline equiatomic CrMnFeCoNi high-entropy alloy as a function of the annealing *** representative states,namely a high-temperature state,created by annealing at 1373 K,and a low-temperature state,produced by long-term annealing at 993 K,were compared in *** features identified in atomic configurations of particular principal components indicate variations in the local environment distortions connected to different degrees of compositional disorder at the chosen representative *** detected changes provide new atomistic insights and correlate with the existence of kinks previously observed in the Arrhenius dependencies of component diffusion rates in the CrMnFeCoNi high-entropy alloy.

关键词： high-entropy alloys diffusion short-range order extended X-ray absorption fine structure(EXAFS) reverse Monte Carlo