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Possibilities of using silicate rock powder:An overview

Geoscience Frontiers 2022年第1期13卷 446-456页

作者： claudete Gindri Ramos james c.hower Erika Blanco Marcos Leandro Silva Oliveira Suzi Huff Theodoro Department of civil and Environmental Engineering Universidad de la CostaCalle 58#55-66BarranquillaColombia Departamento de Ingeniería civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600Santiago de Surco 1503Peru center for Applied Energy Research University of Kentucky2540 Research Park DriveLexingtonKY 40511USA Department of Earth&Environmental Sciences University of KentuckyLexingtonKY 40511USA Postgraduate Program of Environment and Rural Development(PPG-MADER) Área Universitária01Vila Nossa Senhora de Fátima–Campus UnBPlanaltinaDFBrazil

This study evaluates the on use of crushed rocks(remineralizers)to increase soil fertility levels and which contributed to increase agricultural productivity,recovery of degraded areas,decontamination of water,and carbon *** use of these geological materials is part of the assumptions of rock technology and,indirectly,facilitates the achievement of sustainable development goals related to soil management,climate change,and the preservation of water *** over the past 50 years on silicate rocks focused on soil fertility management and agricultural *** recently,the combined use with microorganisms and organic correctives have shown positive results to mitigate soil degradation;to expand carbon sequestration and storage;and to contribute to the adsorption of contaminants from water and *** this article we show results obtained in several countries and we show that this technology can contribute to the sustainability of agriculture,as well as to reverse global *** mineral nutrients are released more slowly from these types of inputs,they remain in the soil for a longer time,stimulating the soil *** addition,they are a technology to soluble synthetic fertilizers replace,since the few nutrients derived from such inputs not consumed by plants are lost by leaching,contaminating groundwater and water *** addition,conventional methods rely heavily on chemical pesticides which cause damage to soil’s microfauna(responsible for the decomposition of organic matter and nutrient cycling)and the loss of organic carbon(in the form of dioxide),which is quickly dispersed in the *** rock powders are applied in natura,have long-lasting residual effects and reduce greenhouse gas emissions.

关键词： Rock powder Soil management carbon storage Water contaminant adsorption

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Geochronology,Mineralogy,and Geochemistry of the Tonsteins from the Permo–carboniferous Benxi Formation,Ordos Basin,North china craton

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Acta Geologica Sinica(English Edition) 2023年第5期97卷 1355-1371页

作者： WANG Luojing LÜDawei ZHANG Zhihui james c.hower Munira RAJI ZHANG Yushuai SHEN Yangyang GAO Jie Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals College of Earth Sciences and EngineeringShandong University of Science and TechnologyQingdaoShandong 266590China University of Kentucky Center for Applied Energy ResearchLexingtonKY 40511USA Sustainable Earth Institute University of PlymouthDevon PL48AAUK

Tonstein layers are found worldwide in the Permo-carboniferous coal-bearing *** study investigates the geochronology,mineralogy,and geochemistry of four tonstein samples from the Permo-carboniferous Benxi Formation,Ordos Basin,North china craton(Ncc).The typical features of the studied tonsteins include thin beds,lateral continuity,angular quartz grains,and euhedral zircons with similar U-Pb ages,indicating a significant pyroclastic *** addition,the tonstein samples have low TiO_(2)/Al_(2)O_(3)ratios(concentrations with obvious negative Eu anomalies,indicating that the tonsteins have a felsic magma ***,compared with the mean composition of clay shale,the studied tonsteins are characterized by high concentrations of the elements Nb and Ta,which may affect the concentration of the corresponding elements in surrounding coal *** zircon U-Pb ages of the tonsteins(293.9-298.8 Ma)provide a precise chronological framework on the Benxi Formation in the Ordos Basin,constraining the Gzhelian-Aselian *** tonsteins were probably sourced from arc volcanism along the western margin of the Ncc during the early Permian,implying that the Alxa Terrane had not amalgamated with the Ncc at that time.

关键词： tonsteins geochemistry Permo–carboniferous North china craton

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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

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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

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Estimating REY content of eastern Kentucky coal samples based on their associated ash elements

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Journal of Rare Earths 2018年第11期36卷 1234-1238页

作者： S.chehreh chelgani james c.hower Department of Electrical Engineering and computer Science University of Michigan center for Applied Energy Research University of Kentucky

coal and coal combustion byproducts can be considered as an alternative source of rare earth elements and yttrium （REY）. The study of relationships between REY and other main coal properties could have several advantages such as estimating REY content of coal particles and designing beneficial extraction method. In this investigation, inter-correlations between REY content with coal parameters （proximate and ash elements） for a wide range of eastern Kentucky coal samples （708 records） were explored. Results demonstrate that zircon and monazite are the main source of heavy and light rare earth elements （HREE and LREE）, respectively. Zr has the highest correlation with Y and Th has the strength relationship with ce and La. In general, LREE have higher interaction with coal ash content in comparison with HREE. Results indicated that REY can be estimated quite satisfactorily by using their associated elements in coal ash.

关键词： coal Heavy rare earth Light rare earth Proximate Ash elements

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Rare Earth-bearing particles in fly ash carbons:Examples from the combustion of eastern Kentucky coals

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Energy Geoscience 2021年第2期2卷 90-98页

作者： james c.hower John G.Groppo University of Kentucky center for Applied Energy Research 2540 Research Park DriveLexington40511KYUSA University of Kentucky Department of Earth&Environmental SciencesLexingtonKY40506USA University of Kentucky Department of Mining EngineeringLexington40506KYUSA

Graphitic carbons from the combustion of bituminous coals and,perhaps,other coal ranks,tend to capture iron and a number of hazardous elements,including As,Hg,and *** earth elements in fly ashes occur in minerals,such as monazite,xenotime,and *** also occur in sub-nm particles,probably in a mineral form,within the AleSi glass on the investigated fly *** as graphitic carbons can capture Fe and hazardous elements,the carbons surrounding the fly ash glass and magnetic particles captures or encapsulates a broad suite of rare earth elements.

关键词： Lanthanides Fullerene Graphitic carbon Kentucky coal

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Geochemical and mineralogical evaluations of coal,shale,and mine waste overburden from Makum coalfield of the Northeast India

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International Journal of coal Science & Technology 2023年第3期10卷 41-57页

作者： Nilotpol Bhuyan Nazrul Islam Monikankana Saikia james chower Binoy K.Saikia coal and Energy Division CSIR-North East Institute of Science and TechnologyJorhatAssam 785006India Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India center for Applied Energy Research University of Kentucky2540 Research Park DriveLexingtonKY 40511USA

The cenozoic-age Makum coal from northeastern India offers numerous research opportunities because of its diverse geochemical and geological *** to its high sulfur content,the coal has been found to be less useful for industrial *** can,however,serve as a hub for ongoing research on coal-based derivative *** aim of this research work is to investigate the mineralogical and geochemical compositions of the coal,mine overburden(MOB)and shale samples taken from the Makum coal field and also on establishing a mutual relationship between *** characterize the geochemical controlling factors of the Makum coal field,the study employs coal petrography,FTIR,mineralogical,and geochemical *** to X-ray diffraction analysis,the major minerals like quartz,kaolinite,haematite,illite,pyrite,and calcite are present in coal and *** is observed by SEM-EDS analysis as cubic-shaped particles that are smaller than a fewμm in *** presence of sulfide minerals represents a phase of pyrite *** petrography study was used to better understand the environment that existed during the formation of the plant material,which aids us in determining the quantity of detrital mineral sediment contained in the *** to the IcP-MS analysis,the samples indicate significant levels of rare earth elements including *** present study reveals higher concentrations of poten-tial hazardous elements in the coal samples,with V,cr,Ni,cu,and Zn content in coal being considerably enriched compared to world-average *** correlation analysis reveals that the potential hazardous elements like co,Ni,As,and cu are associated with pyrite as they have strong affinity towards ***,numerous minerals and rare earth elements(REEs)exist,opening up a fresh avenue for more research in the *** study also assists researchers in understanding the significance of Makum coal and provides numerous ideas for coal charac

关键词： coal geology Mine waste overburden(MOB) Petrology Rare earth elements(REEs) Potentially hazardous elements(PHEs)

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Geochemical,mineralogical,and petrological characteristics of the cretaceous coal from the middle Benue Trough Basin,Nigeria:Implication for coal depositional environments

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Energy Geoscience 2022年第3期3卷 300-313页

作者： Segun A.Akinyemi james c.hower Henry Y.Madukwe Bemgba B.Nyakuma Mohammed B.Nasirudeen Timileyin A.Olanipekun Rabelani Mudzielwana Mugera W.Gitari Luis F.O.Silva Department of Geology Faculty of ScienceEkiti State UniversityP.M.B 5363Ado EkitiEkiti StateNigeria Energy Environmental and Nanosciences GroupDepartment of GeologyEkiti State UniversityP.M.B 5363Ado-EkitiEkiti StateNigeria University of Kentucky Centre for Applied Energy Research2540 ResearchPark DriveLexingtonKY40511USA Department of Earth&Environmental Sciences University of KentuckyLexingtonKY40506USA Department of chemistry Faculty of SciencesBenue State UniversityP.M.B.102119MakurdiBenue StateNigeria Department of chemistry Faculty of ScienceFederal University of LafiaP.M.B.146LafiaNasarawa StateNigeria Institute of Earth and Environmental Sciences Albert Ludwigs Universitat FreiburgAlbert Straße 23-B79104Freiburg Breisgau Germany Department of Ecology and Resources Management University of VendaPrivate BagX5050Thohoyandou0950LimpopoSouth Africa Department of civil and Environmental Universidad de la CostaCalle 58#55-66080002BarranquillaAtlanticoColombia

The Benue Trough Basin (BTB) of Nigeria is geologically and geo-morphologically subdivided into upper,middle, and lower segments. The BTB is the subject of geological research due to its rich coal depositsthat have the potential for oil and gas. The purpose of the present study is to examine the origins,depositional environments, and thermal history of the selected coals and the processes that influencetheir quality. coal samples from different open cast coal mines in the middle BTB were examined usingproximate and ultimate, x-ray diffraction (XRD), x-ray fluorescence (XRF), laser ablation induced coupledplasma (LA-IcPMS), and petrographical analyses. The coal samples contained mainly quartz, kaolinite,and organic carbon. The XRD spectra peaks revealed the triclinic and monoclinic structure of kaolin. TheSiO2/Al2O3 ratios confirmed the dominance of quartz and kaolinite. The Ni/co versus V/cr, cu/Zn, and V/Mo values in the studied coals suggest oxic depositional environments, whereas the V/(Ni þ V) and V/(V þ cr) values indicate oxic to suboxic conditions. The ce/ce* values are slightly below 1, which indicates a suboxic depositional environment. Maceral texture is indicative of transformations from subbituminous to high volatile c or B bituminous coal. The maceral components and mineral matter(10%) of the studied coals imply deposition in the planar margin mire, and a river system of planarmargin mire environments, respectively. The high gelification index (GI) and tissue preservation index(TPI) values indicate peat accumulation developed within a wet forest swamp. The ternary diagram ofthe maceral component suggests deposition in a wet moor environment with intermittent moderate tohigh flooding episodes. The studied coals are sub-hydrous vitrinite inferring hydrogen-poor and thermally immature characteristics. The low V and Ni contents, low H/c and high O/c, indicate Type IIIterrestrial organic matter with the potential to generate gaseous hydrocarbons. The investi

关键词： coal Maceral Trace elements Mineralogy Depositional environments

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Migmatite-like textures in anthracite:Further evidence for low-grade metamorphic melting and resolidification in high-rank coals

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Geoscience Frontiers 2021年第3期12卷 428-436页

作者： james c.hower Susan M.Rimmer Maria Mastalerz Nicola J.Wagner University of Kentucky center for Applied Energy Research 2540 Research Park DriveLexingtonKY 40511USA School of Earth Systems and Sustainability Southern Illinois University CarbondaleCarbondaleIL 62901USA Indiana Geological&Water Survey Indiana UniversityBloomingtonIN 47405USA Department of Geology University of JohannesburgJohannesburgSouth Africa

Previous studies demonstrated that melting,initiated by supercritical fluids in the 375-400℃range,occurred as part of anthracite metamorphism in the Appalachian *** on the known behavior of vitrinite at high temperatures and,to a lesser extent,at high pressures,it was determined that the duration of the heating,melting,and resolidification event was about 1 *** the current study,featureless vitrinite within banded maceral assemblages demonstratesthe intimate association of melted and resolidified vitrinite with anthracite-rank *** analogy with metamorphosed inorganic rocks,such associations represent diadysites and embrechites,i.e.,cross-cutting and layered migmatites,*** though the temperature of formation of the anthracite structures is several hundred℃lower than that seen in metamorphosed inorganic rocks,anthracites are metamorphic rocks and the nomenclature for metamorphic rocks may be appropriate for coal.

关键词： Igneous Metamorphic texture Pennsylvania Mesozoic basins South Africa

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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

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