Dissertations / Theses on the topic 'Clay minerals'
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Bachmaf, Samer. "Uranium sorption on clay minerals." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2010. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-62404.
Full textCrawford, R. J. "Interparticle forces in clay minerals." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291033.
Full textHumes, R. "Interparticle forces in clay minerals." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370276.
Full textMakihara, Hiroshi. "Water film thickness in the clay-water system." Diss., The University of Arizona, 1999. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1999_20_sip1_w.pdf&type=application/pdf.
Full textUmar, I. M. "Uptake of fission products onto clay minerals." Thesis, University of Salford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376882.
Full textEdge, J. S. "Hydrogen adsorption and dynamics in clay minerals." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1462102/.
Full textChow, John Kam Keung. "Sorption of radionuclides onto clay minerals and soils." Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241543.
Full textBray, Helen Jane. "Kinetics of high-temperature transformations of clay minerals." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249204.
Full textMichael, Paul J. "Studies of clay minerals and their decomposition products." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9813/.
Full textSunwar, Chandra Bahadur. "Interaction of some thiazine dyes with clay minerals." Thesis, University of North Bengal, 1985. http://hdl.handle.net/123456789/847.
Full textThomas, Susan Murphree. "The synthesis and characterization of novel, inorganically pillared molecular sieves." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/30891.
Full textBishop, Michael Edward. "MICROBIAL REDUCTION OF FE(III) IN MULTIPLE CLAY MINERALS BY SHEWANELLA PUTREFACIENS AND REACTIVITY OF BIOREDUCED CLAY MINERALS TOWARD TC(VII) IMMOBILIZATION." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1291059786.
Full textUgochukwu, Uzochukwu Cornelius. "Biodegradation of crude oil hydrocarbons supported on clay minerals." Thesis, University of Newcastle Upon Tyne, 2011. http://hdl.handle.net/10443/1329.
Full textZhang, Li. "Clay Minerals Supporting Microbial Metabolic Activities in Natural Sediments." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1564142598119446.
Full textFuller, Adam James. "Caesium and strontium sorption to sediment and clay minerals." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7481/.
Full textSoto, Chris. "Do Clay Minerals affect the thickener operationin Chuquicamata mine, Calama, Chile?" Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77458.
Full textMcCann, Graham Francis. "The study of layered materials and their intercalated compounds." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358320.
Full textHinds, Ian Charles. "Characterisation of colloids by electric birefringence." Thesis, London South Bank University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336307.
Full textPersons, Andrea Karen. "Use of the Lowry and Bradford Protein Assays to measure bacterial abundances in a sandstone reservoir." Master's thesis, Mississippi State : Mississippi State University, 2003. http://library.msstate.edu/etd/show.asp?etd=etd-11102003-120611.
Full textBose, Himangshu Sekhar. "Metachromatic behaviour of some thiazine dyes in solution in presence of inorganic and organic electrolytes, surfactants, polyelectrolytes and clay minerals." Thesis, University of North Bengal, 1986. http://hdl.handle.net/123456789/731.
Full textAkar, Dilek Shahwan Talal. "Physicochemical characterization of the sorption behavior of Cs+ and Sr2+ Ions on natural kaolinite and cliptilolite minerals/." [s.l.]: [s.n.], 2005. http://library.iyte.edu.tr/tezler/master/kimya/T000489.pd.
Full textZHANG, JING. "INTERACTION OF METHANOGENS WITH CLAY MINERALS, ORGANIC MATTER, AND METALS." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1389881682.
Full textLiu, Jibin. "Heteroaggregation of Silver Nanoparticles with Clay Minerals in Aqueous System." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408927952.
Full textZhao, Linduo. "Iron redox process in clay minerals and its environmental significance." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1438388284.
Full textOlson, Tyler Lee. "Reduction of nitroaromatic compounds by iron(ii) reduced clay minerals." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/1375.
Full textVlack, Yvette A. "A Diffuse Spectral Reflectance Library of Clay Minerals and Clay Mixtures within the VIS/NIR Bands." Kent State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=kent1227006436.
Full textAndrea, Martijn. "The anisotropic elastic properties of clay-rich rocks." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243413.
Full textRêgo, Eric Siciliano. "Variation of minerals and clay minerals recorded in the Neo-Tethys (central Turkey): new evidence of climatic changes during the middle Eocene." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/21/21136/tde-23032018-152550/.
Full textMinerais e argilominerais em sucessões sedimentares são excelente ferramentas para a reconstrução de condições ambientais. Dado o estado de preservação dos argilominerais, é possível identificar como eles foram formados, fornecendo informação sobre as condições de intemperismo no continente e sobre condições geoquímicas na coluna d\'água. Este estudo apresenta novos dados mineralógicos da seção de Baskil, uma sucessão do Eoceno médio altamente preservada no Neo-Tethys (Turquia central). Uma mudança na assembléia mineralógica com maiores concentrações de ilita e clorita (subseção I) para um intervalo dominante de esmectita detrítica (subseção II) caracteriza uma mudança na área de fonte de rochas metamórficas para rochas ígneas e mudanças de condições de intemperismo físico para intemperismo químico. Este período coincide com o Ótimo Climático do Eoceno Médio (MECO), indicando uma assinatura mineralógica do evento. A paligorsquita autigênica teve um aumento na porção media e superior da seção, indicando condições favoráveis na coluna de água para a sua formação. Possívelmente as condições na circulação do oceano naquela região mudaram após 40 Ma, formando uma coluna de água estratificada com condições mais quentes e salinas em profundidades maiores, favorecendo precipitação de paligorsquita e dolomita. A evolução mineralógica da seção de Baskil reflete como as fontes e os regimes de intemperismo mudaram ao longo do tempo, e como essas mudanças podem estar relacionadas aos processos globais (e.g. MECO) e /ou a processos locais e regionais.
Stirner, Manuela [Verfasser], and Josef [Akademischer Betreuer] Breu. "Clay linked Gels : Mechanical Enhancement of Hydrogels by Incorporation of Clay Minerals / Manuela Stirner. Betreuer: Josef Breu." Bayreuth : Universität Bayreuth, 2014. http://d-nb.info/1095663593/34.
Full textSato, K. "Local Molecular Structures Induced by Water Adsorption/Desorption in Smectite Minerals." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35185.
Full textVillemure, Gilles. "Photochemical applications of the intercalation of organic cations in clay minerals." Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/21389.
Full textChermak, John Alan. "The kinetics and thermodynamics of clay mineral reactions." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54505.
Full textPh. D.
Hall, Anne Marie. "The clay mineralogy of the lower San Andres formation, Palo Duro Basin, Texas." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/25880.
Full textNeumann, Anke. "Assessing the redox reactivity of ferrous iron species associated with clay minerals /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18056.
Full textJaisi, Deb Prasad. "Fe(III) reduction in clay minerals and its application to technetium immobilization." Oxford, Ohio : Miami University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1179946951.
Full textDaneshvar, Ehsan. "Role of provenance on clay minerals and their distribution in modern estuaries." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540028.
Full textRoch, Gabriela Ellen. "A solid state NMR investigation of the thermal transformations of clay minerals." Thesis, University of Kent, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297345.
Full textCastro, Smirnov Fidel Antonio. "Physicochemical characterization of DNA-based bionanocomposites using nonafibrous clay minerals : biological applications." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112260/document.
Full textAmong the various clay minerals, sepiolite, which is a natural fibrous silicate, isa potential promising nanocarrier for the non-viral transfer of bio-molecules. Indeed,sepiolite has been shown to interact with biological molecules such as lipids,polysaccharides and proteins. Here, we show that sepiolite efficiently binds differenttypes of DNA molecules (genomic, plasmid, single strand and double strandoligonucleotides), introducing the first detailed study on the interaction mechanismsbetween sepiolite and DNA, as well as the physicochemical characterization of theresulting DNA-sepiolite bionanocomposites. The interaction mechanisms aresuggested to be electrostatic interactions, van der Waals forces, cation bridges, andhydrogen bonding. Spectroscopy analysis showed that the binding of DNA to sepiolitewas increased by polycations with valence dependent efficiency, and the DNApreviously adsorbed could be recovered with an efficiency that could be modulatedusing a chelating agent (EDTA), preserving the DNA structure and biological activity.Fourier-transform infrared spectroscopy identified the external silanol groups as themain sites of interaction with the DNA. It was proved that it is possible to use sepiolitefor extracting DNA from bacteria, for DNA purification and for purification from bacterialcontamination. By combining fluorescence microscopy, transmission electronmicroscopy (TEM), time-lapse video microscopy and flow cytometry analysis (FACS),we show that sepiolite can be spontaneously internalized into mammalian cells throughboth endocytic and non-endocytic pathways. As a proof of concept, we show thatsepiolite is able to stably transfer plasmid DNA into bacteria and mammalian cells. Itwas also proved that with the incubation of bacteria with the Sep/DNAbionanocomposite initially prepared in the presence of a low concentration of divalentcation, and using sonicated sepiolite (sSep), it is possible to increase the bacterialtransformation efficiency from 20 to 30-fold compared to previously reported methodswhich are based in the “Yoshida effect”. Additionally, we show that the efficiency ofsepiolite-mediated gene transfer can be optimized: the use of sSep and the exposureto the endosome disrupter chloroquine 100-fold and 2-fold stimulated DNA transfectionefficiency, respectively. These results open the way to the use of sepiolite-basedbionanocomposites as a novel class of hybrid nanocarriers for both potential genetherapy and the development of novel biological models of interest for academic andapplied sciences
Paiva, Lucilene Betega de. "Estudo do potencial de bentonitas nacionais e argentinas na obtenção de bentonitas organofilicas em dispersão aquosa e meio semi-solido visando a aplicação em nanocompositos polimericos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267122.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
Made available in DSpace on 2018-08-14T07:32:02Z (GMT). No. of bitstreams: 1 Paiva_LucileneBetegade_D.pdf: 25147063 bytes, checksum: a98b5c9f475d3fb0e39af5793bb3acee (MD5) Previous issue date: 2009
Resumo: Sete bentonitas foram avaliadas quanto ao potencial na obtenção de formas organofílicas, através da caracterização por difração de raios-X para avaliar os espaçamentos basais, pelo teste de inchamento, em água e em xileno, para avaliar o caráter a hidrofílico e organofóbico, por energia dispersiva de raios-X para identificar os elementos presentes, e da capacidade de troca de cátions pelo método de adsorção do azul de metileno. Somente uma não apresentou potencial para organofilização e foi descartada. As bentonitas que apresentaram potencial para serem organofilizadas, foram tratadas com um sal quaternário de amônio por troca de cátions em dispersão aquosa, metodologia convencionalmente usada, e intercalação em meio semi-sólido, como metodologia alternativa. Posteriormente, as bentonitas foram caracterizadas por difração de raios-X, para avaliar intercalação dos cátions orgânicos, pelo teste de inchamento, em água e em xileno, para avaliar o caráter organofílico e hidrofóbico adquirido, por energia dispersiva de raios-X para identificação dos elementos presentes. Adicionalmente, ambas bentonitas sódicas e organofilizadas, foram caracterizadas por análise termogravimétrica para avaliar a estabilidade térmica e o teor de cátions orgânicos incorporado, por microscopia eletrônica de varredura para avaliar a morfologia das partículas e por medida da área específica baseada na adsorção de nitrogênio. Todas as bentonitas adquiriram caráter organofílico. Foram preparados nanocompósitos com polipropileno e as bentonitas organofílicas obtidas. Após o processamento, foi feita uma caracterização por difração de raios-X e por microscopia eletrônica de transmissão para avaliar a dispersão das bentonitas organofílicas na matriz polimérica e o tipo de estrutura formada. Foram obtidos nanocompósitos com estruturas esfoliadas, parcialmente esfoliadas e intercaladas, e intercaladas. O estudo mostra uma grande potencialidade das bentonitas em estudo na obtenção de bentonitas organofílicas para nanocompósitos poliméricos, bem como a eficiência da metodologia de organofilização em meio semi-sólido.
Abstract: Seven bentonites were evaluated to verify the potential to obtain the organophilic clay. The characterization by X-ray diffraction to evaluate the basal spacings was made, as well as the characterization by swelling capacity test, in water and in xylene, to evaluate the hydrophilic and organophobic character, by X-ray dispersive energy to indentify the present elements, and by cations exchange capacity using the method of blue methylene adsorption. Only one bentonite didn't show potential to be organophilized and was rejected. The bentonites that showed potential to be organophilized, were treated with a quaternary ammonium salt by cation exchange in aqueous dispersion, the conventional methodology used, and by intercalation in semi-solid medium, as an alternative methodology. Subsequently, they were characterized by X-ray diffraction, to evaluate the intercalation of the organic cations, by the swelling capacity test, in water and in xylene, to evaluate the organophilic and hidrophobic acquired, by X-ray dispersive energy to identify the present elements. Furthermore, both sodium and organophilized bentonites were characterized by thermogravimetric analysis to evaluate the thermal stability and the tenor of organic cations incorporated, by scanning electronic microscopy to evaluate the morphology of the particles, and by measurement of specific area based on the adsorption of nitrogen. All bentonites acquired organophilic character. Nanocomposites with polypropylene as matrix and the organophilic bentonites obtained were prepared. After the processing, a characterization by X-ray diffraction and by transmission electronic microscopy to evaluate the dispersion of the organophilic bentonites in the polymeric matrix and the type of structure formed were made. Nanocomposites with exfoliated, or partially exfoliated and intercalated, and intercalated structures were obtained. The study shows a large potential of the bentonites in study in obtaining organophilic bentonites for polymeric nanocomposites, as well as the efficiency of the methodology of organophilization in semi-solid medium.
Doutorado
Ciencia e Tecnologia de Materiais
Doutor em Engenharia Química
Morkel, Jacqueline. "Kimberlite weathering mineralogy and mechanism /." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-07212007-104241.
Full textVelazquez, Tzayhri Gallardo. "A study on pillared clays." Thesis, University of Salford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252970.
Full textMcConville, Caspar J. "Related microstructural development on firing kaolinite, illite and smectite clays." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299540.
Full textBowman, Ryan Lee. "CLAY MINERAL TRANSFORMATIONS IN ACIDIC ENVIRONMENTS: FINDING AN EARTHEN ANALOGUE TO THE SURFACE OF MARS." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2608.
Full textWilcox, Jeffrey Kendall. "Influence of pH on zinc adsorption by kaolinite, montmorillonite, and Londonderry clay." Thesis, The University of Sydney, 1994. https://hdl.handle.net/2123/26746.
Full textMashburn, Courtney Dyan. "Laboratory studies on the heterogeneous chemistry of clay minerals in the Earth's atmosphere." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3239413.
Full textZhao, Qian. "Molecular dynamics simulation of interactions between clay minerals and a controlled organic phase." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47650.
Full textGeatches, Dawn Lesley. "Clay minerals and their gallery guests : an ab initio investigation into their interactions." Thesis, Durham University, 2011. http://etheses.dur.ac.uk/749/.
Full textBakker, Eleanor. "The impact of plant growth and potassium uptake on clay minerals in soil." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAU012/document.
Full textPotassium is an essential nutrient for plant growth and development. Clay minerals in soils represent an important reservoir of plant-available K. Extraction of fixed K from the interlayer space of micaceous 2:1 minerals can lead to an increase in the layer-to-layer distance which can be measured by X-ray diffraction. Samples from the Morrow Plots continuous corn (C) and corn-oats-hay (R) experiment, from fertilised (F) and non-fertilised (U) subplots for the years 1904, 1957, 1980, 1997 and 2013-2014 were subjected to sequential size-fractionation to obtain the silt fraction (50-2 um) and clay-sized subfractions (2-0.2, 0.2-0,05 and <0.05 um). Granulometric results show siginificant heterogeneity despite the small size of the MP, and a gain in <0.05 um subfraction with time. Full-profile fitting of X-ray diffraction patterns was performed to obtain conclusive identification of the clay mineral assemblage and assess the impact of 110-years of continuous agriculture and different agronomic practices. A complex clay mineral assemblage was identified with up to eleven different contributions necessary to reproduce the experimental data of <2 um subfractions, including up to six illite-smectite-chlorite mixed-layers. Quantitative phase analysis for all subplots and years showed that the mineral assemblage of the MP is similar between different subplots, regardless of agronomic treatment. No significant evidence of alteration or transformation of clay mineral phases was observed over time. The dioctahedral nature of the clay minerals of the MP disfavours K-extraction and thus dissolution is the favoured mechanism for K-uptake and the loss of 2-0.2 and 0.2-0.05 um subfractions is attributed to this process
Sharma, Alok. "Molecular Dynamics simulation of rock and clay minerals to estimate their mechanical properties." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/40928.
Full textMaster of Science
Lewis, Tara Marie. "Sorption of metals to clay minerals in the presence of complexing organic ligands." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/34211.
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