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Dissertations / Theses on the topic 'Inorganic ion exchangers'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Sylvester, Paul. "Extraction of cobalt and other metal ions from aqueous solutions using inorganic ion exchangers." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278137.

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2

Adams, Robert Jonathan Watt. "The extraction of caesium and cobalt(II) from solution using inorganic ion exchangers in electrochemical ion exchange." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385171.

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3

Bashir, Sadaqat. "The development and testing of novel inorganic hydrous oxide ion exchangers." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47351.

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4

Nzama, Nosipho Mercy. "Adsorptive separation of Ce Co Ru Sb and Sr ions using inorganic ion exchangers." Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/79295.

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Ion exchange and adsorption (can both be referred to as ‘sorption’) are widely used as purification and concentration methods in the nuclear industry. Various mathematic models have been developed to describe the mechanisms of sorption using the kinetics and equilibrium data. In this study, the ion exchange and adsorption capability and efficacy of various inorganic sorbent materials to remove contaminants were investigated with the intent of applying the process in the purification of post reactor uranium for reuse and cleaning of research reactors pool water. The contaminants studied are Ce,

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5

Medvedev, Dmitry Gennadievich. "Design, optimization, and selectivity of inorganic ion-exchangers for radioactive waste remediation." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2789.

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The processes of development of nuclear weapons resulted in accumulation of thousands of curies of high-level radioactive waste. Liquid waste produced in the US has been stored in carbon steel tanks in highly alkaline (1-3 M NaOH, 6 M sodium salts) media for fifty years and leakage has occurred. One of the approaches to the solution of the problem of radioactive waste is to adsorb the nuclides on highly selective ion-exchange material, solidify in a glass matrix and dispose in a geological formation. The use of the ion-exchange technology is limited by the time of the sorbent-solution contac

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6

Workman, Andrew David. "The extraction of cationic ruthenium species from aqueous media using layered inorganic ion exchangers." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317627.

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7

Möller, Teresia. "Selective crystalline inorganic materials as ion exchangers in the treatment of nuclear waste solutions." Helsinki : University of Helsinki, 2002. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/moller/.

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8

Jasem, Abdul K. J. "Comparative study between some novel and other known inorganic ion exchangers of the type insoluble acid salts of tetravalent metals." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305923.

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9

SANTOS, JACINETE L. dos. "Trocadores ionicos inorganicos a base de manganes e potassio para recuperacao e remocao de metais poluentes de efluentes aquosos." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10956.

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10

MANOSSO, HELENA C. "Utilizacao dos trocadores inorganicos ZrP e TiP no tratamento de rejeitos industriais e radioativos." reponame:Repositório Institucional do IPEN, 2001. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10919.

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11

PAGANINI, PAULA P. "Síntese e caracterização de trocadores iônicos inorgânicos a base de óxidos mistos estanho-titânio para utilização na recuperação de cádmio e níquel e estudos fotoluminescentes." reponame:Repositório Institucional do IPEN, 2007. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11575.

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12

BRAMBILLA, TANIA de P. "Estudo de materiais adsorvedores para o preparo de geradores de Ge-68/Ga-68." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10560.

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Made available in DSpace on 2014-10-09T12:41:57Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:43Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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13

Dzyazko, Yu S., N. F. Nikolskaya, V. E. Sosenkin, and Yu M. Volfkovich. "Composite inorganic matrix modified with ion-exchanger nanoparticles." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20582.

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The aim of the work was to elucidate a nature of charge-selective properties of macroporous composite inorganic membranes modified with nanoparticles of the ionexchanger, namely hydrated zirconium dioxide. The membrane was found to be selective towards anions in acidic media: membrane potential was registered in the solutions containing 10-100 mol m-3 HCl. Overlapping of intraporous diffusion constituents of electric double layer cannot be provided under these conditions. The membranes have been investigated using methods of standard contact porometry, potentiometry, scanning electron m

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14

Ichsan, E. A. W. "Ion exchange on chelating fibres." Thesis, University of Salford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353980.

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15

Dzyazko, Yu S., L. N. Ponomareva, Yu M. Volfkovich, et al. "Hybrid organic-inorganic nanocomposites for ion-exchange processes." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20577.

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Two types of composite ion-exchangers, which are based on strongly acidic gellike cation-exchange resin and zirconium hydrophosphate, have been obtained. The first group contains both inorganic nanoparticles and their aggregates, the second one contains only aggregates. Analysis of differential porogrammes obtained with a method of standard contact porometry allowed us to estimate porous structure both of polymer matrix and inorganic constituent. Each stripe of the porogrammes has been related to structure element of polymer and ZrPh. Geometrical globular model has been applied to estimate a

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16

Al-Hindi, Al-Attar Lina. "Nuclear waste treatment using novel inorganic ion exchange materials." Thesis, University of Salford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272932.

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17

Perriam, Joseph John. "Hybrid inorganic-organometallic catalysts derived from #alpha#-zirconium phosphate." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264608.

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18

Pannell, Daniel K. (Daniel Kirk). "Detector Comparison for Simultaneous Determination of Organic Acids and Inorganic Anions." Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc500456/.

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The research reported here is a study of detector systems to determine those most suited for simultaneous organic acid, inorganic anion determination. Comparisons are made on the basis of detection limits and sensitivities for conductivity, UV/Vis, photoconductivity, and derivative conductivity detection systems. The investigation was made using a constant chromatographic system with the only variable component being the detector system. Eluant optimization conditions for each detector are reported along with tables reporting detection limits and sensitivities for each detector system. Various

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19

Pitcher, Sarah. "Investigation of heavy metal removal from motorway stormwater using inorganic ion exchange." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/804873/.

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20

Koivula, Risto. "Inorganic ion exchanger for decontamination of radioactive wastes generated by the nuclear power plants." Helsinki : University of Helsinki, 2003. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/koivula/.

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21

Mardegan, Marco <1983&gt. "Luminescent down-shifting glasses for solar applications obtained by ion exchange." Doctoral thesis, Università Ca' Foscari Venezia, 2014. http://hdl.handle.net/10579/5618.

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To verify the possibility of realizing down-shifting phenomena inside photovoltaic cover glass panels, silicate glasses where doped by ion exchange process. Different salt mixtures were compared. The effectiveness of the improvement of the power produced by a photovoltaic panel covered by the doped glasses was also tested by a home-made system acting as a solar simulator. The trends obtained from the characterization have been interpreted on the basis of changes on the optical basicity degree along the exchanged layers. A preliminary study is proposed about the relation between the optical bas

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22

Jones, Vonda K. (Vonda Kaye). "Methods Development for Simultaneous Determination of Anions and Cations by Ion Chromatography." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc330724/.

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The problem with which this research is concerned is the determination of inorganic anions and cations with single injection ion chromatography. Direct detection of the separated analyte ions occurs after the analyte ions have passed through ion-exchange resins where they are separated according to their affinity for the ion-exchange resin active sites. The techniques involve the use of essentially a non-suppressed ion chromatographic system followed by a suppressed ion chromatographic system. With this system it is possible to accomplish both qualitative and quantitative determinations.

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23

Glabman, Shira. "Effect of inorganic filler size on nanocomposite ion exchange membranes for salinity gradient power generation." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54311.

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Reverse electrodialysis (RED) is a technique that can capture electrical potential from mixing two water streams of different salt concentration through permselective ion exchange membranes. Effective design of ion exchange membranes through structure optimization is critical to increase the feasibility of salinity gradient power production by RED. In this work, we present the preparation of organic-inorganic nanocomposite cation exchange membranes containing sulfonated polymer, poly (2,6-dimethyl-1,4-phenylene oxide), and sulfonated silica (SiO2-SO3H). The effect of silica filler size at vari

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24

Locke, William John. "Ion exchange properties and some intercalation compounds of the antimony hydrogen phosphate HSb(POâ†4)â†2.xHâ†2O." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239775.

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25

Selbe, Tyler J. "Applications of aluminosilicate and zincosilicate materials: aqueous phase ion exchange and gas phase adsorption." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/7057.

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Doctor of Philosophy<br>Department of Chemical Engineering<br>Jennifer L. Anthony<br>Zeolites and zeolite-like materials have well-ordered structures and pores creating varying capacities for molecules based upon size, functional groups, polarity, and intermolecular forces making the materials useful for molecular sensing as well for molecules that are considered hazardous at very low concentrations with reproducible results because of these properties. This study will identify and characterize applications for zeolite and zeolite-like materials in gas and liquid phases based upon the dominat

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26

Gustin, Lea. "Synthesis and Topochemical Manipulation of New Layered Perovskites." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2149.

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Metastable layered perovskites containing interlayer transition metals can readily be obtained by simple ion exchange reactions on receptive hosts, such as those of the Dion-Jacobson and Ruddlesden-Popper structure types. In this work, we focused on adding to the library of layered perovskites by not only creating new compounds, but by also showing their ability to be further manipulated, and by studying the stability of the series through thermal behavior studies. The reactions with transition metal halides are particularly interesting since they often lead to novel architectures and magnetic

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27

Quattrini, Federico. "Emerging Techniques for Inorganic Metal Speciation and Bioavailability." Doctoral thesis, Universitat de Lleida, 2018. http://hdl.handle.net/10803/664422.

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El coneixement profund de la especiació dels metalls pesants és clau per a determinar la seva biodisponibilitat. Per això cal complementar la informació sobre les concentracions amb la informació sobre els fluxos d’internalització. Diverses tècniques analítiques han estat desenvolupades amb aquesta fi, i algunes d’elles aprofiten les propietats de les resines d’intercanvi iònic o quelants. D’una banda, aquesta tesi investiga la velocitat d’acumulació d’ions metàl·lics a la resina Chelex 100, sigui experimentalment o a través d’un model teòric. Aquesta interpretació permet descriure els efec

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28

Montasserasadi, Dariush. "New Dion-Jacobson and Ruddlesden- Popper Layered Perovskites prepared by Topochemical Methods." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/1985.

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Layered perovskites can be classified in three major groups: Dion-Jacobson AA′n-1BnO3n+1, Ruddlesden-Popper A2A′n-1BnO3n+1,and Aurivillius phase (Bi2O2)A′n-1BnO3n+1. (A: Alkali metal, Alkali-earth metal; A′: Lanthanides and Bi; B: Ti, Nb, Ta; n: thickness of slabs). For more than two decades researchers have shown much interest in this series because of their magnetic and electrical properties. Tuning synthesis parameters such as temperature, time, and host structure can be used to direct such properties. Low temperature synthetic methods (topochemical methods) allow the preparation of compoun

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29

Zhang, Zhenjie. "Template-Directed Synthesis and Post-Synthetic Modification of Porphyrin-Encapsulating Metal-Organic Materials." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5162.

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Metal-organic materials (MOMs) represent an emerging class of materials comprised of molecular building blocks (MBBs) linked by organic linker ligands. MOMs recently attract great attention because of their ability to exhibit permanent porosity, thereby enabling study of properties in the context of gas storage, gas separation, solid supports for sensors, catalysis and so on. Although MOMs have been studied for over 60 years, the porous nature of MOMs was not systematically and widely explored until the early 1990's. This may be one of the reasons why template-directed synthesis of MOMs remain

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30

ZEN, HELOISA A. "Desenvolvimento de elastômeros fluorados multifuncionais baseados em nanocompósitos." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23741.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2015-06-11T18:00:50Z No. of bitstreams: 0<br>Made available in DSpace on 2015-06-11T18:00:50Z (GMT). No. of bitstreams: 0<br>Tese (Doutorado em Tecnologia Nuclear)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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31

Gédéon, Antoine. "Contribution a l'etude par rmn (**(1)h et **(129)xe) des zeolithes my (m = na**(+), ni**(2+), cu**(2+) et co**(2+)) : adsorption d'eau et d'ammoniac." Paris 6, 1987. http://www.theses.fr/1987PA066390.

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L'application de la rmn **(129)xe permet de suivre l'evolution du libre parcours moyen du xenon adsorbe utilise comme sonde en fonction de la concentration en eau d'une zeolite nay. De plus, l'adsorption de l'ammoniac sur la zeolite y modifiee par echange de cations metalliques, a montre que la rmn-**(1)h permet de suivre la reconstitution des complexes ammoniaques en fonction de la temperature de pretraitement du solide et de la concentration en nh::(3) adsorbe ou desorbe

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32

Ponton, Lisa M. "Coupling Temperature Control with Electrochemically Modulated Liquid Chromatography Fundamental Aspects and Applications." Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/835378-qpyPNX/webviewable/.

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19 Dec 2004.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "IS-T 1944" Lisa M. Ponton. 12/19/2004. Report is also available in paper and microfiche from NTIS.

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33

Caisso, Marie. "Etude structurale de la synthèse de microsphères d’U1-xAmxO2±δ dédiées à la fabrication de couvertures chargées en américium". Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT204/document.

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Une des voies à l’étude permettant de réduire l’inventaire des déchets nucléaires, après recyclage du plutonium, est la transmutation hétérogène, en réacteurs à neutrons rapides, de l’américium (Am) en éléments chimiques à demi-vies courtes, voire stables. L’irradiation de l’Am nécessite la fabrication de pastilles d’U1-XAmXO2±δ. La voie CRMP (Calcined Resin Microsphere Pelletization) est actuellement privilégiée parmi les différents procédés envisagés. Elle se base, avant frittage, sur le pressage de microsphères d’oxyde mixte U1-XAmXO2±δ obtenues par conversion thermique de microsphères de r

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34

Mamadou, Koné. "Elaboration de materiaux inorganiques polymeres a base d'antimoine v : comparaison de leurs caracteristiques en dispersion aqueuse et a l'etat solide." Paris 6, 1987. http://www.theses.fr/1987PA066506.

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Preparation de polymeres mixtes en ajoutant un heteroelement a de l'acide antimonique frais. Les composes molybdoantimoniques se presentent sous la forme de particules octaedriques cristallisees dans le systeme pyrochlore ayant une charge de surface relativement elevee. Les composes silicoantimoniques conservent aussi la structure pyrochlore de l'acide antimonique

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35

Tyburce, Bernard. "Application de l'échange ionique à la caractérisation des zéolithes." Poitiers, 1987. http://www.theses.fr/1987POIT2036.

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36

Ponsot, Inès. "Glasses and Glass-Ceramic Components from Inorganic Waste and Novel Processing." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424636.

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Thanks to European environmental rules and regulations establishment, waste recycling has become a more and more relevant problematic. For manufacturing plants, especially those producing hazardous wastes, expenses linked to waste production have drastically increased over the last decades. In the proposed work, various hazardous and non-hazardous wastes, among: soda-lime and borosilicate glass cullet, cathode ray tubes glass, exhausted lime from fume abatement systems residues, sludge and slags from ferrous and non-ferrous metallurgy, and pre-stabilized municipal solid waste incinerators ashe

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37

Aka, Gérard. "Alumino-gallates de sodium-lanthanide de type alumine beta, magnetoplombite ou mixte : cristallochimie, etude spectroscopique et proprietes physiques." Paris 6, 1988. http://www.theses.fr/1988PA066008.

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Obtention des composes a structure mixte par echange ionique en sel fondu d'ions lanthanides trivalents sur les cristaux d'aluminogallate de sodium, na::(1+y)(al::(1-x)ga::(x))::(11) o::(17+(y/2)), obtenus par la methode du fondant, avec 0,5y1 et 0x0,5. Caracterisation par des mesures de susceptibilite magnetique et conductivite electrique. Analyse des spectres rpe pour localiser les ions lanthanides dans les structures de type alumine beta ou mixte, pour lesquelles les etudes d'absorption optique, de fluorescence et de declin de fluorescence indiquent des proprietes optiques differentes des i

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38

Salama, Farid. "Etude de la photoexcitation dans l'ultra-violet lointain des halogènes piégés en matrice de gaz rare à basse température et étude de leur ionisation simple et double par impact protonique en phase gazeuse." Paris 6, 1986. http://www.theses.fr/1986PA066213.

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I. Etude des mécanismes de relaxation mis en jeu dans Cl2, Br2, I2 isolés en matrice, après excitation en UV proche ou lointain : émission structurée (transitions vibroniques) pour Cl2en UV proche et transitions électroniques avec interaction Rydberg-Valence en UV lointain; émission dans le visible pour Br2 et I2 quelle que soit l'énergie d'excitation; étude théorique des processus de relaxation. II. Observation d'ions moléculaires simplement ou doublement chargés, formés par échange de charge simple ou double étudié par spectrométrie de translation; analyse des règles de sélection : conservat

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39

Oyetola, Samuel. "Synthese et etude des composes a**(i)m**(v)p::(2)o::(8) (a = k, rb, cs; m = sb, nb, mo, ta) et des acides echangeurs ioniques hm**(v)(po::(4))::(2),xh::(2)o (m = sb, ta), nouveaux types de luminophores potentiels : les phases (m'**(iii)::(1/2)m**(v)::(1/2))p::(2)o::(7) (m'=sb, bi, ln; m=sb, nb, ta)." Nantes, 1988. http://www.theses.fr/1988NANT2008.

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Premilere partie: la plupart des phases du titre ont une structure en couches voisine de celle de zrp-alpha. Le traitement en milieu acide des phases en couches km**(i)(po::(4))::(2), m=sb, ta permet d'obtenir les acides correspondant hm**(v)(po::(4))::(2)xh::(2)o. Un autre acide, hta(po::(4))::(2) 3d, peut etre obtenu directement par voie seche, description de sa structure tridimensionnelle. Determination de la teneur en eau, de la structure et du comportement thermique de ces differents acides dont la thermolyse conduit a des phases originales qui sont etudiees. Seconde partie: dans la premi

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40

邱文誠. "Capillary electrophoretic separation of inorganic and organic anions, sulfonaphthols and sulfonamides:the studies of separation mechanisms and effect of functional group of ion-exchangers." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/35802802893881083302.

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41

Kney, Arthur D. "Synthesis and characterization of a new heavy-metal-selective inorganic ion exchanger /." Diss., 1999. 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:9935165.

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42

Cook, Helmy Alicia. "Zwitterionic ion chromatography." Thesis, 2003. https://eprints.utas.edu.au/19156/1/whole_CookHelmyAlicia2003_thesis.pdf.

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This work presents a comprehensive study on Zwitterionic Ion Chromatography (ZIC) for the separation of inorganic ions. The elution characteristics of anions on a sulfobetaine-type stationary phase are examined and it is shown that the Hofineister series could be used to predict the elution order, with retention increasing with increasing polarisability, as well as the effect of the mobile-phase anion on retention of anions. A mobile-phase anion with a greater polarisability than the analyte anion reduced retention, and vice versa. An increase in anion retention was also observed in cha

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43

Hilder, EF. "Ion-exchange capillary electrochromatography of inorganic and small organic anions." Thesis, 2001. https://eprints.utas.edu.au/20478/1/whole_HilderEmilyFrances2001_thesis.pdf.

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This work presents a systematic study on the use of packed column ion-exchange capillary electrochromatography (IE-CEC) for the separation of ionic analytes. Methods have been developed for preparing packed capillary columns utilising either silica-based or polymer-based stationary phases. The stationary phase is retained by frits prepared by sintering either the silica-based packing material or pure silica. The electroosmotic and pressure-driven properties of frits prepared from bare or functionalised silica were investigated. Despite the high temperature of heating of the packing, sufficien

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44

De, Villiers Wessel van Zyl. "Die struktuur en eienskappe van anorganiese ioonruilers en die toepassing daarvan in die behandeling van radioaktiewe afval." Thesis, 2014. http://hdl.handle.net/10210/9109.

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D.Sc.<br>The ion exchange properties of a number of synthetic inorganic ion exchangers and the natural zeolite, clinoptilolite, were evaluated with respect to the elements Na, Cs, Sr, Ba, Ce(III), Eu, Zr, U(VI), Np(V), PU(IV) and Am(III). The role of the structure of crystalline exchangers in determining the selectivity thereof, especially in the case of clinoptilolite, was also investigated. Hydrated antimony pentoxide and antimonic acid showed high sorption of a number of ions over a wide pH range (2 - 10). The selectivity order of hydrous oxides for the actinides was as follows: PU(IV) > Am

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Breadmore, MC. "Capillary electrochromatography of inorganic and small organic anions using pseudo and wall-coated ion exchange phases." Thesis, 2001. https://eprints.utas.edu.au/19124/1/whole_BreadmoreMichaelCharles2001_thesis.pdf.

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This work presents a systematic study on the use of pseudo-phase and wall-coated ion-exchange (IE) phases for the separation of anions by ion-exchange capillary electrochromatography (IE-CEC). The viability of using open tubular (OT) columns prepared by adsorbing small cationic particles onto the capillary wall for the selectivity manipulation of inorganic anions by IE-CEC was examined. The introduction of an IE component into the separation mechanism allowed the separation selectivity to be varied by changing the type and concentration of the electrolyte anion. This enabled the migrati

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Harvey, Omar R. "Mechanisms of Organic-inorganic Interactions in Soils and Aqueous Environments Elucidated using Calorimetric Techniques." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7727.

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Organic matter is ubiquitous in the environment and exists in many different forms. Reactions involving organic matter are diverse and many have significant economic and environmental implications. In this research, calorimetric techniques were used to study organic- inorganic reactions in two different systems. The primary objectives were to elucidate potential mechanism(s) by which: (i) natural organic matter (NOM) influences strength development in lime-stabilized soils, and; (ii) plant-derived biochars reacts with cations in aqueous environments. Natural organic matter influenced strength

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Muiambo, H. F. (Herminio Francisco). "Inorganic modification of Palabora vermiculite." Diss., 2011. http://hdl.handle.net/2263/29010.

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Conventional processes for the manufacture of exfoliated natural vermiculite employ temperatures exceeding 800 °C and the onset temperature is above 450 °C. In many applications, notably fire retardants, it is desirable that exfoliation of vermiculite should occur at temperatures in the range of 200 °C to 350 °C. For this purpose, South African Palabora vermiculite was modified by ion exchange with ammonium and selected alkali metal and alkaline earth metal ions. These expeiments were performed at room temperature using an orbital shaker for 15 days. Another set of experiments was performed by

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Burns, Jonathan. "Development of Pillared M(IV) Phosphate Phosphonate Inorganic Organic Hybrid Ion Exchange Materials for Applications in Separations found in the Nuclear Fuel Cycle." Thesis, 2012. http://hdl.handle.net/1969.1/148358.

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This dissertation focuses on key intergroup and intragroup separations found in the back end of the nuclear fuel cycle, specifically americium from lanthanides and americium from other actinides, most importantly americium from curium. Our goal is to implement a liquid-solid separation process to reduce waste and risk of contamination by the development of metal(IV) phosphate phosphonate inorganic organic hybrid ion exchange materials with the ideal formula of M(O6P2C6H4)0.5(O3POA) * nH2O, where M = Zr or Sn, A = H or Na. These materials have previously shown to have high affinity for Ln, this

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Tiwary, Satish Kumar. "Spin State And Exchange In Potassium Thioferrate(III) And Cobalt(II) Tris(Bipyridyl) Complex Ions Encapsulated In Zeolite-Y." Thesis, 1996. https://etd.iisc.ac.in/handle/2005/1837.

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Tiwary, Satish Kumar. "Spin State And Exchange In Potassium Thioferrate(III) And Cobalt(II) Tris(Bipyridyl) Complex Ions Encapsulated In Zeolite-Y." Thesis, 1996. http://etd.iisc.ernet.in/handle/2005/1837.

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