Search for dissertations about: "clays adsorption"

Showing result 1 - 5 of 7 swedish dissertations containing the words clays adsorption.

  2. 1. Metal distribution and mobility under alkaline conditions

    Author : Mårten Dario; Bert Allard; Yngve Albinsson; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Adsorption; Colloids; Nuclear waste; Cement; Montmorillonite; miljökemi; Chemistry; Kemi; Kemi; Chemistry;

    Abstract : The adsorption of an element, expressed as its distribution between liquid (aquatic) and solid phases in the biogeosphere, largely determines its mobility and transport properties. This is of fundamental importance in the assessment of the performance of e.g. geologic repositories for hazardous elements like radionuclides. READ MORE

  4. 2. Synthesis and applications of low silica zeolites from Bolivian clay and diatomaceous earth

    Author : Javier Gustavo Garcia Mendoza; Johanne Mouzon; Niklas Hedin; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zeolites; Synthesis; clay; diatomite; adsorption; ion exchange; Chemical Technology; Kemisk teknologi;

    Abstract : The aim of the present work was to develop synthesis routes to produce synthetic zeolites with industrial attractiveness from non-expensive Bolivian raw materials, such as clays and diatomite. In particular, the work was focused on the synthesis of low-silica zeolites with the LTA and FAU structures. READ MORE

  5. 3. Aqueous surface chemistry of Goethite : adsorption and desorption reactions involving phosphate and carboxylic acids

    Author : Malin Lindegren; Per Persson; Staffan Sjöberg; Alan Stone; Umeå universitet; []
    Keywords : ;

    Abstract : Phosphorus is an essential element for all known forms of life. In the form of phosphate, this nutrient is retained in soils and sediments by sorption on mineral particles, clays and other soil constituents. READ MORE

  6. 4. Characterization of some natural and synthetic materials with silicate structures

    Author : Edwin Escalera; Farid Akhtar; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Konstruktionsmaterial; Engineering Materials; Materialteknik; Engineering Materials;

    Abstract : The present thesis deals with characterization of silicate structures with a determined morphology and structure such as ordered mesoporous silica and layered silicates. Mesoporous silica groups are amorphous solids exhibiting highly ordered pore structures with narrow pore size distributions and large surface areas. READ MORE

  7. 5. Iron in the Lena River basin, NE Russia : Insights from microscopy, spectroscopy and isotope analysis

    Author : Catherine Hirst; Carl-Magnus Mörth; Per Andersson; Mats Erik Åström; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; iron; reactivity; isotopes; permafrost; river; Arctic; Marine Geology; maringeologi;

    Abstract : Iron is an important mediator of biotic and abiotic processes on the Earth’s surface, being an electron acceptor in organic matter degradation, a surface for organic matter and trace element adsorption, and a required element for enzymatic processes during primary production. Yet, the role of iron as a mediator of carbon and trace element cycling in high latitude, permafrost-dominated regions remains poorly investigated. READ MORE