The effect of silica on polymorphic precipitation of calcium carbonate : an on-line energy-dispersive X-ray diffraction (EDXRD) study

Lade...
Vorschaubild
Dateien
Zu diesem Dokument gibt es keine Dateien.
Datum
2013
Autor:innen
Glaab, Fabian
Klein, Regina
Melero-García, Emilio
Kunz, Werner
García-Ruiz, Juan Manuel
Herausgeber:innen
Kontakt
ISSN der Zeitschrift
Electronic ISSN
ISBN
Bibliografische Daten
Verlag
Schriftenreihe
Auflagebezeichnung
URI (zitierfähiger Link)
DOI (zitierfähiger Link)
ArXiv-ID
Internationale Patentnummer
Angaben zur Forschungsförderung
Projekt
Open Access-Veröffentlichung
Sammlungen
Core Facility der Universität Konstanz
Gesperrt bis
Titel in einer weiteren Sprache
Forschungsvorhaben
Organisationseinheiten
Zeitschriftenheft
Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published
Erschienen in
Nanoscale. 2013, 5(15), pp. 7054-7065. ISSN 2040-3364. eISSN 2040-3372. Available under: doi: 10.1039/c3nr00301a
Zusammenfassung

Calcium carbonate is the most abundant biomineral and a compound of great industrial importance. Its precipitation from solution has been studied extensively and was often shown to proceed via distinct intermediate phases, which undergo sequential transformations before eventually yielding the stable crystalline polymorph, calcite. In the present work, we have investigated the crystallisation of calcium carbonate in a time-resolved and non-invasive manner by means of energy-dispersive X-ray diffraction (EDXRD) using synchrotron radiation. In particular, the role of silica as a soluble additive during the crystallisation process was examined. Measurements were carried out at different temperatures (20, 50 and 80 °C) and various silica concentrations. Experiments conducted in the absence of silica reflect the continuous conversion of kinetically formed metastable polymorphs (vaterite and aragonite) to calcite and allow for quantifying the progress of transformation. Addition of silica induced remarkable changes in the temporal evolution of polymorphic fractions existing in the system. Essentially, the formation of calcite was found to be accelerated at 20 °C, whereas marked retardation or complete inhibition of phase transitions was observed at higher temperatures. These findings are explained in terms of a competition between the promotional effect of silica on calcite growth rates and kinetic stabilisation of vaterite and aragonite due to adsorption (or precipitation) of silica on their surfaces, along with temperature-dependent variations of silica condensation rates. Data collected at high silica concentrations indicate the presence of an amorphous phase over extended frames of time, suggesting that initially generated ACC particles are progressively stabilised by silica. Our results may have important implications for CaCO3 precipitation scenarios in both geochemical and industrial settings, where solution silicate is omnipresent, as well as for CO2 sequestration technologies.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
540 Chemie
Schlagwörter
Konferenz
Rezension
undefined / . - undefined, undefined
Zitieren
ISO 690KELLERMEIER, Matthias, Fabian GLAAB, Regina KLEIN, Emilio MELERO-GARCÍA, Werner KUNZ, Juan Manuel GARCÍA-RUIZ, 2013. The effect of silica on polymorphic precipitation of calcium carbonate : an on-line energy-dispersive X-ray diffraction (EDXRD) study. In: Nanoscale. 2013, 5(15), pp. 7054-7065. ISSN 2040-3364. eISSN 2040-3372. Available under: doi: 10.1039/c3nr00301a
BibTex
@article{Kellermeier2013-08-07effec-42078,
  year={2013},
  doi={10.1039/c3nr00301a},
  title={The effect of silica on polymorphic precipitation of calcium carbonate : an on-line energy-dispersive X-ray diffraction (EDXRD) study},
  number={15},
  volume={5},
  issn={2040-3364},
  journal={Nanoscale},
  pages={7054--7065},
  author={Kellermeier, Matthias and Glaab, Fabian and Klein, Regina and Melero-García, Emilio and Kunz, Werner and García-Ruiz, Juan Manuel}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/42078">
    <dc:creator>Klein, Regina</dc:creator>
    <dc:language>eng</dc:language>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/29"/>
    <dcterms:abstract xml:lang="eng">Calcium carbonate is the most abundant biomineral and a compound of great industrial importance. Its precipitation from solution has been studied extensively and was often shown to proceed via distinct intermediate phases, which undergo sequential transformations before eventually yielding the stable crystalline polymorph, calcite. In the present work, we have investigated the crystallisation of calcium carbonate in a time-resolved and non-invasive manner by means of energy-dispersive X-ray diffraction (EDXRD) using synchrotron radiation. In particular, the role of silica as a soluble additive during the crystallisation process was examined. Measurements were carried out at different temperatures (20, 50 and 80 °C) and various silica concentrations. Experiments conducted in the absence of silica reflect the continuous conversion of kinetically formed metastable polymorphs (vaterite and aragonite) to calcite and allow for quantifying the progress of transformation. Addition of silica induced remarkable changes in the temporal evolution of polymorphic fractions existing in the system. Essentially, the formation of calcite was found to be accelerated at 20 °C, whereas marked retardation or complete inhibition of phase transitions was observed at higher temperatures. These findings are explained in terms of a competition between the promotional effect of silica on calcite growth rates and kinetic stabilisation of vaterite and aragonite due to adsorption (or precipitation) of silica on their surfaces, along with temperature-dependent variations of silica condensation rates. Data collected at high silica concentrations indicate the presence of an amorphous phase over extended frames of time, suggesting that initially generated ACC particles are progressively stabilised by silica. Our results may have important implications for CaCO&lt;sub&gt;3&lt;/sub&gt; precipitation scenarios in both geochemical and industrial settings, where solution silicate is omnipresent, as well as for CO&lt;sub&gt;2&lt;/sub&gt; sequestration technologies.</dcterms:abstract>
    <dc:contributor>García-Ruiz, Juan Manuel</dc:contributor>
    <dc:creator>Glaab, Fabian</dc:creator>
    <dc:contributor>Melero-García, Emilio</dc:contributor>
    <dc:contributor>Klein, Regina</dc:contributor>
    <dc:creator>Melero-García, Emilio</dc:creator>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/29"/>
    <dc:contributor>Kellermeier, Matthias</dc:contributor>
    <dc:contributor>Kunz, Werner</dc:contributor>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/42078"/>
    <dc:creator>Kellermeier, Matthias</dc:creator>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:contributor>Glaab, Fabian</dc:contributor>
    <dcterms:issued>2013-08-07</dcterms:issued>
    <dcterms:title>The effect of silica on polymorphic precipitation of calcium carbonate : an on-line energy-dispersive X-ray diffraction (EDXRD) study</dcterms:title>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-04-18T09:19:58Z</dc:date>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-04-18T09:19:58Z</dcterms:available>
    <dc:creator>García-Ruiz, Juan Manuel</dc:creator>
    <dc:creator>Kunz, Werner</dc:creator>
  </rdf:Description>
</rdf:RDF>
Interner Vermerk
xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter
Kontakt
URL der Originalveröffentl.
Prüfdatum der URL
Prüfungsdatum der Dissertation
Finanzierungsart
Kommentar zur Publikation
Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Ja
Begutachtet
Diese Publikation teilen