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  • Erzlagerstätte
  • Geochemie
  • Stratigraphie
  • Sofija : Balgarska Akademija na Naukite (BAN)  (4)
  • KIT Scientific Publishing  (2)
  • Moskva : Nauka  (1)
  • Potsdam : Zentralinstitut Physik der Erde
Collection
Keywords
Publisher
Language
Years
  • 1
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    Assessment of an ultramicroelectrode array (UMEA) sensor for the determination of trace concentrations of heavy metals in water [online] (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-04
    Description: The main objectives of this book are (i) to investigate the electrochemical behavior and the analytical performance of a novel ultramicroelectrode array (UMEA); (ii) to assess the analytical parameters of square-wave anodic stripping voltammetric measurements (SWASV) using the UMEA; and (iii) to estimate the potential of the UMEA in developing decentralised analytical equipments for the determination of trace concentrations of heavy metals in natural waters. Surface analytical techniques (SEM, ESEM, and AFM) showed that the UMEA chips are of high quality in manufacture. Cyclic voltammetric and chronoamperometric experiments proved that the electrochemical behavior of the UMEA is dominated by the features characteristic for single microelectrodes.Chronocoulometry was found to be the most suitable method in generating the Hg-film of good quality. A new UMEA chip could be plated at least ten times, corresponding to about 500 measurements of trace metals in synthetic aqueous solutions. Using SWASV, detection limits of 〈0.1 ï¿g/l could be achieved for the metals (Pb, Cd). Precision and accuracy were found to be approx +/-10% of RSD.In natural waters, the results obtained with the UMEA sensor showed a reasonably good agreement with HR-ICP-MS analyses. Different experimental parameters were optimised and investigated. Interferences (e.g., DOC) were significantly reduced through medium exchange and standard addition. Ultrasonic bath proved to be very efficient in resurfacing electrodes in laboratory.The UMEA sensor shows a great potential in developing a portable trace metal analyzer. However, for in situ and on-site measurements, the protection of the UMEA sensor from fouling seems to be inevitable. In order to achieve a pure microelectrode behavior with the UMEA, increasing the ratio of interelectrode distance to electrode diameter is recommended for further developments.
    Keywords: QC1-999 ; Schwermetall ; Geochemie ; Chemischer Sensor ; Elektrochemischer Sensor ; Mikroelektrode ; Sensor ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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  • 2
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    Geochemisch-mineralogische Hochwassersignale in Auensedimenten und deren Relevanz für die Rekonstruktion von Hochwasserereignissen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-04
    Description: Die vorliegende Arbeit untersucht die Möglichkeit der Rekonstruktion prähistorischer Hochwasserereignisse am Oberrhein und an der Oberen Donau anhand von Änderungen in der geochemisch-mineralogischen sowie der granulometrischen Zusammensetzung von Auensedimenten. Das konkrete Ziel der Arbeit ist es, einen Zusammenhang zwischen der geochemisch-mineralogischen sowie der granulometrischen Zusammensetzung der im Auenbereich abgelagerten Sedimente und der Höhe des herrschenden Abflusses nachzuweisen.
    Keywords: QC1-999 ; Rhein ; Geochemie ; Donau ; Granulometrie ; Hochwasserrekonstruktion ; bic Book Industry Communication::P Mathematics & science::PH Physics ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: German
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  • 3
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    Izvestija na Geologiceskija Institut / Serija Stratigrafija i Litologija
    Sofija : Balgarska Akademija na Naukite (BAN)
    Print: 18.1969 – 23.1974 (Location: A17, Keller, 29/2)
    Details
    Formerly as: Izvestija na Geologiceskija Institut / Serija Geotektonika, Stratigrafija i Litologija  (1967–1968)
    Continued as: Paleontologija, Stratigrafija i Litologija = Palaeontology, Stratigraphy and Lithology  (1975–)
    Publisher: Sofija : Balgarska Akademija na Naukite (BAN)
    Corporation: Geologiceski Institut 〈Sofia〉
    Topics: Geosciences
    Keywords: Stratigraphie ; Lithologie ; Bulgarien
    Parallel titles: Bulletin of the Geological Institute / Series Stratigraphy and Lithology
    Abbreviation: Izv Geol Inst Ser Stratigr Litol
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  • 4
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    Izvestija na Geologiceskija Institut / Serija Geochimija, Mineralogija i Petrografija
    Sofija : Balgarska Akademija na Naukite (BAN)
    Print: 16.1967 – 22.1973 (Location: A17, Keller, 29/2)
    Details
    Continued as: Geochimija, Mineralogija i Petrologija = Geochemistry, Mineralogy and Petrology  (1975–2005)
    Publisher: Sofija : Balgarska Akademija na Naukite (BAN)
    Corporation: Geologiceski Institut 〈Sofia〉
    Print ISSN: 0525-0722
    Topics: Geosciences
    Keywords: Geologie ; Mineralogie ; Gesteinskunde ; Geochemie ; Petrografie ; Petrographie ; Bulgarien
    Parallel titles: Bulletin of the Geological Institute / Series Geochemistry, Mineralogy and Petrography
    Abbreviation: Izv Geol Inst Ser Geochim Mineral Petrograf (Sofia)
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  • 5
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    Izvestija na Geologiceskija Institut / Serija Geotektonika
    Sofija : Balgarska Akademija na Naukite (BAN)
    Print: 18.1969 – 18.1969 (Location: A17, Keller, 29/2)
    Details
    Publisher: Sofija : Balgarska Akademija na Naukite (BAN)
    Corporation: Geologiceski Institut 〈Sofia〉
    Topics: Geosciences
    Keywords: Tektonik ; Stratigraphie ; Lithologie ; Bulgarien
    Parallel titles: Bulletin of the Geological Institute / Series Geotectonics
    Abbreviation: Izv Geol Inst Ser Geotekt (Sofia)
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  • 6
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    Izvestija na Geologiceskija Institut / Serija Rudni i Nerudni Polezni Izkopaemi
    Sofija : Balgarska Akademija na Naukite (BAN)
    Print: 18.1969 – 23.1974 (Location: A17, Keller, 29/2)
    Details
    Formerly as: Izvestija na Geologiceskija Institut Strasimir Dimitrov = Bulletin of the Strasimir Dimitrov Institute of Geology  (1960–1966)
    Continued as: Rudoobrazuvatelni Procesi i Mineralni Nachodista = Ore-forming Processes and Mineral Deposits  (1975–1991)
    Publisher: Sofija : Balgarska Akademija na Naukite (BAN)
    Corporation: Geologiceski Institut 〈Sofia〉
    Topics: Geosciences
    Keywords: Erzlagerstätte ; Nichtmetalllagerstätte ; Bulgarien
    Parallel titles: Bulletin of the Geological Institute / Series Metallic and Non-metallic Mineral Deposits
    Abbreviation: Izv Geol Inst Ser Rud Nerud Polez Izko (Sofia)
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  • 7
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    Geochimija
    Moskva : Nauka
    Print: 1967 – 2000 (Location: A18, 3/2)
    Details
    Publisher: Moskva : Nauka
    Corporation: Akademija Nauk SSSR 〈Moskva〉 , Rossijskaja Akademija Nauk 〈Moskva〉
    Print ISSN: 0016-7525
    Topics: Geosciences
    Keywords: Geochemie ; geochemistry ; Russland
    Parallel titles: Геохимия , Geokhimia , Geokhimiya
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    JOURNAL
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