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  • 1
    Keywords: Environmental sciences -- Measurement. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (342 pages)
    Edition: 1st ed.
    ISBN: 9783540712732
    DDC: 542
    Language: English
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  • 2
    Keywords: Analytical biochemistry ; Geochemistry ; Hydraulic engineering ; Waste disposal ; Environmental toxicology ; Chemistry ; Hydrogeologie ; Messtechnik ; Qualitätssicherung ; Messunsicherheit ; Geochemie ; Messtechnik ; Qualitätssicherung ; Messunsicherheit ; Radioaktiver Abfall ; Abfallbeseitigung ; Umweltüberwachung
    Description / Table of Contents: Metrological concepts like traceability or measurement uncertainty form important parts of international treaties and normative documents. Their applications e.g. in chemical or food analysis or in environmental monitoring are entering our daily life. The development of those concepts has been driven by demand on a world-wide scale from trade, industry and the legal systems. In the future, no chemist, geochemist, chemical , civil or environmental engineer and no other specialist dealing with chemical measurement data, and no decision maker, neither in trade and industry, in public or medical services, in the political and diplomatic arenas or in academic research can afford not to become acquainted with metrology, its concepts and impact. This book provides a basic overview over the relevant metrological concepts like traceability, ISO uncertainties or cause-and-effect diagrams. The applications described in great detail range from progression-of-error type evaluation of the measurement uncertainty budget to complex applications like pH measurement or speciation calculations for aqueous solutions. The consequences of a measurement uncertainty concept for chemical data are outlined for geochemical modeling applied to transport in the subsurface and to nuclear waste disposal. Special sections deal with the deficits of existing thermodynamic data for these applications and with the current position of chemical metrology in respect to other quality assurance measures, e.g. ISO 900x, GLP, European and U.S.-American standards. The CD-ROM accompanying the book provides two illustrative programmes (for IBM PCs and derivatives, with manuals and example data sets) and important official documents and guides in PDF format.
    Type of Medium: Online Resource
    Pages: Online-Ressource , Ill., graph. Darst.
    Edition: Online-Ausg. 2007 Springer eBook Collection. Chemistry and Materials Science
    ISBN: 9783540712732
    DDC: 542.3
    RVK:
    RVK:
    Language: English
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 135 (2000), S. 155-168 
    ISSN: 1436-5073
    Keywords: Key words: Chemical thermodynamics; environmental prognosis; pH electrode calibration; statistical analysis; uranium solubility.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract.  A statistical analysis of multi-point calibration procedure for practical measurement of pH under laboratory conditions is given. The procedure is shown to provide the necessary elements for simple assignment of an uncertainty to a pH measurement – an essential element of quality control. Performance of ordinary least squares regression for prediction of confidence limits is compared to orthogonal regression, inverse regression and Monte Carlo simulations. In case of pH measurement by multi-point calibration procedure, methods considering uncertainties in both axes are found to be statistically more satisfactory than ordinary least squares regression. By analysis of 50 pH calibration data, randomly selected from 250 5-point glass electrode calibrations, it is found that the practical differences, however, are of minor importance. The significance of uncertainty in pH is demonstrated for an example from metal ion speciation in aqueous solution.
    Type of Medium: Electronic Resource
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  • 4
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    Institut für Geologie 〈Freiberg〉
    Publication Date: 2021-03-29
    Description: Deutsche Forschungsgemeinschaft
    Description: research
    Keywords: 551.4 ; VJC 000 ; VQ 600 ; VJF 000 ; Aquatische Geochemie ; Grenzgebiete. Beziehungen. Einflüsse. Wirkungen. {Lagerstättenkunde} ; Umweltgeochemie insgesamt ; uranium ; geochemistry ; hydrochemistry ; hydrogeochemistry ; physicochemical properties ; isotope fractionation ; isotope fractionation ; spectroscopy
    Language: English
    Type: article , publishedVersion
    Format: application/pdf
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  • 5
    Publication Date: 2021-03-29
    Description: Zerovalent iron (ZVI) has been proposed as a reactive material in permeable in situ walls for groundwater contaminated by metal pollutants. For such pollutants that interact with corrosion products, the determination of the actual mechanism of their removal is very important to predict their stability in the long term. From a study of the effects of pyrite (FeS2) and manganese nodules (MnO2) on the uranium removal potential of a selected ZVI material, a test methodology (FeS2MnO2 method) is suggested to follow the pathway of contaminant removal by ZVI materials. An interpretation of the removal potential of ZVI for uranium in the presence of both additives corroborates coprecipitation with iron corrosion products as the initial removal mechanism for uranium.
    Description: Keywords: iron, redox reactions, uranium, water treatment
    Description: research
    Keywords: 551.9 ; VJF 000 ; Umweltgeochemie insgesamt
    Language: English
    Type: article , publishedVersion
    Format: 22 S.
    Format: application/pdf
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  • 6
    Publication Date: 2021-03-29
    Keywords: Uranyl(VI) hydrolysis; Time-resolved laser-induced fluorescence spectroscopy; Speciation; Relative fluorescence yield ; 551
    Language: English
    Type: article , submittedVersion
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  • 7
    Publication Date: 2021-03-29
    Description: Zerovalent iron (ZVI) has been proposed as reactive material in permeable in-situ walls for contaminated groundwater. An economically feasible ZVI reactive wall requires cheap but efficient iron materials. From an uranium treatability study and results of iron dissolution in 0.002 M EDTA by five selected ZVI materials, it is shown that current research and field implementation is not based on a rational selection of application-specific iron metal sources. An experimental procedure is proposed which could enable a better material characterization. This procedure consists in mixing ZVI materials and reactive additives including contaminant releasing materials (CRM) in long term batch experiments and characterise the contaminant concentration over the time.
    Keywords: contaminant; groundwater; in-situ remediation; zerovalent iron; uranium ; 551
    Language: English
    Type: article , submittedVersion
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  • 8
    Publication Date: 2021-03-29
    Description: Zerovalent iron (ZVI) has been proposed as a reactive material in permeable in-situ walls for groundwater contaminated by metal pollutants. For such pollutants which interact with corrosion products, the determination of the actual mechanism of their removal is very important to predict the long-term stability of reactive walls. From a study of the effects of pyrite (FeS2) and manganese nodules (MnO2) on the uranium removal potential of a selected ZVI material, a test methodology (FeS2-MnO2-method) is suggested to follow the pathway of contaminant removal by ZVI materials. An interpretation of the removal potential of ZVI for uranium in presence of both additives corroborates coprecipitation with iron corrosion products as a major removal mechanism for uranium.
    Keywords: contaminant; groundwater; in-situ remediation; zerovalent iron; uranium ; 551
    Language: English
    Type: article , submittedVersion
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  • 9
    Publication Date: 2021-03-29
    Description: Zerovalent iron (ZVI) has been proposed as reactive material in permeable in situ walls for contaminated groundwater. An economically feasible ZVI-based reactive wall requires cheap but efficient iron materials. From an uranium treatability study and results of iron dissolution in 0.002 M EDTA by five selected ZVI materials, it is shown that current research and field implementation is not based on a rational selection of application-specific iron metal sources. An experimental procedure is proposed which could enable a better material characterization. This procedure consists of mixing ZVI materials and reactive additives, including contaminant releasing materials (CRMs), in long-term batch experiments and characterizing the contaminant concentration over the time.
    Description: Keywords: iron, redox reactions, uranium water, treatment
    Description: research
    Keywords: 551.9 ; VJF 000 ; Umweltgeochemie insgesamt
    Language: English
    Type: article , publishedVersion
    Format: 17 S.
    Format: application/pdf
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