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  • 1
    Electronic Resource
    Electronic Resource
    Austauschvorgänge von Spurenelementen an Schwebstoffen (1981)
    Springer
    Naturwissenschaften 68 (1981), S. 264-265 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01047330
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical speciation of heavy metals in soils by use of XAFS spectroscopy and electron microscopical techniques (1999)
    Springer
    Fresenius' journal of analytical chemistry 364 (1999), S. 238-244 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Pb-contaminated soil samples were investigated using XAFS spectroscopy and SEM/EDX as tools for the analysis of chemical binding forms. The soils originated from the vicinity of a battery factory in Hannover (Germany) and had Pb-contents between 50 g/kg and 140 g/kg. PbCO3, PbSO4, PbO and basic PbCO3 could be identified as the main constituents in the samples by XAFS spectroscopy (EXAFS as well as XANES). This result is consistent with the results of the SEM/EDX investigations on the same soil samples, which showed, that almost all of the lead contained in the soils appears in the form of discrete particles of lead compounds. The EDX analysis of these particles consistently shows the presence of Pb, C, O and S.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160051330
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical mobility and bioavailabity of sediment-bound heavy metals influenced by salinity (1992)
    Springer
    Hydrobiologia 235-236 (1992), S. 605-610 
    Details
    ISSN: 1573-5117
    Keywords: heavy metals ; sediments ; bioavailability ; transfer processes ; mobilization ; salinity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The transfer of metals from contaminated sediments to algal cell walls (Scenedesmus quadricauda) and organisms from various trophic levels (euryhaline osmoconform hydroid Cordylophora caspia and algae Brachiomonas submarina) was studied with a multichamber device. The system consists of a central chamber which contained the mud suspension and six external chambers containing the different biological indicators. The solids in the central and external chambers are separated by 0.45 μm-diameter membranes which allow diffusion of the mobilized, dissolved metal compounds. Experiments were performed with dredged sediments at various salinities (0.5, 1.0, 1.5, and 2.0 percent, respectively) and the kinetic of re-adsorption was obtained by taking samples after different time intervals. High enrichment of Cd was found in the living alga Brachiomonas submarina, but on the other side only a weak influence of salinity on re-adsorption could be observed. Model experiments with ionic Cd showed a clear dependency on Cd-sorption on the algae, Cd-concentration in solution, and salinity. These results indicate that the transfer of metals mainly depends on the specific surface properties of the substrates and on the specific chemical form of the dissolved mobilized metal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00026248
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Assessment of long-term metal mobility in heat-processing wastes (1991)
    Springer
    Water, air & soil pollution 57-58 (1991), S. 319-328 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Estimation of long-term release of metals from solids can be made using a test procedure, which combines data from column experiments applying controlled intensification of parameters such as pH-value, redox potential and temperature with results from sequential extraction of the contaminated solids before and after exposure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00282895
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Direktbestimmung von Cd, Cu und Ni im Elbeästuar mit Hilfe der Zeeman-Atomabsorptionsspektroskopie und Matrixmodifikation (1986)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 323 (1986), S. 865-868 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es werden Verfahren zur Direktbestimmung von Cd, Cu und Ni im Elbeästuar vorgestellt, die auf Zeeman-Untergrundkorrektur und Matrixmodifikation beruhen. Die Untersuchungen zeigten gute Ergebnisse für Konzentrationen im μg/l-Bereich. Ni konnte ohne Matrixmodifikation in Meerwasser nicht nachgewiesen werden. Die Vorteile der Direktbestimmung liegen in brauchbaren Nachweisgrenzen, hoher Präzision und kurzen Analysezeiten. Die Nachweisgrenzen betrugen 0.1 μg/l für Cd und 1 μg/l für Cu sowie Ni.
    Notes: Summary Procedures for the direct determination of Cd, Cu and Ni concentrations in the Elbe River estuary are presented which base on Zeeman-background correcture and matrix modification. Investigations showed good results with concentrations in the μg/l-range. Detection of Ni in seawater was impossible without matrix modification. The advantages of direct determination are useful detection limits, high precision and short time in analysis. The detection limits were 0.1 μg/l for Cd, and 1 μg/l for Cu and Ni.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00475771
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchung der Austauschvorgänge von Spurenelementen an Schwebstoffen mit Hilfe der Radionuklidtechnik (1981)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 307 (1981), S. 356-361 
    Details
    ISSN: 1618-2650
    Keywords: Austausch von Elementspuren an Schwebstoffen ; Untersuchung mit Radionukliden
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Das Verhalten der Elemente As, Ba, Cd, Ce, Co, Cr, Cs, Fe, Na und Zn wurde mit Hilfe von Radionukliden untersucht. In Schüttelexperimenten wurde die Sorption der Nuklide an den Schwebstoffen als Funktion der Zeit bis zur Gleichgewichtseinstellung verfolgt, und die Verteilungskoeffizienten zwischen Schwebstoff und Lösung wurden bestimmt. Außerdem wurde die Remobilisierung der Spurenelemente unter dem Einfluß einer erhöhten Natriumchloridkonzentration gemessen.
    Notes: Summary The behaviour of the trace elements As, Ba, Cd, Ce, Co, Cr, Cs, Fe, Na and Zn was investigated by means of radionuclides. While shaking sorption of the nuclides on suspended matter was measured as a function of time until equilibrium was reached, and the distribution coefficients between suspended matter and solution were determined. Furthermore, the remobilisation of the trace elements under the influence of high sodium chloride concentration was measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00480112
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  • 7
    Electronic Resource
    Electronic Resource
    Separation of trace elements from natural water and waste water (1980)
    Springer
    Microchimica acta 74 (1980), S. 445-454 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Methoden der Unterscheidung verschiedener chemischer Formen der Spurenelemente in natürlichen Wässern und ihre Trennung werden diskutiert und für Rheinwasser angewendet. Folgende Ergebnisse von Spurenelement-Trennungen werden beschrieben: Abtrennung aus Meerwasser durch Adsorption an Aktivkohle in Gegenwart von Komplexbildnern, Abtrennung aus Mineralwässern unter Verwendung des chelatbildenden Zelluloseaustauschers Hyphan, Abtrennung der Actinidenelemente MIV durch Mitfällung mit Bariumsulfat, Mitfällung mit Eisenhydroxid und Eisenphosphat aus Abwasser.
    Notes: Summary Methods of discrimination between different chemical forms of trace elements in natural waters and for their separation are discussed and results given for their application to Rhine water. Various methods of trace element separation are presented: separation from sea-water by adsorption on activated carbon in presence of complexing agents, separation from mineral waters by use of the chelating cellulose exchanger Hyphan, separation of actinide elements by co-precipitation with barium sulphate, co-precipitation from waste water with hydrous ferric oxide and with ferric phosphate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197612
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    Paper (German National Licenses)
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