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  • Articles  (49)
  • 2010-2014  (37)
  • 1960-1964  (3)
  • 1935-1939  (9)
  • Geosciences  (36)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (13)
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  • Articles  (49)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 76 (1936), S. 193-200 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung 1. Sorgfältig ausgewaschene Niederschläge von Eisen-, Aluminium-, Chrom- und Zer-Hydroxyd und ebenso von Kalzium-, Strontium- und Barium-Karbonat können durch Elektrolyte unter Bildung emulsoider Sole peptisiert werden. 2. Bei langsamer Koagulation dieser Sole bilden sich schmale, verschiedenfarbige Ringe.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 82 (1938), S. 79-87 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Anorganische Salze: Cu-, Al-, Fe-, Cr-, Ni-, Co-, Ca-, Ba- und Mg-Phosphat; Pb- und Ba-Chromat; Al-, Ca- und Mg-Silikat; Ca- und Ba-Borat; Al- und Cr-Hydroxyd; Cr- und Fe-Azetat; Mg-Karbonat; Ca-Oxalat und Fe-Zitrat wurden durch Dekantieren mit kaltem Wasser einige Tage gewaschen und mit Elektrolytlösungen peptisiert. Die so erhaltenen Mischungen wurden über Nacht stehen gelassen, und die überstehende Flüssigkeit, die den Überschuß des peptisierenden Elektrolyten enthält, abpipettiert. Dann wurden die gebildeten Kolloide mit den Außenelektrolyten überschichtet. Die peptisierenden und die koagulierenden Elektrolyte seien paarweise genannt: a) Reagierende Elektrolyte: KJ-HgCl2; KBr-HgCl2; KJ-AgNO3; KBr-AgNO3; K2Cr2O7-AgNO3; KJ-Pb(NO3)2; KJ-CuSO4; BaCl2-CuSO4; BaCl2-K2Cr2O7; BaCl2-K2SO4; BaCl2-AgNO3. b) Nichtreagierende Elektrolyte: BaCl2-HgCl2; K2SO4-CuSO4; KJ-K2Cr2O7; KBrK2SO4; Pb(NO3)2-AgNO3. c) Der gleiche Elektrolyt: BaCl2-BaCl2; KJ-KJ; AgNO3-AgNO3; KBr-KBr; CuSO4-CuSO4. 2. Die Niederschläge, deren Herstellung oben geschildert wurde, wurden mit Ferrihydroxydsol peptisiert und mit CuSO4, AgNO3, BaCl2 usw. koaguliert. 3. Mit kaltem Wasser gut gewaschenes Cr(OH)3 wurde mit KBr-Lösungen peptisiert. Die Mischungen wurden im Papierfilter im Trichter so lange gewaschen, bis im Waschwasser keine Br-Ionen nachweisbar waren. Bei Überschichtung mitAußenelektrolyten Bildung ausgeprägterRinge. 4. Eine Theorie wird gegeben, die die Ringbildung in allen genannten Fällen erklärt. 5. Die besten Ringe wurden bei Anwendung von peptisierten Al- und Ca-Phosphaten, Ba- und Ca-Boraten, Al- und Mg-Silikaten, Al- und Cr-Hydroxyden erhalten.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 76 (1936), S. 330-333 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Es wurden die gut ausgewaschenen Niederschläge von Al-, Cr-, Ca-, Mg-Hydroxyd und -Karbonat durch Elektrolyte peptisiert, die bei der Berührung mit dem Koagulator keine unlöslichen Niederschläge bilden. Die Ringbildung in weiten Reaktionsräumen läßt sich nur dadurch erklären, daß man die Entstehung geschichteter Niederschläge auf eine periodische Koagulation zurückführt.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 82 (1938), S. 203-207 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung 1. Periodische Niederschläge entstehen bei der langsamen Hinzufügung von Elektrolytlösungen zu einem Sol, wenn die Konzentration des flockenden Elektrolyten nahe dem Koagulationswert des betreffenden Sols liegt, aber ihn nicht überschreitet. 2. Periodische Niederschläge oder Bandstrukturen sind ein Zwischenstadium, das durch-schritten werden muß, bevor ein Kolloid vollständig flockt. 3. Eine Theorie wird gegeben, welche die Bildung von Bandstrukturen durch die Koagulation verdünnter Kolloide in Abwesenheit eines Fremdmediums erklärt.
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  • 5
    Publication Date: 2011-03-01
    Description: Retreat of the East Antarctic ice sheet during the last glacial termination Nature Geoscience 4, 195 (2011). doi:10.1038/ngeo1061 Authors: Andrew Mackintosh, Nicholas Golledge, Eugene Domack, Robert Dunbar, Amy Leventer, Duanne White, David Pollard, Robert DeConto, David Fink, Dan Zwartz, Damian Gore & Caroline Lavoie
    Print ISSN: 1752-0894
    Electronic ISSN: 1752-0908
    Topics: Geosciences
    Published by Springer Nature
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  • 6
    Publication Date: 2011-01-01
    Description: Glacial sediments from the Prince Charles Mountains, East Antarctica, record late Pleistocene ice thickness variability in the Lambert Glacier-Amery Ice Shelf system, one of the world's largest ice drainages. A former glacial limit, demarcated by minimally weathered deposits, follows a concave longitudinal profile, indicating a zone of strong ice streaming through the northernmost 500 km of the Lambert Graben. In situ 10Be and 26Al exposure ages from these relatively unweathered deposits indicate that the most recent phase of ice lowering occurred between ca. 18 and 8 ka, preceding by as many as 6 k.y. the deglaciation of adjacent coastal regions. Earlier onset of deglaciation in an area of strong ice streaming suggests a heightened sensitivity of the East Antarctic Ice Sheet to climate and sea-level changes following the Last Glacial Maximum than previously recognized.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
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  • 7
    Publication Date: 1937-01-01
    Print ISSN: 0016-7878
    Topics: Geosciences
    Published by Elsevier
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  • 8
    Publication Date: 2014-04-15
    Description: Shales are increasingly being exploited for oil and unconventional gas. Exploitation of sub-arctic oil shales requires the creation of gravel pads to elevate workings above the heaving effects of ground ice. These gravel pads can potentially generate acidic leachate, which can enhance the mobility of metals from the shale. To examine this potential, pyrite-bearing shale originating from sub-Arctic gravel pad sites were subjected to leaching tests for 600 days at initial pH values ranging from 2 to 5, to simulate potential real world conditions. At set times over the 600 day experiment, pH, oxidation reduction potential (ORP), dissolved oxygen and temperature were recorded and small liquid samples withdrawn and analysed for elemental concentrations using total reflection X-ray fluorescence spectrometry (TRXRF). Six of eight shale samples were found to be acid generating, with pH declining and ORP becoming increasingly positive after 100 days. Two of the eight shale samples produced increasingly alkaline leachate conditions with relatively low ORP after 100 days, indicating an inbuilt buffering capacity. By 600 days the buffering capacity of all samples had been consumed and all leachate samples were acidic. TRXRF analyses demonstrated significant potential for the leaching of S, Fe, Ni, Cu, Zn and Mn with greatest concentrations found in reaction vessels with most acidic pH and highest ORP.
    Electronic ISSN: 2075-163X
    Topics: Geosciences
    Published by MDPI Publishing
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  • 9
    Publication Date: 2014-01-01
    Description: Effective management of contaminated land requires a sound understanding of site geology, chemistry and biology. This is particularly the case for Antarctica and the Arctic, which function using different legislative frame- works to those of industrialized, temperate environments and are logistically challenging environments to operate in. This paper reviews seven remediation technologies currently used, or demonstrating potential for on-site or in situ use at metal-contaminated sites in polar environments, namely permeable reactive barriers (PRB), chemical fixation, bioremediation, phytoremediation, electrokinetic separation, land capping, and pump and treat systems. The technologies reviewed are discussed in terms of their advantages, limitations and overall potential for the management of metal-contaminated sites in Antarctica and the Arctic. This review demonstrates that several of the reviewed technologies show potential for on-site or in situ usage in Antarctica and the Arctic. Of the reviewed technologies, chemical fixation and PRB are particularly promising technologies for metal-contaminated sites in polar environments. However, further research and relevant field trials are required before these technologies can be considered proven techniques. Keywords: Polar; heavy metals; remediation; contaminants; in situ (Published: 31 December 2013) Citation: Polar Research 2014, 33 , 21522, http://dx.doi.org/10.3402/polar.v33.21522
    Print ISSN: 0800-0395
    Electronic ISSN: 1751-8369
    Topics: Geography , Geosciences
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  • 10
    Publication Date: 2014-02-01
    Print ISSN: 0167-577X
    Electronic ISSN: 1873-4979
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Elsevier
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