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  • Geophysics  (2)
  • red mud leachability  (2)
  • 1
    Electronic Resource
    Electronic Resource
    LEACHABILITY AND IMMOBILISATION OF BERYLLIUM FROM SOLID WASTE (RED-MUD) GENERATED IN PROCESSING BERYL (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 297-306 
    Details
    ISSN: 1573-2932
    Keywords: Beryllium ; solid waste ; red mud leachability ; immobilisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In view of the toxic nature of Beryllium and its compounds the disposal of waste materials containing beryllium needs prior evaluation. The present study was undertaken to obtain information on the leachability and immobilisation of beryllium from solid waste red-mud generated in processing Beryl at the Beryllium Metal Plant at Vashi, New Bombay. The studies showed that 62% of the total beryllium in red-mud can be extracted by water by repeated leaching over a period of 445 d. The mixing of the waste material with cement and casting into cement blocks reduced the leachability of beryllium to 0.11% which got further reduced to 0.02% by thermal curing of cement blocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026451403076
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Leachability and immobilisation of beryllium from solid waste (red-mud) generated in processing Beryl (1997)
    Springer
    Water, air & soil pollution 94 (1997), S. 297-306 
    Details
    ISSN: 1573-2932
    Keywords: Beryllium ; solid waste ; red mud leachability ; immobilisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In view of the toxic nature of Beryllium and its compounds the disposal of waste materials containing beryllium needs prior evaluation. The present study was undertaken to obtain information on the leachability and immobilisation of beryllium from solid waste red-mud generated in processing Beryl at the Beryllium Metal Plant at Vashi, New Bombay. The studies showed that 62% of the total beryllium in red-mud can be extracted by water by repeated leaching over a period of 445 d. The mixing of the waste material with cement and casting into cement blocks reduced the leachability of beryllium to 0.11 % which got further reduced to 0.02% by thermal curing of cement blocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02406065
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Discovery of Intense Gamma-Ray Flashes of Atmospheric Origin (1994)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Detectors aboard the Compton Gamma Ray Observatory have observed an unexplained terrestrial phenomenon: brief, intense flashes of gamma rays. These flashes must originate in the atmosphere at altitudes above at least 30 kilometers in order to escape atmospheric absorption and reach the orbiting detectors. At least a dozen such events have been detected over the past 2 years. The photon spectra from the events are very hard (peaking in the high-energy portion of the spectrum) and are consistent with bremsstrahlung emission from energetic (million-electron volt) electrons. The most likely origin of these high- energy electrons, although speculative at this time, is a rare type of high-altitude electrical discharge above thunderstorm regions.
    Keywords: Geophysics
    Type: NASA-TM-112018 , NAS 1.15:112018 , Science; 264; 1313-1316
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A Catalog of Terrestrial Gamma-Ray Flashes Observed with the Fermi- Gamma-Ray Burst Monitor: The First Sixteen Months of Operation (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: The Gamma-ray Burst Monitor (GBM) on the Fermi Gamma-ray Space Telescope Observatory (Fermi) has been detecting on the average about one terrestrial gamma-ray flash every four weeks. This catalog presents the basic characteristics of observed TGFs from the beginning of the Fermi-GBM operation in 2008 July until 2009 October. The thick bismuth germanate (BGO) scintillation detectors of the GBM system have observed photon energies from TGFs at energies above 30 MeV. It is found that the TGF pulses are typically shorter than previously reported, and in several cases less than 0.2ms. Extremely high counting rates are encountered ~200kcps or higher per detector during portions of some TGFs. These high rates require considerable corrections (with inherent assumptions) to the observed data in order to derive the true counting rates.
    Keywords: Geophysics
    Type: M10-0121 , 2009 American Geophysical Union (AGU) 2009 Fall Meeting; Dec 14, 2009 - Dec 18, 2009; San Francisco, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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