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  • 1
    Electronic Resource
    Electronic Resource
    Sediment accumulation rate in the lakes of Kumaun Himalaya, India using210Pb and226Ra (1994)
    Springer
    Environmental geology 23 (1994), S. 114-118 
    Details
    ISSN: 1432-0495
    Keywords: Sediment accumulation rate ; Lead-210 ; Radon-226 ; Nainital region ; Anthropogenic ; Kumaun Himalaya
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The rate of sedimentation and the source of sediments in the lake basins of Nainital region, Kumaun Himalaya, have been estimated employing210Pb and210Ra methods. This has yielded a rate of sedimentation of 11.5, 4.70, 3.72, and 3.00 mm/yr in Nainital, Bhimtal, Naukuchiyatal, and Sattal lakes, respectively. The higher rate of sedimentation in Nainital lake, compared to other lakes, is related to faster erosion in the catchment aided by greater anthropogenic activity, while the slowest rate in Sattal lake is due to less erosion and more input of soil-derived material involving a slow rate of accumulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00766984
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of cerium in marine sediments (1980)
    Springer
    Water, air & soil pollution 13 (1980), S. 133-141 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Marine sediments carry almost all the radioactive Ce that enters the ocean with the effluents released from the nuclear industry. The uptake of radioactive144Ce by the sedentary organisms is influenced by the amount of stable Cc present in the sediment. A method has been described for the determination of stable Cc in the sediments, based on ion exchange separation and colorimetric measurement with Arsenazo I reagent. The effect of diverse cations on the recovery of Cc is discussed. Lanthanum, Y, Th and Zr which form colored complexes with Arsenazo I, do not interfere under the conditions of the experiment. The recovery of stable Ce ranges from 95 to 98% Using the method, the stable Ce content in some sediments from coastal Bombay was observed to range from 20 to 99 ppm. The same method with minor changes is described for the determination of radioactive Ce in the sediments and illustrated with the analysis of a sediment sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02279541
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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