Podrobnosti záznamu

Název
    200 Years of Pb Deposition throughout the Czech Republic: Patterns and Sources
Údaj o odpovědnosti
    Melanie A. Vile, R. Kelman Wieder, Martin Novák
Autor
    Novák, Martin, 1959-
    Vile, Melanie A.
    Wieder, R. Kelman
Jazyk
    anglicky
Zdrojový dokument - seriál
    Environmental science and technology
Svazek/č.
    Vol. 34, no. 1
Strany
    p. 12-21
Rok
    2000
Poznámky
    2 obr., 4 diagr., 3 tab.
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Environm. Sci. Technol.
Předmětová skupina
    historie
    izotopy Pb
    magnetická susceptibilita
    olovo
    prašný spad
    průmysl
    rašeliniště
    studie environmentálních vlivů
    uhelný revír
    znečištění
Geografické jméno
    Česká republika
Klíčové slovo
    200
    Czech
    Deposition
    Patterns
    Pb
    Republic
    Sources
    Throughout
    Years
Abstrakt (anglicky)
   Historical rates of Pb deposition were determined over the past 150-200 years for eight sites throughout the Czech Republic using 210Pb-dated, Sphagnum-derived peat cores. Maximum historical Pb deposition was greater at sites in the northern and western parts of the Czech republic than at sites in the southern part of the Czech Republic (peak values averaging 57, 21, and 16 mg m-2 yr-1, respectively). Lead deposition patterns generally reflect increasing industrialization over the past 100-200 years, especially in the post-World War II era. For seven of the eight sites, maximum Pb deposition occurred between 1965 and 1992, corresponding to a period of peak production and burning of lignite coal. A decrease in Pb deposition rates since 1975-1980 was evident in seven of the sites.
   The most recent Pb deposition rates (1992), estimated from the uppermost peat core sections, averaged 32, 11, and 7 mg m-1 yr-1 for the northern, western, and southern sites, respectively, are higher than current Pb deposition in the eastern United States of 4 mg m-2yr-1. Lead deposition rates prior to Czech Industrialization, estimated from th deepest dateable peat core sections, averaged 8, 5, and 1 mg m-2yr-1 for the northern, western, and southern sites, respectively. Using acid-insoluble ash concentrations in peat and peat magnetic susceptibility, determinations, we were able to identify past periods of elevated Pb deposition related to local mining of Pb-containing ore deposits at three of the sites and periods of elevated Pb deposition from fossil fuel combustion at five of the sites. Without stable Pb isotopic determinations, the importance of leaded gasoline-derived Pb could not be determined
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    28. 3. 2008
Datum importu
    8. 8. 2012