Podrobnosti záznamu

Název
    Role of organic solutes in the chemistry of acid-impacted bog waters of the western Czech Republic
Údaj o odpovědnosti
    Jakub Hruška, Chris E. Johnson, Pavel Krám
Autor
    Hruška, Jakub
    Johnson, Chris E.
    Krám, Pavel, 1960-
Jazyk
    anglicky
Zdrojový dokument - seriál
    Water resources research
Svazek/č.
    Vol. 32
Strany
    p. 2841-2851
Rok
    1996
Poznámky
    6 obr., 2 tab.
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Wat. Resour. Res. (Washington)
Předmětová skupina
    acidifikace
    atmosférická depozice
    disociace
    dusík
    hydrochemie
    kyselina organická
    kyselý déšť
    oxid siřičitý
    povodí
    rašeliniště
    rozpouštění
    uhlík organický
    vegetace
    voda povrchová
Geografické jméno
    Amerika severní
    ČR-Čechy
    Evropa severní
    Kladská (Cheb)
    Lysina (Cheb)
Klíčové slovo
    Acid-impacted
    Bog
    Chemistry
    Czech
    Organic
    Republic
    Role
    Solutes
    Waters
    Western
Abstrakt (anglicky)
   In many regions, naturally occurring organic acid anions can effectivelly buffer mineral acid inputs from atmospheric deposition, moderating their effect on surface water pH. We studied the effect of chronocally high inputs of acid rain on the chemistry of three brown-water streams in the western Czech Republic. The dissolved organic acids in the streams were similar in character to those of other systems in Europe and North America. The site densites (the carboxyl group content per mass of C) were similar to values reported from Fenno-Scandia, and the relationship between the apparent pKa and pH conformed to those from two North American studies. Sulfate and organic acid anions (OA-) were the dominant anions in all three streams, yet despite high dissolved organic carbon and total organic acid concentrations. OA- comprised only 21-32% of total anion charge.
   This pattern was due to very high sulfate concentrations and, in two of the streams, a low degree of dissociation of the organic acids, probably the results of high long-term inputs of strong acids. Stream water pH was highly correlated to sulfate concentration, but uncorrelated with OA-, suggesting that free acidity is controlled by strong mineral acids rather than organic acids. Thus future reductions in strong acid inputs should result in increased pH and a return to organic over acid-base chemistry
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    20. 8. 2007
Datum importu
    8. 8. 2012