Podrobnosti záznamu

Název
    Beryllium in Waters of Czech Forested Ecosystems and the Release of Beryllium from Granites
Údaj o odpovědnosti
    Tomáš Navrátil
Další názvy
    Environmental Geochemistry of Central Bohemian Forested Landscape with Granite Bedrock (Variant.)
Autor
    Navrátil, Tomáš
Jazyk
    anglicky
Zdrojový dokument - seriál
    Geolines
Svazek/č.
    Roč. 12
Strany
    s. 18-40
Rok
    2000
Poznámky
    23 obr., 17 tab.
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Geolines (Praha)
Předmětová skupina
    acidifikace
    berylium
    fluor
    granit
    hliník
    hydrochemie
    minerály horninotvorné
    povodí
    voda povrchová
Geografické jméno
    ČR-Čechy
    Kostelec nad Černými Lesy (Kolín)
    Lysina (Cheb)
    Šumava-Plešné jezero
    Volary (Prachatice)
Klíčové slovo
    Beryllium
    Czech
    Ecosystems
    Forested
    Granites
    Release
    Waters
Abstrakt (anglicky)
   he behaviour of beryllium (Be) in forest ecosystem waters was monitored during July-98 to June-99 at three sites in the Czech Republic (catchment Lesní Brook, Lysina and Plešné lake). Beryllium speciation was modeled using Mineql+version 3.01b software. Concentrations and speciation of Be are complex functions of abundance, pH and the concentrations of F, Al, DOC. The stream draining Lesní Brook has a wide pH range (4.6-6.9), high F concentration (average 0.7 mg/l) and elevated concentrations of Al and Be (<5 Šg/L). Speciation of the Be in the Lesní Brook water consists of two main complexes Be 2+, and BeF+, BeOh+, BeF2 and BeSO4 are minor. The sulphate complex never exceeds 1% of total Be concentration. BeOH and BeF2 can form over 80% of the total Be if pH5.7. The lysina brook has high DOC and Al concentrations, stable low pH values (3.9-4.2) and low F (-0.2 mg/l) and Be (-1 ug/l) concentrations. In the surface water of the Lysina catchment is quite different.
   The main species are BeF+ and Be2+, accounting for 90% of the Be. These changes are mainly caused by higher pH value (~5.3), higher F and Be, and lower Al concentrations Be in the Plešné lake waters is mainly ionic Be2+. Beryllium concentrations in the granites are higher than crustal average. The highest Be concentration (16.8 ppm) occurs in the Říčanský granite. The highest concentrations of Be were in the plagioclase (max. 43.1 ppm) and micas (max. 17.2 ppm). Lower Be concentration occurred in potassium feldspars (max. 6.3 ppm). Quartz contained the lowest Be concentrations (max. 1.7 ppm)
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    21. 3. 2008
Datum importu
    8. 8. 2012