Podrobnosti záznamu

Název
    Adsorption of copper and cadmium from aqueous solution by various types of sediments under static and dynamic conditions
Údaj o odpovědnosti
    Hana Müllerová, Ondřej Kruml, Karel Vybíhal, Josef Zeman, Pavel Müller
Autor
    Kruml, Ondřej
    Müller, Pavel
    Müllerová, Hana
    Vybíhal, Karel
    Zeman, Josef
Jazyk
    anglicky
Zdrojový dokument - seriál
    Bulletin of geosciences
Svazek/č.
    Vol. 78, no. 3
Strany
    p. 169-178
Rok
    2003
Poznámky
    3 obr., 7 tab., 5 pl., 8 bibl.
    il.
    Zkr. název ser.: Bull. Geosci.
Předmětová skupina
    adsorpce
    desorbce
    fázová rovnováha
    flyšové pásmo Západních Karpat
    izotermy
    kadmium
    karbonáty
    křemen
    měď
    mobilita
    nádrž vodní
    pískovce
    prvky hlavní
    půdy
    roztok vodný
    sedimentace recentní
    studie experimentální
    terciér
    znečištění
Geografické jméno
    ČR-Morava
    Horní Bečva (Vsetín)
    Lelekovice (Brno-venkov)
    Ždánice (Hodonín)
Klíčové slovo
    Adsorption
    Aqueous
    Cadmium
    Conditions
    Copper
    Dynamic
    Sediments
    Solution
    Static
    Types
    Various
Abstrakt (anglicky)
   The mobility of heavy metals in sediments and soils depends strongly on physical properties and chemical and mineralogical composition of such environments. Five types of samples with different amounts of carbonates, organic matter, chemical composition and various grain sizes were chosen. Experimental sorption data from batch tests were evaluated by Langmuir and Freundlich type isotherms, which provided main sorption characteristics of sediment samples for heavy metals (Cu, Cd). In order to simulate natural conditions more realistically, several leaching column tests were also performed. The sample sorption capacities under static and dynamic conditions were evaluated. All chosen samples bonded Cu more efficiently and firmly than Cd.
   Distilled water washed out about 6 per cent of Cu and 44 per cent of Cd from HBS 2 (quartz-dominated sample with 74 wt per cent of sand-sized fraction) and 6 per cent of Cu and 9 per cent of Cd from HBS 6 (finer-grained sample with some amount of organic matter and carbonates). Carbonates proved to be crucial for the mobility of heavy metals in natural samples. Free metals were washed out of pores at the very beginning of the desorption experiments. Then, weakly adsorbed metals (electric double layer) were washed out and finally, a low stationary metal concentration was established. Such behaviour should result in a slow release of small amounts of a heavy metal, which should therefore not represent significant danger to the environment
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    27. 9. 2007
Datum importu
    8. 8. 2012