Podrobnosti záznamu

Název
    Transmission electron microscopy investigation of colloids and particles from landfill leachates
Autor
    Ettler, Vojtěch
    Klementová, Mariana
    Matura, Marek
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Waste Management and Research
Svazek/č.
    Roč. 30, č. 5
Strany
    12
Rok
    2012
Výraz tezauru
    calcite
    colloids
    contaminant mobility
    landfill leachates
    transmission electron microscopy
Klíčové slovo
    Colloids
    Electron
    Investigation
    Landfill
    Leachates
    Microscopy
    Particles
    Transmission
Abstrakt (anglicky)
   Leachates collected at two (active and closed) municipal solid waste (MSW) landfills were examined for colloids and particles by transmission electron microscopy, energy dispersive spectrometry, selected area electron diffraction and for the chemical compositions of the filtrates after the filtration to 0.1 mu m and ultrafiltration to 1 kDa (similar to 1 nm). Six groups of colloids/particles in the range 5 nm to 5 mm were determined (in decreasing order of abundance): carbonates, phyllosilicates (clay minerals and micas), quartz, Fe-oxides, organics and others (salts, phosphates). Inorganic colloids/particles in leachates from the active landfill predominantly consist of calcite (CaCO3) and minor clay minerals and quartz (SiO2). The colloids/particles in the leachates from the closed landfill consist of all the observed groups with dominant phyllosilicates. Whereas calcite, Fe-oxides and phosphates can precipitate directly from the leachates, phyllosilicates and quartz are more probabl
   y either derived from the waste or formed by erosion of the geological environment of the landfill. Low amounts of organic colloids/particles were observed, indicating the predominance of organic molecules in the 'truly dissolved' fraction (fulvic compounds). Especially newly formed calcite colloids forming particles of 500 nm and stacking in larger aggregates can bind trace inorganic contaminants (metals/metalloids) and immobilize them in landfill environments.
Přispěvatel
    UK Praha, Přírodovědecká fakulta
Kód přispěvatele
    UK, PřF
Zdrojový formát
    R
Datum importu
    27. 4. 2014