Počet záznamů: 1

Transmission electron microscopy investigation of colloids and particles from landfill leachates

SYSNO ASEP	0380006
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Transmission electron microscopy investigation of colloids and particles from landfill leachates
Tvůrce(i)	Matura, M. (CZ) Ettler, V. (CZ) Klementová, Mariana (UACH-T)_{RID, SAI, ORCID}
Zdroj.dok.	Waste Management & Research - ISSN 0734-242X Roč. 30, č. 5 (2012), s. 530-541
Poč.str.	12 s.
Jazyk dok.	eng - angličtina
Země vyd.	GB - Velká Británie
Klíč. slova	colloids ; landfill leachates ; transmission electron microscopy ; calcite ; contaminant mobility
Vědní obor RIV	CA - Anorganická chemie
CEZ	AV0Z40320502 - UACH-T (2005-2011)
UT WOS	000304720000011
DOI	10.1177/0734242X11408382
Anotace	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 probably 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.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2013

Počet záznamů: 1