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Assessment of the BCR sequential extraction procedure for thallium fractionation using synthetic mineral mixtures

SYSNO ASEP	0436200
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Assessment of the BCR sequential extraction procedure for thallium fractionation using synthetic mineral mixtures
Tvůrce(i)	Vaněk, A. (CZ) Grygar, Tomáš (UACH-T) Chrastný, V. (CZ) Tejnecký, V. (CZ) Drahota, Petr (GLU-S)_{SAI, RID, ORCID} Komárek, M. (CZ)
Zdroj.dok.	Journal of Hazardous Materials. - : Elsevier - ISSN 0304-3894 Roč. 176, 1-3 (2010), s. 913-918
Poč.str.	6 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Metal ; Sequential extraction ; Goethite ; Ferrihydrite ; Birnessite ; Illite
Vědní obor RIV	DD - Geochemie
CEZ	AV0Z4032918 - UACH-T
	AV0Z30130516 - GLU-S (2005-2011)
UT WOS	000274839700125
EID SCOPUS	74449092629
DOI	10.1016/j.jhazmat.2009.11.123
Anotace	This work focused on the specific behavior of TI-bearing phases in the BCR (Community Bureau of Reference) sequential extraction (SE) scheme, namely TI-bearing ferrihydrite, goethite, birnessite, calcite, illite, sphalerite and feldspar in their simple model mixtures with quartz. Several significant discrepancies between the obtained and expected behaviors of these phases in the BCR SE were observed. The amount of TI released as the exchangeable/acid-extractable fraction (55-82% of the total TI content) showed a substantial W-promoted dissolution of all Fe(III) and Mn(III, IV) oxides (corresponding to up to 61% of solid Fe dissolved) and incongruent (increased) extraction of TI from ferrihydrite and goethite. Reductive conditions of the second SE step were insufficient to complete goethite dissolution with corresponding TI amount retained in the solid phase. Similarly, insufficient oxidation of sphalerite and lower TI recovery of the oxidisable fraction was identified. In contrast, the BCR SE seems to produce well predictable results of TI leaching from TI-bearing calcite and feldspar. Only 70% of total TI content was extracted from TI-modified illite in the exchangeable/acid-extractable step, while 30% was associated with the reducible and residual fractions, i.e., TI was strongly fixed to the illite matrix.
Pracoviště	Ústav anorganické chemie
Kontakt	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Rok sběru	2015

Počet záznamů: 1