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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12220%2F10%3A00010911" target="_blank" >RIV/60076658:12220/10:00010911 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41210/10:19288 RIV/00216208:11310/10:10080761 RIV/00025798:_____/10:00000472 RIV/60460709:41330/10:19288 a 3 dalších

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

This work focused on the specific behavior of Tl-bearing phases in the BCR sequential extraction (SE) scheme, namely Tl-bearing ferrihydrite, goethite, birnessite, calcite, illite, sphalerite and feldspar in their simple model mixtures with quartz. The amount of Tl released as the exchangeable/acid-extractable fraction (55?82% of the total Tl content) showed a substantial H+-promoted dissolution of all Fe(III) and Mn(III,IV) oxides (corresponding to up to 61% of solid Fe dissolved) and incongruent extraction of Tl from ferrihydrite and goethite. Reductive conditions of the second SE step were insufficient to complete goethite dissolution. Similarly, insufficient oxidation of sphalerite and lower Tl recovery of the oxidisable fraction was identified. Incontrast, the BCR SE seems to produce well predictable results of Tl leaching from Tl-bearing calcite and feldspar. Only 70% of total Tl content was extracted from Tl-modified illite, i.e., Tl was strongly fixed to the illite matrix.

Název v anglickém jazyce

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

Popis výsledku anglicky

This work focused on the specific behavior of Tl-bearing phases in the BCR sequential extraction (SE) scheme, namely Tl-bearing ferrihydrite, goethite, birnessite, calcite, illite, sphalerite and feldspar in their simple model mixtures with quartz. The amount of Tl released as the exchangeable/acid-extractable fraction (55?82% of the total Tl content) showed a substantial H+-promoted dissolution of all Fe(III) and Mn(III,IV) oxides (corresponding to up to 61% of solid Fe dissolved) and incongruent extraction of Tl from ferrihydrite and goethite. Reductive conditions of the second SE step were insufficient to complete goethite dissolution. Similarly, insufficient oxidation of sphalerite and lower Tl recovery of the oxidisable fraction was identified. Incontrast, the BCR SE seems to produce well predictable results of Tl leaching from Tl-bearing calcite and feldspar. Only 70% of total Tl content was extracted from Tl-modified illite, i.e., Tl was strongly fixed to the illite matrix.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DF - Pedologie

OECD FORD obor

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Projekt

<a href="/cs/project/GP526%2F08%2FP428" target="_blank" >GP526/08/P428: Biogeochemie thalia v kontaminovaném lesním, zemědělském a fluviálním ekosystému</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hazardous Materials

ISSN

0304-3894

e-ISSN

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Svazek periodika

176

Číslo periodika v rámci svazku

1-3

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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