Heavy metals immobilization in coal combustion fly ash-portland cement composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00374498" target="_blank" >RIV/68407700:21110/23:00374498 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.5593/sgem2023V/6.2/s26.69" target="_blank" >https://doi.org/10.5593/sgem2023V/6.2/s26.69</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2023V/6.2/s26.69" target="_blank" >10.5593/sgem2023V/6.2/s26.69</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Heavy metals immobilization in coal combustion fly ash-portland cement composites

Popis výsledku v původním jazyce

In this study, the immobilization of As, Ba and Cu contained in fly ash from coal combustion was experimentally investigated. Fly ash was used to replace 10 wt.% and 20 wt.% of Portland cement (PC) and 0-2 mm silica sand was used as an aggregate. The evaluation of the basic physical and mechanical properties was carried out. Special attention was paid to the evaluation of the immobilization of the studied heavy metals in the prepared composites; the leaching test was performed with a liquid/solid ratio of 10 L/kg. The concentration of As, Ba and Cu in the leachates was analysed by atomic absorption spectroscopy (AAS). The results showed that the concentrations of the studied heavy metals in the leachates of the prepared composites were very low, which suggests that they were completely immobilized in the matrices. The mechanical resistance of the prepared mortars was slightly reduced by PC substitution by FA, but from the quantitative point of view it remained high enough for practical use of prepared composites in development of "green" building materials.

Název v anglickém jazyce

Heavy metals immobilization in coal combustion fly ash-portland cement composites

Popis výsledku anglicky

In this study, the immobilization of As, Ba and Cu contained in fly ash from coal combustion was experimentally investigated. Fly ash was used to replace 10 wt.% and 20 wt.% of Portland cement (PC) and 0-2 mm silica sand was used as an aggregate. The evaluation of the basic physical and mechanical properties was carried out. Special attention was paid to the evaluation of the immobilization of the studied heavy metals in the prepared composites; the leaching test was performed with a liquid/solid ratio of 10 L/kg. The concentration of As, Ba and Cu in the leachates was analysed by atomic absorption spectroscopy (AAS). The results showed that the concentrations of the studied heavy metals in the leachates of the prepared composites were very low, which suggests that they were completely immobilized in the matrices. The mechanical resistance of the prepared mortars was slightly reduced by PC substitution by FA, but from the quantitative point of view it remained high enough for practical use of prepared composites in development of "green" building materials.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/GA23-04744S" target="_blank" >GA23-04744S: Výzkum imobilizace těžkých kovů v alternativních nízkouhlíkových kompozitech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023,volume 23, issue 6.2

ISBN

978-619-7603-66-8

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

STEF92 Technology Ltd.

Místo vydání

Sofia

Místo konání akce

Vídeň

Datum konání akce

28. 11. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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