Immobilization of heavy metals in fly ash-diatomite modified magnesia cement composite

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00379960" target="_blank" >RIV/68407700:21110/24:00379960 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.5593/sgem2024/6.1/s26.38" target="_blank" >https://doi.org/10.5593/sgem2024/6.1/s26.38</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2024/6.1/s26.38" target="_blank" >10.5593/sgem2024/6.1/s26.38</a>

Result language

angličtina

Original language name

Immobilization of heavy metals in fly ash-diatomite modified magnesia cement composite

Original language description

Every day, human activities generate large amounts of solid waste. To ensure the quality of the environment, waste must be further treated to prevent it from accumulation in landfills. In the case of materials that cannot be recycled or reused, such as municipal solid waste, burning in waste incineration plants to generate heat or electricity appears to be the appropriate solution of such waste disposal. However, combustion processes generate residues, such as bottom or fly ash, which must be stored. Fly ash generally contains heavy metals and other contaminants. If it is disposed in landfills, the contained substances may pollute the environment with dust, leach into the soil, and contaminate the groundwater. Therefore, it is important to find an alternative way to dispose fly ash, such as incorporation into building materials, which must provide sufficient and save immobilisation of heavy metals. The objective of the presented research was to utilize fly ash from waste incineration plant and diatomaceous earth in magnesia-based composites in the form of microfillers. The investigation focused on the determination of the material properties of the hardened composites with emphasis on the ability to immobilise heavy metals. Incorporation of fly ash and diatomaceous earth resulted in increased porosity and water absorption. The mechanical strength was also affected and reduced by the incorporation of both microfillers. On the other hand, the immobilisation test showed that the heavy metals contained in the fly ash were safely immobilised in the material and thus they are not able to be further released into the environment. In this way, hazardous waste can be safely treated and reused, and the amount of waste in landfills can be reduced.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA23-04744S" target="_blank" >GA23-04744S: Research of heavy metals immobilization in alternative low-carbon composites</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Article name in the collection

Proceedings of 24th International Multidisciplinary Scientific GeoConference SGEM 2024

ISBN

978-619-7603-74-3

ISSN

1314-2704

e-ISSN

1314-2704

Number of pages

8

Pages from-to

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Publisher name

STEF92 Technology Ltd.

Place of publication

Sofia

Event location

Albena

Event date

Jun 29, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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