A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925779" target="_blank" >RIV/60461373:22310/22:43925779 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21110/22:00364106 RIV/00216305:26310/23:PU147946
Result on the web
<a href="https://www.mdpi.com/1996-1944/15/10/3653" target="_blank" >https://www.mdpi.com/1996-1944/15/10/3653</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/ma15103653" target="_blank" >10.3390/ma15103653</a>

Result language
angličtina
Original language name
A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash
Original language description
The article describes chemical and also selected physical properties of ponded high temperature fly ash (FA) and bottom ash (BA) from a Melnik lignite power plant located in the Czech Republic. The research was carried out on samples obtained from drills with a depth of up to 54 m and the age of the samples retrieved from the lowest layers of the stockpile dating back to 1960. At the same time, a comparison was made with fresh fly ash and fresh bottom ash obtained from the identical power plant. The study analyzed a total of 98 stockpile samples. The properties selected were studied across the entire stockpile, namely moisture content, specific density, specific surface, carbon content, elemental and phase composition, pH, electrical conductivity and leachability. SEM analyses were also performed. The performed measurements of chemical properties proved the chemical stability of the material even after several decades of storage in the stockpile. The largest changes are evident in the results of the analyses related to the leachability of SO3, Cl- and F-. In contrast, the pH does not change significantly, and the composition is pH neutral or alkaline. Regarding ponded BA, particle disintegration was noted depending on the increasing core borehole depth.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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