The immobilisation of heavy metals from sewage sludge ash in geopolymer mortars
Authors:
- Mateusz Sitarz,
- Tomasz Zdeb,
- João Castro Gomes,
- Erick Grünhäuser Soare,
- Izabela Hager
Abstract
Sewage sludge is a semi-solid waste material created as a result of the sewage treatment of industrial or municipal wastewater. Because the laws and regulations of the European Union require not only a reduction in waste generation but also the preparation of waste for reuse and disposal, it is necessary to look for new methods of the application of sewage sludge as part of sustainable waste management. In this study, ash formed as a result of the combustion of sewage sludge from the sewage treatment plant in Płaszów, Krakow in a fluidised bed furnace at a temperature of around 800°C was used. Sewage sludge ash (SSA) contains over 30% SiO2 and approx. 10% Al2O3, which indicates potential applications in geopolymer materials. In this study, samples of geopolymer mortars with a binder containing sewage sludge ash as well as fly ash (FA) and ground granulated blast furnace slag (GGBFS) were prepared. The mechanical parameters were determined after 2, 7, 14, and 28 days. The results show that the sewage sludge ash-based geopolymer shows binding properties at ambient temperature and, depending on the presence of FA and/or GGBFS, the compressive strength varies from 5 to 45 MPa after 28 days. The aim of the research was also to determine the total content of heavy metals (Sb, As, Cr, Cd, Cu, Ni, Pb, Hg, Zn) in the raw materials used and their leachability from the structure of the hardened materials. Immobilisation of heavy metals is very promising. Based on the results of tests, it seems possible to use SSA in geopolymer materials, but not as the main component of the binder.
- Record ID
- CUT42f3bbc2db9144dc999e8b8e49af029d
- Publication categories
- ; ;
- Author
- Pages
- [1-8]
- Other elements of collation
- tab.; wykr.; Bibliografia (na s.) - 7-8; Bibliografia (liczba pozycji) - 34; Oznaczenie streszczenia - Abstr.
- Substantive notes
- Section: E-mobility, Sustainable Materials and Technologies
- Book
- Tracz Tomasz, Tomasz Tracz Mróz Katarzyna, Katarzyna Mróz Zdeb Tomasz Tomasz Zdeb (eds.): MATBUD’2020 – Scientific-Technical Conference: E-mobility, Sustainable Materials and Technologies, MATEC Web of Conferences, no. 322, 2020, [S.l.], EDP Sciences, ISBN 978-2-7598-9108-5
- Keywords in English
- sewage sludge ash, geopolymer, immobilisation of heavy metals
- DOI
- DOI:10.1051/matecconf/202032201026 Opening in a new tab
- URL
- https://www.matec-conferences.org/articles/matecconf/abs/2020/18/matecconf_matbud2020_01026/matecconf_matbud2020_01026.html Opening in a new tab
- Related project
- E-mobilność oraz zrównoważone materiały i technologie. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 5
- Additional fields
- Indeksowana w: Web of Science
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT42f3bbc2db9144dc999e8b8e49af029d/
- URN
urn:pkr-prod:CUT42f3bbc2db9144dc999e8b8e49af029d
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.