RT Journal Article
T1 Immobilization of Hazardous Wastes on One-Part Blast Furnace Slag-Based Geopolymers
A1 Paz Gómez, Daniela Carolina
A1 Silveirinha Vilarinho, Inês
A1 Pérez Moreno, Silvia María
A1 Carvalheiras, João
A1 Guerrero Márquez, José Luis
A1 Miguel Novais, Rui
A1 Seabra, Maria Paula
A1 Ríos Ransanz, Guillermo
A1 Bolívar Raya, Juan Pedro
A1 Labrincha, João António
AB : The immobilization of hazardous wastes in ordinary Portland cement (OPC)-based materials has been widely studied and implemented. OPC-based materials have a high carbon footprintassociated with their production and geopolymer materials are a sustainable and eco-friendly alternative. Therefore, this work aimed to immobilize two hazardous industrial wastes: copper wastewatersludge and phosphogypsum in one-part geopolymer materials. For that purpose, the precursor waspartially substituted by these wastes (5, 10 and 20 wt.%) in the formulations. The geopolymer freshand hardened state properties were evaluated, and the immobilisation of pollutants was determinedthrough leaching tests. In phosphogypsum pastes (PG5, PG10 and PG20) it was observed that thecompressive strength decreased with the increase in its amount, varying between 67 MPa and 19 MPa.In copper sludge pastes, the compressive strength of the specimens (CWS5 and CWS10) reached~50 MPa. The mortars, MPG10 and MCWSs10, had compressive strengths of 13 MPa and 21 MPa,respectively. Leaching tests showed that pastes and mortars immobilise the hazardous species ofthe wastes, except for As from copper sludge, whose the best result was found in the compact paste(CWSs10) that leached 2 mg/kg of As. Results suggest that optimized compositions are suitable forthe construction sector
PB MDPI
SN 2071-1050 (electrónico)
YR 2021
FD 2021
LK http://hdl.handle.net/10272/20352
UL http://hdl.handle.net/10272/20352
LA eng
NO Paz-Gómez, D. C., Vilarinho, I. S., Pérez-Moreno, S. M., Carvalheiras, J., Guerrero, J. L., Novais, R. M., Seabra, M. P., Ríos, G., Bolívar, J. P., & Labrincha, J. A. (2021). Immobilization of Hazardous Wastes on One-Part Blast Furnace Slag-Based Geopolymers. In Sustainability (Vol. 13, Issue 23, p. 13455). MDPI AG. https://doi.org/10.3390/su132313455
NO This research was funded by Ministerio de Ciencia e Innovación (MICINN), grant numberPID2020-116461RB-C21 and Agencia de Innovación y Desarrollo de Andalucía (IDEA) grant numberUHU-1255876. This work was done in the scope of the project CICECO- Aveiro Institute of Materials,UIDB/50011/2020 & UIDP/50011/2020, co-financed by national funds through the FCT/MEC. Thisresearch was funded by FCT (Portuguese Foundation for Science and Technology), grant number2020.01135.CEECIND (R.M.N.) and SFRH/BD/144562/2019 (J.C.)
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026