RT Journal Article
T1 Valorisation diagnosis of waste from the decontamination of phosphogypsum leachates through a combined calcium carbonate/hydroxide process
A1 Soto Cruz, Francisco Javier
A1 Pérez Moreno, Silvia María
A1 Ceccotti Rodríguez, Estefanía Inés
A1 Barba Lobo, Alejandro
A1 Bolívar Raya, Juan Pedro
A1 Casas Ruiz, Melquiades
A1 Gázquez González, Manuel Jesús
AB Phosphogypsum is an industrial waste considered as naturally occurring radioactive material.Stack disposal and exposure to the environmental condition involve the production of acidleachates with high potential pollutant loads as heavy metals and radionuclides. In this study, asequential neutralisation process was applied for cleaning the generated releases, and the twoobtained residues were characterised from the physical-chemical and radiological point of viewbefore their valorisation. The cleaning process was made up of two steps: the first one usingcalcium carbonate until pH = 3.5, and the second one using calcium hydroxide until pH = 12. Theresidue obtained in the first step was mostly calcium fluoride, while in the second step mostphosphates were precipitated, mainly as hydroxyapatite. The final liquid was treated to reducepH lower than 9, which is the limit included in the current directive for discharges of liquid effluentsinto coastal waters. The main conclusion was that the solids from the first step could bevalorised as an additive in the manufacture of commercial Portland cements and ceramics, whilethe solids from the second step could be used as raw material for the phosphoric acidmanufacture.
PB Elsevier
SN 2405-8440 (electrónico)
YR 2024
FD 2024-05
LK https://hdl.handle.net/10272/23964
UL https://hdl.handle.net/10272/23964
LA eng
NO Soto-Cruz, F. J., Pérez-Moreno, S. M., Ceccotti, E., Barba-Lobo, A., Bolívar, J. P., Casas-Ruiz, M., & Gázquez, M. J. (2024). Valorisation diagnosis of waste from the decontamination of phosphogypsum leachates through a combined calcium carbonate/hydroxide process. In Heliyon (Vol. 10, Issue 9, p. e30610). Elsevier BV. https://doi.org/10.1016/j.heliyon.2024.e30610
NO This research was funded by the following projects: Operative FEDER Program-Andalucía 2014–2020 (UHU-1255876, UHU-202020); Grants PID2020-116461RB-C21 and 116461RA-C22) funded by MICIU/AEI/10.13039/501100011033; Research grant UCA/REC44VPCT/2021, by the University of C´adiz; Andalusian government (I + D + i-JAPAIDI-Retos project PY20_00096); Grant TED2021-130361B–I00 funded by MICIU/AEI/10.13039/501100011033 and, by “European Union NextGenerationEU/PRTR”, and Campus de Excelencia Internacional del Mar (CEIMAR) (research project CEIJ-C07.2). The authors thank Fertiberia S.A. for their support in obtaining the water samples used in this study.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026