Characterising an abandoned phosphogypsum deposit by combining radiological, geophysical, geochemical, and statistical techniques
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AuthorVásconez Maza, Marco David; Bueso Sánchez, María del Carmen; Mulas Pérez, Javier; Faz Cano, Ángel; Martínez Segura, Marcos Antonio
Knowledge AreaMecánica de Fluidos
SponsorsThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Realizado en/conUniversidad Politécnica de Cartagena
Bibliographic CitationMarco D. Vásconez-Maza, María C. Bueso, Javier Mulas, Ángel Faz, Marcos A. Martínez-Segura, Characterising an abandoned phosphogypsum deposit by combining radiological, geophysical, geochemical, and statistical techniques, CATENA, Volume 216, Part B, 2022, 106401, ISSN 0341-8162, https://doi.org/10.1016/j.catena.2022.106401.
Electrical resistivity tomography
Phosphoric fertiliser has enormously contributed to agriculture; however, it generates five tonnes of phosphogypsum per ton of phosphoric acid synthesised. Phosphogypsum houses heavy metals and long-lived radioactive elements that represents an environmental issue requiring remediation. This paper presents a methodology for characterising phosphogypsum deposits using geophysical, geochemical, and statistical tools. Gamma-ray probes determined the abnormal radioactive zones within the phosphogypsum deposits while electrical resistivity tomography provided the geometry and distribution of the phosphogypsum deposits. Chemical results confirmed the high presence of heavy metals in the waste determining chromium as the most concentrated metal. Radiological measures indicate that the effective ambient dose equivalent average in the study area surface is approximately 8.5 times higher than the average for Europe. While at 1.0 m depth, in the phosphogypsum layer, the ambient dose equivalent ...
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