Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix

The production of phosphoric acid from natural phosphate rock by means of the wet process gives rise to an industrial by-product named phosphogypsum (PG). World PG generation is estimated to be around 100-280 million tonnes/year. PG is mainly composed of gypsum but also contains a high level of impu...

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Autores: Tayibi, Hanan, López-Delgado, Aurora, Choura, Mohamed, Gascó, Catalina, Navarro, Nuria, Alguacil, Francisco José, López Gómez, Félix Antonio
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/11233
Acceso en línea:http://hdl.handle.net/10261/11233
Access Level:acceso abierto
Palabra clave:phosphogypsum
radionuclides
sulphur polymer concrete
stabilisation/solidification
TENORM
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spelling Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrixTayibi, HananLópez-Delgado, AuroraChoura, MohamedGascó, CatalinaNavarro, NuriaAlguacil, Francisco JoséLópez Gómez, Félix Antoniophosphogypsumradionuclidessulphur polymer concretestabilisation/solidificationTENORMThe production of phosphoric acid from natural phosphate rock by means of the wet process gives rise to an industrial by-product named phosphogypsum (PG). World PG generation is estimated to be around 100-280 million tonnes/year. PG is mainly composed of gypsum but also contains a high level of impurities such as phosphates, fluorides, naturally occurring radionuclides, heavy metals, and other trace elements. All of this adds up to a negative environmental impact and many restrictions on PG applications. PG is disposed of without any treatment, usually by dumping in large stockpiles that occupy considerable land areas and cause serious environmental damage, particularly in coastal regions. The USEPA has classified PG as a “Technologically Enhanced Naturally Occurring Radioactive Material” (TENORM). This paper reports a proposed PG stabilisation/solidification (S/S) process by means of sulphur polymer concrete. Final products have been obtained in the form of standard monoliths. Mechanical properties (compressive and flexural strength) have been studied and radionuclide contents determined. Results show the obtainment of sulphur and phosphogypsum concretes with good mechanical properties and low radionuclide contents. The PG S/S process can thus be considered a very suitable and efficient option for PG disposal.AECI (project Nº A/5537/06) and to the Spanish National R&D&I Plan (Project CTQ2008-02012/PPQ) for the financial support of this study.Peer reviewed200920092009info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65011204500 bytesapplication/pdfhttp://hdl.handle.net/10261/11233reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglésinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/112332026-05-22T06:33:51Z
dc.title.none.fl_str_mv Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
title Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
spellingShingle Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
Tayibi, Hanan
phosphogypsum
radionuclides
sulphur polymer concrete
stabilisation/solidification
TENORM
title_short Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
title_full Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
title_fullStr Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
title_full_unstemmed Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
title_sort Preliminary studies of a phosphogypsum stabilisation process using a sulphur polymer matrix
dc.creator.none.fl_str_mv Tayibi, Hanan
López-Delgado, Aurora
Choura, Mohamed
Gascó, Catalina
Navarro, Nuria
Alguacil, Francisco José
López Gómez, Félix Antonio
author Tayibi, Hanan
author_facet Tayibi, Hanan
López-Delgado, Aurora
Choura, Mohamed
Gascó, Catalina
Navarro, Nuria
Alguacil, Francisco José
López Gómez, Félix Antonio
author_role author
author2 López-Delgado, Aurora
Choura, Mohamed
Gascó, Catalina
Navarro, Nuria
Alguacil, Francisco José
López Gómez, Félix Antonio
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv phosphogypsum
radionuclides
sulphur polymer concrete
stabilisation/solidification
TENORM
topic phosphogypsum
radionuclides
sulphur polymer concrete
stabilisation/solidification
TENORM
description The production of phosphoric acid from natural phosphate rock by means of the wet process gives rise to an industrial by-product named phosphogypsum (PG). World PG generation is estimated to be around 100-280 million tonnes/year. PG is mainly composed of gypsum but also contains a high level of impurities such as phosphates, fluorides, naturally occurring radionuclides, heavy metals, and other trace elements. All of this adds up to a negative environmental impact and many restrictions on PG applications. PG is disposed of without any treatment, usually by dumping in large stockpiles that occupy considerable land areas and cause serious environmental damage, particularly in coastal regions. The USEPA has classified PG as a “Technologically Enhanced Naturally Occurring Radioactive Material” (TENORM). This paper reports a proposed PG stabilisation/solidification (S/S) process by means of sulphur polymer concrete. Final products have been obtained in the form of standard monoliths. Mechanical properties (compressive and flexural strength) have been studied and radionuclide contents determined. Results show the obtainment of sulphur and phosphogypsum concretes with good mechanical properties and low radionuclide contents. The PG S/S process can thus be considered a very suitable and efficient option for PG disposal.
publishDate 2009
dc.date.none.fl_str_mv 2009
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/11233
url http://hdl.handle.net/10261/11233
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1204500 bytes
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instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
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