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Content Provider | World Health Organization (WHO)-Global Index Medicus |
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Author | Cárdenas-Escudero, C. Esquivias, L. Morales-Flórez, V. Santos, A. Pérez-López, R. |
Spatial Coverage | Spain |
Description | Country affiliation: Spain Author Affiliation: Cárdenas-Escudero C ( Departamento de Física de la Materia Condensada, Facultad de Física, Universidad de Sevilla, Av. Reina Mercedes s/n, 41012 Seville, Spain.) |
Abstract | Industrial wet phosphoric acid production in Huelva (SW Spain) has led to the controversial stockpiling of waste phosphogypsum by-products, resulting in the release of significant quantities of toxic impurities in salt marshes in the Tinto river estuary. In the framework of the fight against global climate change and the effort to reduce carbon dioxide emissions, a simple and efficient procedure for CO(2) mineral sequestration is presented in this work, using phosphogypsum waste as a calcium source. Our results demonstrate the high efficiency of portlandite precipitation by phosphogypsum dissolution using an alkaline soda solution. Carbonation experiments performed at ambient pressure and temperature resulted in total conversion of the portlandite into carbonate. The fate of trace elements present in the phosphogypsum waste was also investigated, and trace impurities were found to be completely transferred to the final calcite. We believe that the procedure proposed here should be considered not only as a solution for reducing old stockpiles of phosphogypsum wastes, but also for future phosphoric acid and other gypsum-producing industrial processes, resulting in more sustainable production. |
ISSN | 03043894 |
Volume Number | 196 |
e-ISSN | 18733336 |
Journal | Journal of Hazardous Materials |
Language | English |
Publisher | Elsevier |
Publisher Date | 2011-11-30 |
Publisher Place | Netherlands |
Access Restriction | Subscribed |
Subject Keyword | Calcium Sulfate Chemistry Carbon Dioxide Isolation & Purification Environmental Restoration And Remediation Methods Industrial Waste Prevention & Control Phosphorus Refuse Disposal Environmental Monitoring Analysis Spain Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
Content Type | Text |
Resource Type | Article |
Subject Domain (in MeSH) | Inorganic Chemicals Complex Mixtures Technology, Industry, and Agriculture Environment and Public Health Geographic Locations |
Subject | Environmental Engineering Health, Toxicology and Mutagenesis Waste Management and Disposal Pollution Environmental Chemistry |
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