dc.contributor.author | Papanicolaou, F. | en |
dc.contributor.author | Antoniou, Stella | en |
dc.contributor.author | Pashalidis, Ioannis | en |
dc.creator | Papanicolaou, F. | en |
dc.creator | Antoniou, Stella | en |
dc.creator | Pashalidis, Ioannis | en |
dc.date.accessioned | 2019-11-21T06:21:59Z | |
dc.date.available | 2019-11-21T06:21:59Z | |
dc.date.issued | 2010 | |
dc.identifier.issn | 0265-931X | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/55954 | |
dc.description.abstract | The present study aims to assess the effect of redox conditions existing within the tailings dump on the stability of phosphogypsum (e.g. sulphate reduction) and uranium(VI). Phosphogypsum sampling and in-situ measurements were carried out at a coastal tailings dump in Vasiliko Cyprus, pH, EH and solubility experiments were performed in simulated laboratory systems and thermodynamic calculations using MINTEQA2. Generally, in the open tailings dump oxidizing conditions predominate stabilizing sulphur and uranium in their hexavalent oxidation states. On the other hand, after the application of a soil/vegetative cover and in the presence of natural organic matter, anoxic conditions prevail (EH<-70mV) resulting in S(VI) and U(VI) reduction to S(-II) and U(IV), respectively. Although, the sulphide anion can form very insoluble compounds with heavy metal ions (e.g. Cd(II), Pb(II) etc.) and U(IV) oxide has very low solubility, partial reduction of sulphate to sulphide within gypsum may affect the stability of phosphogypsum resulting in enhanced erosion of the material by rain- and seawater and washing out of contaminants in particulate/colloidal form. © 2010 Elsevier Ltd. | en |
dc.source | Journal of environmental radioactivity | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-77953025523&doi=10.1016%2fj.jenvrad.2010.03.006&partnerID=40&md5=420f31f1ad2b09c06062038ec5d8afb1 | |
dc.subject | article | en |
dc.subject | chemical analysis | en |
dc.subject | Solubility | en |
dc.subject | System stability | en |
dc.subject | thermodynamics | en |
dc.subject | Oxidation-Reduction | en |
dc.subject | calculation | en |
dc.subject | Metal ions | en |
dc.subject | Lead compounds | en |
dc.subject | solid | en |
dc.subject | Hydrogen-Ion Concentration | en |
dc.subject | Seawater | en |
dc.subject | Biological materials | en |
dc.subject | Sulfur | en |
dc.subject | Lead | en |
dc.subject | Environmental Monitoring | en |
dc.subject | oxidation | en |
dc.subject | Phosphogypsum | en |
dc.subject | Uranium | en |
dc.subject | sea water | en |
dc.subject | Transuranium elements | en |
dc.subject | sulfate | en |
dc.subject | PH | en |
dc.subject | Phosphorus | en |
dc.subject | Metal refining | en |
dc.subject | Oxidizing conditions | en |
dc.subject | oxidation reduction state | en |
dc.subject | rain | en |
dc.subject | calcium sulfate | en |
dc.subject | Oxidation state | en |
dc.subject | Natural organic matters | en |
dc.subject | Gypsum | en |
dc.subject | Uranium compounds | en |
dc.subject | Cadmium compounds | en |
dc.subject | Anoxic conditions | en |
dc.subject | Cadmium | en |
dc.subject | erosion | en |
dc.subject | In-situ measurement | en |
dc.subject | Insoluble compounds | en |
dc.subject | Laboratory system | en |
dc.subject | oxygen diffusion | en |
dc.subject | Partial reduction | en |
dc.subject | radioactive pollution | en |
dc.subject | Redox | en |
dc.subject | Redox chemistry | en |
dc.subject | Redox condition | en |
dc.subject | redox conditions | en |
dc.subject | Sulfates | en |
dc.subject | Sulphate reduction | en |
dc.subject | Sulphates | en |
dc.subject | Sulphur | en |
dc.subject | tailings | en |
dc.subject | Thermodynamic calculations | en |
dc.subject | Washing-out | en |
dc.title | Redox chemistry of sulphate and uranium in a phosphogypsum tailings dump | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.jenvrad.2010.03.006 | |
dc.description.volume | 101 | |
dc.description.issue | 8 | |
dc.description.startingpage | 601 | |
dc.description.endingpage | 605 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :7</p> | en |
dc.source.abbreviation | J.Environ.Radioact. | en |
dc.contributor.orcid | Pashalidis, Ioannis [0000-0002-7587-6395] | |
dc.gnosis.orcid | 0000-0002-7587-6395 | |