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https://olympias.lib.uoi.gr/jspui/handle/123456789/10005Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Vaimakis, T. C. | en |
| dc.contributor.author | Economou, E. D. | en |
| dc.contributor.author | Trapalis, C. C. | en |
| dc.date.accessioned | 2015-11-24T16:53:21Z | - |
| dc.date.available | 2015-11-24T16:53:21Z | - |
| dc.identifier.issn | 1388-6150 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/10005 | - |
| dc.rights | Default Licence | - |
| dc.subject | calorimetric | en |
| dc.subject | kinetic mechanism | en |
| dc.subject | phosphorite dissolution | en |
| dc.subject | carbonate minerals | en |
| dc.subject | calcite dissolution | en |
| dc.subject | phosphate ores | en |
| dc.subject | leaching kinetics | en |
| dc.subject | citric-acid | en |
| dc.subject | beneficiation | en |
| dc.subject | tool | en |
| dc.title | Calorimetric study of dissolution kinetics of phosphorite in diluted acetic acid | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.identifier.primary | DOI 10.1007/s10973-007-8025-8 | - |
| heal.identifier.secondary | <Go to ISI>://000257023200024 | - |
| heal.identifier.secondary | http://www.springerlink.com/content/505441ln10144416/fulltext.pdf | - |
| heal.language | en | - |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.publicationDate | 2008 | - |
| heal.abstract | In this report, we present a thermodynamic and kinetic study of the selective dissolution of calcite from low-grade phosphate ores (Epirus area, Greece) by dilute acetic acid at isothermal conditions. A twin calorimeter with two identical membrane vessels, for the acid dissolution process, and for the reference was used. The curves of rate vs. time of the phosphorite dissolution for various temperatures show that the maximum (q(max).) was increased, whereas the time (t(peak)) to achieve the corresponding q(max) values was decreased, as the experimental temperature was increased. The dissolution enthalpy was increased from 13.1 to 16.7 kJ mol(-1), as the experimental temperature was increased from 10.0 to 28.0 degrees C. The chemical analysis of the supernatant solutions shows that the main process was the calcite dissolution. The reaction model with general form, ln(1/1(1-X))=kt(m), was found to fitted the experimental data regardless of the experimental temperature. These results were assigned in the presence of two different kinds of particles in the phosphorite. The activation energy of the dissolution process was found 69.7 kJ mol(-1). The SEM micrographs of acid dissolution samples showed two different textures after acid dissolution. | en |
| heal.publisher | Springer Verlag (Germany) | en |
| heal.journalName | Journal of Thermal Analysis and Calorimetry | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά). ΧΗΜ | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Vaimakis-2008-Calorimetric study o.pdf | 351.73 kB | Adobe PDF | View/Open Request a copy |
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