Open Access
Subscription Access
Open Access
Subscription Access
Thermal and Acid Oxidative Strategy to Recovery Selenium and Silver from Eucairite CuAgSe
Subscribe/Renew Journal
Sulphides and selenides are mineral species that commonly occur together in natural deposits, according to the relative abundance. Moreover, the emerging importance of selenium in several fields of sciences, the economic value of the metal silver, commonly associated to selenide by chemical affinity and the existence of selenium deposits in Argentina lead to study the CuAgSe eucairite oxidation process in air atmosphere, by thermal and acid treatments in order to the Se and Ag recovery. The analysis was carried out with pure mineral by means of (TGA-DTGA) Thermogravimetric technique, X-ray Diffraction (XRD), Infrared Spectroscopy (FTIR), Chemical analysis, Scanning Electron Microscopy (SEM-EDS) and treatments with HCl, H2SO4 and HNO3 (0.1 M, up to 180 min and 60 ºC). Thermal oxidation permits the separation of SeO2(g) from a solid residue in the 500-750 ºC range, whereas the adequate combination of soft acid and thermal treatments can be formulated as a potential strategy to separate Agº from a copper (II) solution.
Keywords
Eucairite, Thermal Effects, acid Oxidative Effects, TGA and FTIR Studies
Subscription
Login to verify subscription
User
Font Size
Information
- Dunn J.G., The oxidation of sulphide minerals, Thermochim. Acta. 300; 1997: 127-139
- Javeed A., Mohammad A., Mark V., Burton A., Raftery N. A., Hillier J., O’Brien I.H. Understanding, Decomposition Pathways of Mixed Sulfur/Selenium Lead Phosphinato Complexes Explaining the Formation of Lead Selenide, Journal of Physical Chemistry C. 115(34); 2011: 16904-16909.
- Corkhill C.L., Vaughan D.J., Arsenopyrite oxidation – A review, Applied Geochemistry. 24; 2009: 2342-2361
- Simon G., Essene E. J. Phase relations among selenides, sulfides, tellurides and oxides;
- I, Thermodynamic properties and calculated equilibria, Economic Geology. 91; 1996: 1187-1208
- Floor G.H., Román-Ross G. Selenium in volcanic environments – A review, Applied Geochemistry. 27; 2012: 517-531
- Verma, V.P., A review of synthetic, thermoanalytical, IR, Raman and X-ray studies on metal selenites, Termochim.Acta. 327: 1999: 63-102
- Angelelli V., Brodtkorb M.K., Gordillo C.E., Gay H.D. Las especies minerales de la República Argentina, Special publication, Servicio Minero Nacional (Argentina). 1983.
- Paar W.H., Sureda R., Brodtkorb M.K. Revista de la Asoc. Geológica Argentina. 51; 1966: 304-312
- Chen L., Yang F., Xu J., Hu Y., Hu Q., Zhang Y. and Pan G. Determination of Selenium Concentration of Rice in China and Effect of Fertilization of Selenite and Selenate on Selenium Content of Rice, J. Agric. Food Chem. 50, (18); 2002: 5128- 5130
- Kaim W., Schwederski B. Bioinorganic Chemistry: Inorganic Elements in the Chemistry of Life, John Wiley Sons. 1994.
- Ramoutar R.R., Brumaghim J.L. Antioxidant and anticancer properties and mechanism of inorganic selenium, oxo-sulfur and oxo-selenium compounds, Cell Biochem Biophys. 58; 2010: 1- 23
- Okkonen P., Hiltunen L., Koskenlinna M., Niinisto L., Crystal structure and thermal stability of silver selenite, Acta Chem. Scandinavica. 48; 1994: 857-860
- Cotton F.A. and Wilkinson G., Advanced Inorganic Chemistry, Wiley & Sons. 1997.
- Frueh A.J. (jr), Czamanske G.K., Knight Ch., The Crystalopraphy of Eucairite, CuAgSe, Z. Krist. 108; 1957: 389- 396
- Kostov I., Minceva-Stefanova J., Sulphide Minerals, Crystal Chemistry, Paragenesis and Systematics, Bulgarian Acad. Sci.- Institute of Geology, Stuttgart. 1982.
- Ross S.D. Inorganic Infrared and Raman Spectra, Mc Graw Hill. 1972.
- Dunn J.G.; Ginting A.R.; Oconnor B.; A Thermoanalytical Study of the Oxidation of Chalcocite, Journal of thermal analysis. 41, (2-3); 1994: 671-686
- Yunmei Y., Yongxuan Z., Williams-Jones A.E., Zhenmin G., Dexian L., A kinetic study of the oxidation of arsenopyrite in acidic solutions: implications for the environment, Applied Geochemistry. 19; 2004: 435-444.
Abstract Views: 283
PDF Views: 6