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2015, vol. 56, br. 3, str. 340-344
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Interakcija heksavalentnog hroma i BSCF perovskita u vodenoj sredini
Interaction of hexavalent chromium and BSCF perovskite in water solutions
aUniverzitet u Banjoj Luci, Prirodno-matematički fakultet, Republika Srpska, BiH bUniverzitet u Banjoj Luci, Medicinski fakultet, Farmacija, Republika Srpska, BiH cUniverzitet u Banjoj Luci, Tehnološki fakultet, Republika Srpska, BiH dUniverzitet u Istočnom Sarajevu, Tehnološki fakultet, Zvornik, Republika Srpska, BiH
e-adresa: sasa.zeljkovic@unibl.rs
Sažetak
U ovoj studiji je praćena interakcija BSCF perovskita i heksavalentnog hroma u vodenoj sredini kako bi se obezbijedile korisne informacije o hemizmu i ponašanju ovog materijala. Eksperimenti adsorpcije su izvedeni sistematično i u serijama kako bi se ispitali uticaji dužine kontakta, temperature i inicijalne koncentracije metalnih jona. Podaci su opisani Freundlichovim i Langmuirovim adsorpcionim modelom. Termodinamička studija adsorpcije heksavalentnog hroma na BSCF perovskitu pokazala je da je spontani proces adsorpcije favorizovan pri višim temperaturama (od 343K) zavisno od koncentracije hroma u vodenoj sredini.
Abstract
In this study, interaction of BSCF perovskite and hexavalent chromium in the aqueous solution was followed to provide additional useful insight in chemistry and behavior of this material. Adsorption experiments were carried out systematically by batch experiments to investigate the influence of contact time, temperature and initial concentration of metal ions. The adsorption data obtained were described by the Freundlich and Langmuir adsorption isotherm model. Thermodynamic study of hexavalent chromium adsorption on BSCF perovskite showed that the spontaneous adsorption process will be favored at higher temperatures (from 343 K) depending on the chromium concentration in water.
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Reference
|
|
  
|
Bucher, E., Egger, A., Ried, P., Sitte, W., Holtappels, P. (2008) Oxygen nonstoichiometry and exchange kinetics of Ba0.5Sr0.5Co0.8Fe0.2O3−δ. Solid State Ionics, 179(21-26): 1032-1035
|
|
|
Fergus, J. (2007) Effect of cathode and electrolyte transport properties on chromium poisoning in solid oxide fuel cells. International Journal of Hydrogen Energy, 32(16): 3664-3671
|
|
|
Fergus, J.W. (2005) Metallic interconnects for solid oxide fuel cells. Materials Science and Engineering: A, 397(1-2): 271-283
|
|
|
Granados-Correa, F., Jiménez-Becerril, J. (2009) Chromium (VI) adsorption on boehmite. Journal of Hazardous Materials, 162(2-3): 1178-1184
|
|
|
Hilpert, K. (1996) Chromium Vapor Species over Solid Oxide Fuel Cell Interconnect Materials and Their Potential for Degradation Processes. Journal of The Electrochemical Society, 143(11): 3642
|
|
|
Jiang, S.P., Zhen, Y. (2008) Mechanism of Cr deposition and its application in the development of Cr-tolerant cathodes of solid oxide fuel cells. Solid State Ionics, 179(27-32): 1459-1464
|
|
|
Kim, Y., Chen, X., Jiang, S.P., Bae, J. (2011) Chromium Deposition and Poisoning at Ba0.5Sr0.5Co0.8Fe0.2O3−δ Cathode of Solid Oxide Fuel Cells. Electrochemical and Solid-State Letters, 14(4): B41
|
|
|
Mcintosh, S., Vente, J., Haije, W., Blank, D., Bouwmeester, H. (2006) Structure and oxygen stoichiometry of SrCo0.8Fe0.2O3−δ and Ba0.5Sr0.5Co0.8Fe0.2O3−δ. Solid State Ionics, 177(19-25): 1737-1742
|
|
|
Palmer, C.D., Puis, R.W. (1994) Natural attenuation of hexavalent chromium in groundwater and soils. Washington: U.S. EPA, 1-12
|
|
|
Stanislowski, M., Wessel, E., Hilpert, K., Markus, T., Singheiser, L. (2007) Chromium Vaporization from High-Temperature Alloys. Journal of The Electrochemical Society, 154(4): A295
|
|
|
Zeljkovic, S., Ivas, T., Vaucher, S., Jelic, D., Gauckler, L. (2014) The changes of Ba0.5Sr0.5Co0.8Fe0.2O3-δ perovskite oxide on heating in oxygen and carbon dioxide atmospheres. Journal of the Serbian Chemical Society, 79(9): 1141-1154
|
|
|
Zeljković, S., Jelić, D., Levi, Z., Penavin-Škundrić, J., Vranković, D., Vujnić, S. (2013) u: Proceedings of the conference - Contemporary materials, Banja Luka, p. 129-137
|
|
|
Zeng, P., Chen, Z., Zhou, W., Gu, H., Shao, Z., Liu, S. (2007) Re-evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3-δ perovskite as oxygen semi-permeable membrane. J. Membr. Sci, 291, 148-156
|
|
|
Zhu, W.Z., Deevi, S.C. (2003) Opportunity of metallic interconnects for solid oxide fuel cells: a status on contact resistance. Materials Research Bulletin, 38(6): 957-972
|
|
|
|
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