Abstract
FeSO4·H2O and FeSO4 represent the second valence of iron sulphates. Number of studies has been done to understand formation of intermediate sulphates like FeOHSO4 and Fe2O(SO4)2, representing the oxidation of Fe2+ to Fe3+. At selected temperatures, both the thermo-dynamical equilibrium in the Fe–S–O system and the formation of the crystal structures in the solid phase are controlled by the partial pressure of water vapour and oxygen in the gas phase. The effects of the temperature and the partial pressure of gas components on the solid-phase content are demonstrated by phase diagrams. The study puts the accent on the influence of oxygen content in gas environment on processes of thermal decomposition of FeSO4·H2O and FeSO4. At three quantities of oxygen content—0% (100% Ar), 21% (dry air) and 100% (pure O2) the processes of oxidation and formatting metastable iron sulphates were examined by several experimental techniques. The thermal decomposition of samples was investigated by TG–DTG–DTA method in the temperature range 293–1400 K. Partial pressure of water vapour was determined by the quantity of water released from dehydration process of FeSO4·H2O. Infrared spectroscopy, Mössbauer spectroscopy and X-Ray powder diffraction method were used for identification of the new formed solid structures and for characterization of the content of the iron sulphates with different valencies of iron. The experimental data and their analyses give the possibility to determine the different stages of decomposition, related to the formation of intermediates. Depending on gas environment, the basic relationships for reaction kinetics is drawn. It is demonstrated on that correlation exists between the kinetic’s parameters and the content of oxygen in the gas phase.
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Zboril R, Mashlan M, Papaefthymiou V, Hadjipanayis G. Thermal decomposition of Fe2(SO4)3: demonstration of Fe2O3 polymorphism. J Radioanal Nucl Chem. 2003;255(3):413–7.
Zboril R, Mashlan M, Petridis D. Polymorphous exhibitions of iron (III) oxide during isothermal oxidative decompositions of iron salts: a key role of the powder layer thickness. Chem Mater. 2002;14(3):969–82.
Solc Z, Trojan M, Brandova D, Kuchler M. A study of thermal preparation of iron (III) pigments by means of thermal analysis methods. J Therm Anal. 1988;3(2):463–9.
Šulcová P, Trojan M. Thermal synthesis and properties of the (Bi2O3)1–x (Ho2O3) x pigments. J Therm Anal Calorim. 2006;83(3):557–9.
Šulcová P, Trojan M. Thermal analysis of pigments based on Bi2O3. J Therm Anal Calorim. 2006;84(3):737–40.
Luxová J, Trojan M, Šulcová P. Application of mechanical activation for the synthesis of the pigment ZnFe2O4 with the spinel structure. Acta Metall Slovaca. 2005;11:437–49.
Mesíková Ž, Šulcová P, Trojan M. Yellow pigments based on Fe2TiO5 and TiO2. J Therm Anal Calorim. 2006;83(3):561–3.
Mesíková Ž, Šulcová P, Trojan M. Preparation and practical application of spinel pigment Co0.46Zn0.55(Ti0.064Cr0.91)2O4. J Therm Anal Calorim. 2006;84(3):733–6.
Zboril R, Mashlan M, Petridis D, Krausova D, Pikal P. The role of intermediates in the process of red ferric pigment manufacture from FeSO4.7H2O. Hyperfine Interact. 2002;139(1-4):437–45.
Kennedy T, Sturman BT. The oxidation of iron (II) sulphide. J Therm Anal. 1975;8:329–37.
Almeida C, Giannetti B. Comparative study of electrochemical and thermal oxidation of pyrite. J Solid State Electrochem. 2002;6:111–8.
Ferrow EA, Mannerstrand M, Berg B. Reaction kinetics and oxidation mechanisms of the conversion of pyrite to ferrous sulphate: a Mössbauer spectroscopy study. Hyperfine Interact. 2005;163:109–19.
Guilin Hu, Dam-Johansen Kim, Wede Stig, Peter Hansen Jens. Decomposition and oxidation of pyrite. Prog Energy Combust Sci. 2006;2:295–314.
Huiping Hu, Chen Qiyuan, Yin Zhoulan, Zhang Pingmin. Thermal behaviors of mechanically activated pyrites by thermogravimetry. Thermochim Acta. 2003;398:233–40.
Usher CR, JrCA Cleveland, Strongin DR, Schoonen MA. Origin of oxygen in sulphate during pyrite oxidation with water and dissolved oxygen: an in situ horizontal attenuated total reflectance infrared spectroscopy isotope study. Environ Sci Technol. 2004;38(21):5604–6.
Frost Ray L, Palmer Sara J, Kristóf J, Horváth E. Dynamic and controlled rate thermal analysis of halotrichite. J Therm Anal Calorim. 2010;99:501–7.
Navrotsky Al, Lázár Forray F, Drouet Ch. Jarosite stability on Mars. Icarus. 2005;176:250–3.
Pelovski Y, Petkova V, Nikolov S. Study of the mechanism of the thermochemical decomposition of ferrous sulphate monohydrate. Thermochim Acta. 1996;274:273–80.
Pelovski Y, Petkova V. Mechanism and kinetics of inorganic sulphates decomposition. J Therm Anal. 1997;49:1227–41.
Petkova V, Pelovski Y. Investigation on the thermal properties of Fe2O(SO4)2: part I. J Therm Anal Calorim. 2001;64:1025–35.
Petkova V, Pelovski Y. Investigation on the Thermal Properties of Fe2O(SO4)2: part II. J Therm Anal Calorim. 2001;64:1037–44.
Petkova V, Pelovski Y. Comparative DSC study on thermal decomposition of iron sulphates. J Therm Anal Calorim. 2008;93(3):847–52.
Krumm S. WINFIT 1.0.A computer program for X-ray diffraction line profile analysis. XIII Conference on Clay Mineralogy and Petrology. Acta Univ Carol Geol. 1994;38:253–61.
Kraus W, Nolze G. PowderCell—a program to visualize crystal structures, calculate the corresponding powder patterns and refine experimental curves. J Appl Cryst. 1996;29:301–3.
Powder Diffraction File Alphabetical Index, JCPDS, International Centre for Diffraction Data, Pennsylvania 19073–3273, sets 1–51:2001.
Nakamoto K. Infrared spectra of the inorganic and coordination compounds. 3rd ed. New York: Wiley; 1977. p. 153–4.
Masset P, Poinso JY, Poignet JC. TG/DTA/MS study of the thermal decomposition of FeSO4·6H2O. J Therm Anal Calorim. 2006;83(2):457–62.
Broun ME, Dollimor D, Galwey AK. Reaction in the solid state. Amsterdam, Oxford, New York: Elsevier; 1980.
Scordari F. Crystal chemical implications on some alkali hydrated sulphates. Tsch Mineral Petrogr Mitt. 1981;28(3):207–22.
Scordari F, Ventruti G, Gualtieri Alessandro F. The structure of metahohmannite, Fe2 3+[O(SO4)2].4H2O, by in situ synchrotron. Am Mineral. 2004;89:365–70.
Ventruti G, Scordari F, Schingaro E, Gualtieri AF, Meneghini C. The order-disorder character of FeOHSO4 obtained from the thermal decomposition of metahohmannite, Fe2 3+(H2O)4[O(SO4)2]. Am Mineral. 2005;90(4):679–86.
Majzlan J, Navrotsky Al, Blainemccleskey R, ChN Alpers. Thermodynamic properties and crystal structure refinement of ferricopiapite, coquimbite, rhomboclase, and Fe2(SO4)3(H2O)5. Eur J Mineral. 2006;18:175–86.
Majzlan J, Navrotsky Al, Schwertmann U. Thermodynamics of iron oxides: part III. Enthalpies of formation and stability of ferrihydrite (~Fe(OH)3), schwertmannite (~FeO(OH)3/4(SO4)1/8), and ε-Fe2O3. Geochim Cosmochim Acta. 2004;68(5):1049–59.
Tõnsuaadu K, Gruselle M, Villain F, Thouvenot R, Peld M, Mikli V, Traksmaa R, Gredin P, Carrier X, Salles L. A new glance at ruthenium sorption mechanism on hydroxy, carbonate, and fluor apatites: analytical and structural studies. J Colloid Interface Sci. 2006;304(2):283–91.
Sherina Peroos, Zhimei Du, de Leeuw NH. A computer modelling study of the uptake, structure and distribution of carbonate defects in hydroxy-apatite. Biomaterials. 2006;27(9):2150–61.
Tônsuaadu K, Peld M, Leskelä T, Mannonen R, Niinistö L, Veiderma M. A thermoanalytical study of synthetic carbonate-containing apatites. Thermochim Acta. 1995;256(1):55–65.
Wiria FE, Leong KF, Chua CK, Liu Y. Poly-ε-caprolactone/hydroxyapatite for tissue engineering scaffold fabrication via selective laser sintering. Acta Biomater. 2007;3(1):1–12.
Jokanović V, Jokanović B, Marković D, Živojinović V, Pašalić S, Izvonar D, Plavšić M. Kinetics and sintering mechanisms of hydro-thermally obtained hydroxyapatite. Mater Chem Phys. 2008;111(1):180–5.
Bianco A, Cacciotti I, Lombardi M, Montanaro L. Si-substituted hydroxyapatite nanopowders: synthesis, thermal stability and sinterability. Mater Res Bull. 2009;44(2):345–54.
He QJ, Huang ZL, Cheng XK, Yu J. Thermal stability of porous A-type carbonated hydroxyapatite spheres. Mater Lett. 2008;62(3):539–42.
Lafon JP, Champion E, Bernache-Assollant D, Gibert R, Danna AM. Thermal decomposition of carbonated calcium phosphate apatites. J Therm Anal Calorim. 2003;72:1127–34.
Kannan S, Ventura JMG, Ferreira JMF. Synthesis and thermal stability of potassium substituted hydroxyapatites and hydroxyapatite/β-tricalciumphosphate mixtures. Ceram Int. 2007;33(8):1489–94.
Stoyanov V. Rheological characteristics of cement pastes, determined by rotational viscometers. In: Proceedings of the X-th international conference on mechanics and technology of composite materials, vol 15–17, Sofia, Bulgaria, September; 2003. pp. 213–8.
Ivanov Ya., Stoyanov V, Kotsilkova R. Rheological estimation of methods for concrete design. In: Proceedings of the XIII-th international congress on rheology, vol 20–25, Cambridge, UK, August; 2000. pp. 205–7.
Ivanov Ya, Yanovsky Yu, Stoyanov V, Karnet Yu, On the influence of interface layers on the properties of polymer nanocomposites, In: Proceedings of the III-rd National Seminar on Nanotechnology, Sofia, Bulgaria, November 30—December 1, 2001, Nanoscience & Nanotechnology ‘02, Balabanova E and Dragieva I editors, Sofia: Heron Press; 2002. pp. 107–9.
Lajmi B, Hidouri M, Wattiaux A, Fournés L, Darriet J, Ben Amara M. Crystal structure, Mössbauer spectroscopy, and magnetic properties of a new potassium iron oxyphosphate K11Fe15(PO4)18O related to the Langbeinite-like compounds. J Alloys Compd. 2003;361(1–2):77–83.
Hibino T, Yasumasa Y, Katsunori K, Atsumu T. Decarbonation behavior of Mg–Al–CO3 hydrotalcite-like compounds during heat treatment. Clays Clay Miner. 1995;43(4):427–32.
Petrova N, Mizota T, Fujiwara K. Hydration heats of zeolites for evaluation as heat exchangers. J Therm Anal Calorim. 2001;64:157.
Mizota T, Petrova N, Nakayama N. Entropy of zeolitic water. J Therm Anal Calorim. 2001;64:211–7.
Stanimirova Ts, Petrova N. DTA and TG study of minerals from the hydrotalcite–takovite isomorphic series: II. Influence of M2+/M3+ cation ratio. Compt Rend Acad Bulg Sci. 1999;52(11-12):59–62.
Stanimirova Ts, Piperov N, Petrova N, Kirov G. Thermal evolution of Mg–Al–CO3 hydrotalcites. Clay Miner. 2004;39(2):177–91.
Petrova N, Mizota T, Stanimirova Ts, Kirov G. Sorption of water vapor on a low-temperature hydrotalcite metaphase: calorimetric study. Microporous Mesoporous Mater. 2003;63(1-3):139–45.
Stanimirova Ts, Vergilov I, Kirov G, Petrova N. Thermal decomposition products of hydrotalcite-like compounds: low-temperature metaphases. J Mater Sci. 1999;34(17):4153–61.
Holgado MJ, Labajos FM, Montero MJS, Rives V. Thermal decomposition of Mg/V hydrotalcites and catalytic performance of the products in oxidative dehydrogenation reactions. Mater Res Bull. 2003;38:1879–91.
Stoyanov V. A concept of the rheological behaviour of suspensions, In: Progress and trends in rheology, Emri I editor, In: Proceedings of the V-th European Rheology Conference, Slovenia, Portoroz; 1998. pp. 597–598.
Yörükoğulları E, Yilmaz G, Dikmen S. Thermal treatment of zeolitic tuff. J Therm Anal Calorim. 2010;100(3):925–8.
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Authors gratefully acknowledge the financial support of this study by the Bulgarian National Scientific Research Fund by contract DRNF02/10.
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Petkova, V., Pelovski, Y., Paneva, D. et al. Influence of gas media on the thermal decomposition of second valence iron sulphates. J Therm Anal Calorim 105, 793–803 (2011). https://doi.org/10.1007/s10973-010-1242-6
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DOI: https://doi.org/10.1007/s10973-010-1242-6