Nature of the reaction of mercury jarosite in NaOH medium
Keywords:
Jarosite, Mercury, Alkaline medium, Decomposition, Kinetic model
Abstract
This paper presents the nature of the decomposition reaction in alkaline medium (NaOH) of mercury jarosite under the following conditions: 0.05 mol L−1 NaOH, 30 °C (303 K) temperature, pH 12.70, d0 38 µm and a magnetic stirring of 500 rpm, the reaction´s development presents an induction period, a progressive conversion period and a stabilization zone. The results obtained by SE E S show the transversal section of a partially decomposed particle formed by an unreacted core, a reaction front and an ash halo which indicates that the reaction takes place by OH ions diffusion from the solution towards the particle through the ash halo, while the SO42 and Hg2+ ions diffuse from the unreacted core towards the solution determining that the kinetic model of the spherical particle of constant size and unreacted core with chemical control is appropriate to describe the reaction progress.
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References
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[3] B. Duo and H. Chen: Removal of toxic mercury (II) from aquatic solutions by synthesized TiO2 nanoparticles. Desalination, 2011, vol. 269, pp. 260 – 265.
[4] Mohamad J. Assari, A. Rezaee and H. Rangkooy: Bone char surface modification by nano – gold coating for elemental mercury vapor removal. Applied Surface Science, 2015, vol. 342, pp. 106 –111.
[5] K. Alonso, A. L. Delgado. and F.A. López: A kinetic study of the thermal decomposition of ammoniojarosite. Journal of Materials Science, 1998, vol. 33, pp. 5821 – 5825.
[6] F. Patiño, I. Reyes, I. Rivera, M. Reyes, J. Hernández and M. Pérez: Decomposition Kinetics of Argentian Lead Jarosite in NaOH Media. Sociedad Química de México, 2011, vol. 55, pp. 208 –
213.
[7] F. Patiño, A. Roca, M. Reyes, M. Cruells, I. Rivera and Leticia. E. Hernández: Kinetic Modeling of the Alkaline Decomposition and Cyanidation of Argentojarosite. Sociedad Química de México, 2010, vol. 54, pp. 216 – 222.
[8] Iván A. Reyes, I. Mireles, F. Patiño, T. Pandiyan, Mizraim U. Flores, Elia G. Palacios, Emmanuel J. Gutiérrez and M. Reyes: A study on the dissolution rates of K – Cr(VI) – jarosites: kinetic analysis and implications. Geochemical Transactions, 2016, vol. 17, pp. 1 – 18.
[9] J. E. Dutrizac and S. Kaiman: Synthesis and properties of jarosite – type compounds. Canadian Mineralogist, 1976, vol. 14, pp. 151 – 158.
[10] I. Mireles, Iván A. Reyes, Víctor H. Flores, F. Patiño, Mizraim U. Flores, M. Reyes, M. Acosta, R. Cruz and Emmanuel J. Gutiérrez: Kinetic Analysis of the Decomposition of the KFe3(SO4)2−x(CrO4)x(OH)6 Jarosite Solid Solution in Ca(OH)2 Medium. Sociedade Brasileira de Química, 2016, vol. 26, pp. 1024 – 1025.
[11] Mizraim U. Flores, F. Patiño, Iván A. Reyes, I. Rivera, M. Reyes and J. Juárez: Kinetic Modeling of the Alkaline Decomposition of Potassium Arsenojarosite. Sociedade Brasileira de Química, 2012, vol. 23, pp. 1018 – 1023.
[12] Iván A. Reyes, F. Patiño, I. Rivera, Mizraim U. Flores, M. Reyes and J. Hernández: Alkaline Reactivity of Arsenical Natrojarosite. Sociedade Brasileira de Química, 2011, vol. 22, pp. 2260 –
2267.
[13] J. E. Dutrizac and T.T Chen: The synthesis of mercury jarosite and the mercury concentration in jarosite – family minerals. Canadian Mineralogist, 1981, vol. 19, pp. 559 – 569.
[14] F. Patiño, Iván A. Reyes, Mizraim U. Flores, T. Pandiyan, A. Roca, M. Reyes and J. Hernández: Kinetic modeling and experimental design of the sodium arsenojarosite decomposition in alkaline media: Implications. Hydrometallurgy, 2013, vol. 137, pp. 115 – 125.
[15] A. Ballester, Luis. F. Verdeja and J. Sancho: Metalurgia extractiva fundamentos, 1 st ed, Síntesis, S.A., Madrid, 2000, pp. 171 - 198.
Published
2016-09-30
How to Cite
Ordoñez, S., Patiño, F., Flores, M. U., Reyes, I. A., Reyes, M., Islas, H., & Flores, V. H. (2016). Nature of the reaction of mercury jarosite in NaOH medium. Tópicos De Investigación En Ciencias De La Tierra Y Materiales, 3(3), 96-102. https://doi.org/10.29057/aactm.v3i3.9613
Section
Articles
