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Effects of Temperature on A Synthesized Birnessite

온도 변화에 따른 합성 버네사이트 특성 변화 연구

  • Received : 2013.06.03
  • Accepted : 2013.06.24
  • Published : 2013.06.30

Abstract

A series of birnessite was synthesized at 25, 40, 60, and $80^{\circ}C$, respectively. Intensities of XRD and the ratio of signal to noise of the peaks for samples increases with increasing temperature up to $60^{\circ}C$, whereas the intensity and ratio for a sample synthesized at $80^{\circ}C$ decrease, showing that crystallinity of the birnessite synthesized at $60^{\circ}C$ is better than that of the synthesized at $80^{\circ}C$. However, BET surface areas for these two samples show that the surface area increases 39.4 to 89.7 $m^2/g$ with increasing synthesizing temperature from 60 up to $80^{\circ}C$, indicating that a small surface area is shown in a well-crystallized birnessite rather than that of a poorly crystallized birnessite. SEM images show that morphologies for samples are seriously influenced by temperature. The morphology of the synthesized at 25 shows a round-shape, while a plate-like morphology is shown in the synthesized birnessite at $80^{\circ}C$. In addition, a porous layered structure is also shown in the synthesized birnessite at $80^{\circ}C$. These results suggest that physicochemical properties of the synthesized birnessite are sensitively affected by mechanical changes of parameters such as temperature during the synthesization.

Keywords

birnessite;manganese oxide;crystallinity;BET surface area;porous layered structure

References

  1. Ma, Y., Luo, J., and Suib, S.L. (1999) Syntheses of birnessites using alcohols as reducing reagents: Effect of synthesis parameters on the formation of birnessite, Chemistry of Materials, 11, 1972-1979. https://doi.org/10.1021/cm980399e
  2. Manceau, A., Drits, V. A., Silvester, E. J., Bartoli, C., and Lanson, B. (1997) Structural mechanism of $Co^{2+}$ oxidation by the phyllomanganate buserite, American Mineralogist, 82, 1150-1175.
  3. Manceau, A., Lanson, B., Schlegel, M.L., Harge, J.C., Musso, M., Eybert-Berard, L., Hazemann, J.-L., Chateigner, D., and Lamble, G.M. (2000) Chemical forms of trace metals in soils by XAFS spectroscopy. I. Quantitative Zn speciation in smelter-contaminated soils, American Journal of Science, 300, 289-343. https://doi.org/10.2475/ajs.300.4.289
  4. McKenzie. R.M. (1971) The Synthesis of birnessite, cryptomelane, and some other oxides and hydroxides of manganese, Mineralogical Magazine, 38, 493-502. https://doi.org/10.1180/minmag.1971.038.296.12
  5. Silverster, E., Manceau, A., and Drits, V.A. (1997) Structure of synthetic monoclinic Na-rich birnessite and hexagonal birnesskte: II. Results from chemical studies and EXAFS spectroscopy, American Mineralogist, 82, 962-978.
  6. Stumm, W. (1992) Chemistry of the solid-water interface and particle-water interface in natural systems, Wiley, New York., 428 p.
  7. Taylor, R.M., McKenzie, R.M., and Norrish, K. (1964) The mineralogy and chemistry of manganese in some Australian soils, Australian Journal of Soil Research, 2, 235-248. https://doi.org/10.1071/SR9640235
  8. Wang, M.C. and Huang, P.M. (1992) Significance of Mn(IV) oxide in the abiotic ring cleavage of pyrogallol in natural environments, Science of the Total Environment, 11, 147-157.
  9. Burns, R.G. and Burns, V.M. (1977) The mineralogy and crystal chemistry of deep-sea manganese nodules, a polymetallic resource of the twenty-first century. Philosophical Transactions of the Royal Society of London (A), 286, 283-301. https://doi.org/10.1098/rsta.1977.0118
  10. Burns, V.M. and Burns, R.G. (1978) Post-depositional metal enrichment processes inside manganese nodules from the North Equatorial Pacific Ocean, Earth & Planetary Science Letters, 39, 341-348. https://doi.org/10.1016/0012-821X(78)90020-1
  11. Chorover, J. and Amistadi, M.K. (2001) Reaction of forest floor organic matter at goethite, birnessite and smectite surfaces, Geochimica et Cosmochimica Acta, 65, 95-109. https://doi.org/10.1016/S0016-7037(00)00511-1
  12. Chunkhrov, F.K. and Gorshkov, A.I. (1981) Iron and manganese oxide minerals in soils, Transactions of the Rayal Society of Edinburgh: Earth Sciences, 72, 195-200. https://doi.org/10.1017/S0263593300009998
  13. Feng X.H., Zhai L.M., Tan, W.H., Liu, F., and He, J.Z. (2007) Adsorption and redox reactions of heavy metals on synthesized Mn oxide minerals, Environmental Pollution, 147, 366-373. https://doi.org/10.1016/j.envpol.2006.05.028
  14. Gaillot, A., Lanson, B., and Drits V.A. (2005) Structure of birnessite obtained from decomposition of permanagante under soft hydrothermal conditions. 1. Chemical and structural evolution as a function of temperature, Chemistry of Materials, 17, 2959-2975. https://doi.org/10.1021/cm0500152
  15. Glover, E.D. (1977) Characterization of a marine birnessite, American Mineralogist, 62, 278-285.
  16. Luo, J. and Suib, S.L. (1997) Proparative parameters, magnesium effects, and anion effects in the cyrstallinzation of birnessite, The Journal of Physical Chemistry, 101, 10403-10413. https://doi.org/10.1021/jp9720449
  17. Luo, J., Huang, A., Park, S.H., Suib, S.L., and O'Young C. (1998) Crystallization of sodium-birnessite and accompanied phase transformation, Chemistry of Materials, 10, 1561-1568. https://doi.org/10.1021/cm970745c

Acknowledgement

Supported by : 한국연구재단