Removal and Recovery of Silica Source from Geothermal Water Recycling System by Calcium Nitrate and Sodium Hydroxide

Shu Qin Bai; Fan Yang; Yuan Wang; Kai Hua Wang

doi:10.4028/www.scientific.net/AMR.516-517.380

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 516-517Removal and Recovery of Silica Source from...

Removal and Recovery of Silica Source from Geothermal Water Recycling System by Calcium Nitrate and Sodium Hydroxide

Abstract:

In order to elucidate the possibility of removal of silicic acid from geothermal water, the calcium nitrate and sodium hydroxide as removing agent was investigated under various conditions. The initial concentration of silicic acid in geothermal water was 412 ppm as Si. The concentration of silicic acid decreased rapidly when the removing agent was added. Precipitation reaction for silicic acid reached equilibrium within 30 minutes and was independent of pH. The removing rate of silicic acid increased with increasing the pH of solution. The high concentration of silicic acid in geothermal water was perfectly removed by addition of calcium nitrate with molar ratio of Ca/Si over 2.1 at pH12. XRD pattern showed that the component of precipitation was calcium silicate hydrate Ca₂SiO₄・nH₂O (CSH).

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Periodical:

Advanced Materials Research (Volumes 516-517)

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380-383

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.516-517.380

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Online since:

May 2012

Authors:

Shu Qin Bai, Fan Yang, Yuan Wang, Kai Hua Wang

Keywords:

CSH, Geothermal Water, Recovery, Remove, Silica

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References

[1] B. Fridleifsson: Renew. Sust. Energ. Rev Vol. 5 (2001), p.299

Google Scholar

[2] Z. J. U. Malley, M. Taeb, T. Matsumoto and H. Takeya: Phys. Chem. Ear, Parts A / B / C Vol. 34 (2009), p.3

Google Scholar

[3] S. G. Öner, N. Kabay, E. Güler, M. Kitis and M. Yüksel: Desalination Vol. 283 (2011), p.10

Google Scholar

[4] K. Hirowatari: Geotherm Vol. 25 (1996), p.259

Google Scholar

[5] D. L. Gallup: Geotherm. Res. Council. Trans Vol. 21 (1997), p.49

Google Scholar

[6] S. Abe: J. Jpn. Geotherm. Energ. Assoc Vol. 34 (1997), p.248

Google Scholar

[7] A. Ketsetzi, A. Stathoulopoulou and K. D. Demadis: Desalination Vol. 223 (2008), p.487

Google Scholar

[8] A. Stathoulopoulou and K. D. Demadis: Desalination Vol. 224 (2008), p.223

Google Scholar

[9] K. D. Demadis, A. Ketsetzi, K. Pachis and V. M. Ramos: Biomacromolecules Vol. 9 (2008), p.3288

Google Scholar

[10] J.G. Webster and D.K. Nordstrom: Geothermal Arsenic, in: A.H. Welch, K.G. Stollenwerk (Eds.), Kluwer Academic Publishers, Dordrecht, (2003), in press

Google Scholar

[11] R. Chrysafi, T. perraki and G. Kakali: J. Eur. Ceram. Soc Vol. 27 (2007), p.1707

Google Scholar

[12] M. Iwamoto, Y. Tanaka, N. Sawamura and S. Namba: J. Am. Chem. Soc Vol. 125 (2003), p.13032

Google Scholar

[13] B. Lee, Y. Kim, H. Lee and J. Yi: Microp. Mesop. Mater Vol. 50 (2001), p.77

Google Scholar

[14] S. Bai and G. Naren: 2011 International Symposium on Water Resource and Environmental Protection, Vol. 4 (2011), p.1455

Google Scholar