DOI QR코드

DOI QR Code

Equilibrium Property of Ion Exchange Resin for Silica Removal at Ultralow Concentration

초저이온농도에서 이온교환수지에 의한 실리카제거 평형특성

  • Yoon, Tae-Kyung (Department of Environmental Engineering, Dongeui University) ;
  • Lee, Gang-Choon (Department of Environmental Engineering, Dongeui University) ;
  • Noh, Byeong-Il (Department of Advanced Material Engineering, Dongseo University)
  • 윤태경 (동의대학교 환경공학과/산업기술개발연구소) ;
  • 이강춘 (동의대학교 환경공학과/산업기술개발연구소) ;
  • 노병일 (동서대학교 응용생명공학부 신소재공학)
  • Published : 2007.08.31

Abstract

Ion exchange resin was used to remove silica ion at ultralow concentration. The effects of temperature, type of ion exchange resin and single/mixed-resin systems on removal efficiency were estimated. As temperature increased, the slope of concentration profile became stiff, and the equilibrium concentration was higher. In the single resin system, the removal of silica was continued up to 400 min, but the silica concentration was recovered to initial concentration after 400 min due to the effect of dissolved $CO_2$. In the mixed-resin system it took about 600 min to reach equilibrium. Because of faster cation exchange reaction than anion exchange reaction, the effect of $CO_2$ could be removed. Based on the experimental results carried out in the mixed-resin system, the selectivity coefficients of silica ion for each ion exchange resin were calculated at some specific temperatures. The temperature dependency of the selectivity coefficient was expressed by the equation of Kraus-Raridon type.

Keywords

Ion exchange resin;Mixed-bed ion exchange;Silica removal;Selectivity coefficient;Equilibrium property

References

  1. 한국지하수토양환경학회, 2001, 토양환경공학, 향문사, 22pp
  2. Sawyer C. N., McCarty P. L., Parkin G. F., 1994, Chemistry for environmental engineering, 4th Ed., McGraw-Hill Inc., 480pp
  3. Yoon T. K., Noh B. I., Moon B. H., 2000, Parametric studies on the performance of cation exchange for the ammonium removal, Korean Journal of Chemical Engineering, 17(6), 652-658 https://doi.org/10.1007/BF02699113
  4. Iler R. K., 1979, The Chemistry of Silica, A Wiley Interscience Publication, NY, 22pp
  5. Haub C. E., Foutch G. L., 1986, Mixed-bed ion exchange at concentration approaching the dissociation of water. 2. Column model applications, Industrial and Engineering Chemistry Fundamentals, 25(3), 381-385 https://doi.org/10.1021/i100023a013
  6. Haub C. E., Foutch G. L., 1986, Mixed-bed ion exchange at concentration approaching the dissociation of water. 1. Model development, Industrial and Engineering Chemistry Fundamentals, 25(3), 373-380 https://doi.org/10.1021/i100023a012
  7. Kraus K. A., Raridon R. J., 1959, Temperature dependence of some cation exchange equilibria in the range 0 to $200^{\circ}C$, Journal of Physical Chemistry, 63, 1901 https://doi.org/10.1021/j150581a026

Cited by

  1. Recovery of Tin from Waste Tin Plating Solution by Ion Exchange Resin vol.24, pp.3, 2015, https://doi.org/10.7844/kirr.2015.24.3.51