Browse > Article

A Study on Process Performances of Continuous Electrodeionization with a Bipolar Membrane for Water Softening and Electric Regeneration  

Moon, Seung-Hyeon (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Hong, Min-Kyoung (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Han, Sang-Don (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Lee, Hong-Joo (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Publication Information
Membrane Journal / v.17, no.3, 2007 , pp. 210-218 More about this Journal
Abstract
CEDI-BPM(Continuous Electrodeionization-Bipolar Membrane) has advantages due to high ion permselectivity through ion exchange membranes and the production of $H^+$ and $OH^-$ ions on the bipolar membrane surfaces for regeneration of ion exchange resin during electrodeionization operation. In this study, hardness materials were removed by the CEDI-BPM without scale formation and the ion exchange resins were electrically regenerated during the operation. The adsorption characteristic of ion exchange resin surface, the influence of flow rate on the hardness removal and electric regeneration were investigated in the study. The removal efficiency of Ca was higher than that of Mg in the CEDI-BPM, which was related to the high adsorption capacity of Ca on the cation exchange resin. With increasing flow rate, the flux of Ca and Mg was enhanced by the permselectivity of a cation exchange membrane. In the electric regeneration of CEDI-BPM, it was shown that the regeneration efficiency was higher with a lower regeneration potential applied between cathode and anode.
Keywords
electrodeionieation; bipolar membrane; electric regeneration; ion exchange resin; adsorption;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 J. S. Park, J. H. Song, K. H. Yeon, and S. H. Moon, 'Removal of hardness ions from tap water using electromembrane processes', Desalination, 202, 1 (2007)   DOI   ScienceOn
2 M. S. Kang, Y. J. Choi, H. J. Lee, and S. H. Moon, 'Effects of inorganic substances on water splitting in ion exchange membranes', J.Colloid Interface Sci., 273, 523 (2004)   DOI   ScienceOn
3 J. S. Park, 'A study on removal of hardness materials from tap water and ground water using EDR and EDIR processes', M.S. thesis, Gwangju Institute of Science and Technology (GIST), Gwangju (2005)
4 B. A. Bolto and L. Pawlowski, 'Wastewater treatment by ion-exchange', pp. 212-219, E.&F.N. Spon, New York (1987)
5 J. H. Song, K. H. Yeon, and S. H. Moon, 'Migration phenomena of $Ni^{2+}$ through a cation exchange textile (CIET) in a continuous electrodeionization (CEDI)', Membrane Journal, 16, 77 (2006)   과학기술학회마을
6 E. Pehlivan and T. Altun, 'The study of various parameters affecting the ion exchange of $Cu^{2+}$, $Zn^{2+}$, $Ni^{2+}$, $Cd^{2+}$, and $Pb^{2+}$ from aqueous solution on Dowex 50W synthetic resin', J. Hazard. Mater. B134, 149 (2006)
7 H. Strathmann, 'Ion-exchange membrane separation processes', pp. 279-282, Elsevier, Amsterdam (2004)
8 A. Grabowsk, G. Zhang, H. Strathmann, and G. Eigenberger, 'The production of high purity water by continuous electrodeionization with bipolar membranes : Influence of the anion-exchange membrane permselectivity', J. Membrane Sci., 281, 297 (2006)   DOI   ScienceOn
9 J. H. Song and S. H. Moon, 'Principles and current technologies of continuous deionization', Membrane Journal, 16, 167 (2006)   과학기술학회마을
10 J. H. Song, K. H. Yeon, and S. H. Moon, 'Transport characteristics of $Co^{2+}$ through an ion exchange textile in a continuous electrodeionization (CEDI) system under electro-regeneration', Sep. Sci. Technol., 39, 3601 (2004)   DOI   ScienceOn
11 A. Demirbas, E. Pehlivan, F. Gode, T. Altun, and G. Arslan, 'Adsorption of Cu(II), Zn(II), Ni(II), Pb(II), and Cd(II) from aqueous solution on Amberlite IR-120 synthetic resin', J.Colloid Interface Sci., 282, 20 (2005)   DOI   ScienceOn
12 A. Dey and G. Thomas, 'Electronics grade water preparation', Tall Oaks, Littleton (2003)