지하수 중 NO3(-)제거를 위한 불균질 GMA-DVB/PE 음이온 교환막의 제조 및 투과 특성

황택성; 이선아; 이면주; Taek Sung Hwang; Sun Ah Lee; Myun Joo Lee

Journal of the Korean Industrial and Engineering Chemistry, Vol.12, No.5, 504-510, August, 2001

Synthesis and Permeation Properties of heterogeneous GMA-DVB/PE Anion Exchange Membranes to Eliminate NO3(-) from Ground Water

황택성 ^†, 이선아, 이면주¹

충남대학교 화학공학과, 대전 305-764
¹한국 원자력 연구소 방사선환경안전연구팀, 대전 305-353

Taek Sung Hwang^†, Sun Ah Lee, and Myun Joo Lee¹

Department of Chemical Engineering, College of Engineering, Chungnam National University, Daejeon 305-764, Korea
¹Radio. Isotop. application team, Korea Atomic Energy Research Institute, Daejon 305-353, Korea

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초록

전기투석 공정으로 지하수 중 질소 성분을 제거하기 위하여 압출법으로 PE를 지지체로 한 glycidyl methacrylate(GMA)계 불균질 음이온교환막을 합성하였다. 이온교환막은 현탁 중합법으로 합성한 glycidylmethacrylate-divinylbenzene(GMA-DVB) 공중합체와 linear low density polyethylene의 배합 비율에 따라 제조하고, 이들의 역학적, 전기화학적 물성을 확인하였다. 여기서 지하수에 공존하는 음이온 중 NO3(-)제거에 가장 방해가 되는 SO4(2-)이 입체적으로 크다는 것에 착안하여 가교제인 DVB의 양을 변화시켜 공중합체를 합성하였다. 막의 역학적 물성을 확인하기 위해 측정한 인장강도와 탄성률은 PE 함량이 높아질수록 증가하였으며, PE가 70 wt%일 때 각각 45.0, 1000 kg/cm(2)으로 최대를 나타냈다. 반면에 함수율 및 고정 이온농도, 이온투과성, 전기저항 등 막의 전기화학적 특성은 막내에 공중합체의 함량이 높아질수록 증가하였다. 한편 막을 이용하여 전기투석에 의한 질소이온 분리시 최적 전류량은 150 mA이었다.

To eliminate nitrate ion in ground water by electrodialysis (ED), heterogeneous ion-exchange glycidyl methacrylate (GMA) membranes were synthesized using linear low density polyethylene (LLDPE) as a the matrix. We prepared the membranes with various ratios of GMA-divinylbenzene (DVB) copolymer and LLDPE contents and investigated their mechanical and electrochemical properties. We observed that SO4(2-) disturb removal of NO3(-) from ground water and the size of NO3(-) is smaller than that of SO4(2-). Thus we synthesized anion exchangers with various DVB contents. The tensile strength and modulus were increased with increasing PE content, and when PE content was 70 wt%, the maximum values appeared at 4.50, 1000 kg/cm(2), respectively. The electrochemical properties such as water uptake, fixed ion concentration, and ion transfer number increased with increasing GMA-DVB copolymer content in the membrane. Also, it was found that the optimal current for separation was 150 mA.

Keywords:heterogeneous ion exchange membranes;glycidylmethacrylate;divinylbenzene;eletrodialysis

[References]

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Huh KS, Suh GD, HWAHAK KONGHAK, 29(1), 63 (1991)
ASTM D638
Dumy MB, Lindheimer A, Gavach C, J. Membr. Sci., 57, 57 (1991)
Simon GP, Calmon C, Desalination, 59, 61 (1986)
Hirata Y, Yamamoto Y, Date M, Yamauchi A, J. Membr. Sci., 41, 177 (1989)
Bauer B, Strathmann H, Effenberger F, Desalination, 79, 125 (1990)
Choi DM, Koo YM, Theor. Appl. Chem. Eng., 1(1), 409 (1995)
Rhee CT, J. Korean Chem. Soc., 18(1), 58 (1974)

[Referenced By]

[Related Articles]

[1] Ogata EN, J. Atom. Energy Soc. Jpn., 10, 672 (1968)

[2] Suzuki M, Fuji T, Tanaka S, Rep. Sprc. Proj. Res. energy, 49, 234 (1987)

[3] Kim SS, Park M, Hur NH, Choi J, Korean J. Environ. Agric., 10, 11 (1991)

[4] Kesore K, Janowski F, Shaposhnik VA, Thesis to the 20th International Conference on Membrane Processes, Anapa, Russia, May (1994)

[5] Kesore K, Janowski F, Shaposhnik VA, J. Membr. Sci., 127(1), 17 (1997)

[6] Leitz FB, Environ. Sci. Technol., 10(2), 136 (1976)

[7] Huang TC, Juang RS, Ind. Eng. Chem. Process Des. Dev., 25, 537 (1986)

[8] Tsuneda S, Saito K, Mitsuhara H, Sugo T, J. Electrochem. Soc., 142, 11 (1995)

[9] Hagazy ESA, El-Rehim HAA, Khalifa NA, Atwa SM, Shawky HA, Polym. Int., 16, 343 (1997)

[10] Belfort G, J. Membr. Sci., 11, 196 (1984)

[11] Oreu Y, Egozy Y, Desalination, 86, 156 (1992)

[12] Molau GE, J. Membr. Sci., 8, 309 (1981)

[13] Huh KS, Suh GD, HWAHAK KONGHAK, 29(1), 63 (1991)

[14] ASTM D638

[15] Dumy MB, Lindheimer A, Gavach C, J. Membr. Sci., 57, 57 (1991)

[16] Simon GP, Calmon C, Desalination, 59, 61 (1986)

[17] Hirata Y, Yamamoto Y, Date M, Yamauchi A, J. Membr. Sci., 41, 177 (1989)

[18] Bauer B, Strathmann H, Effenberger F, Desalination, 79, 125 (1990)

[19] Choi DM, Koo YM, Theor. Appl. Chem. Eng., 1(1), 409 (1995)

[20] Rhee CT, J. Korean Chem. Soc., 18(1), 58 (1974)