Article
  • Preparation and Characterization of Heterogeneous Anion Exchange Membrane for Recovery of Sulfate Ion from Waste Water
  • Choi KJ, Choi JH, Hwang EH, Rhee YW, Hwang TS
  • 폐수 중 황산이온 회수를 위한 불균질 음이온교환막의 제조 및 특성
  • 최국종, 최재환, 황의환, 이영우, 황택성
Abstract
Heterogeneous anion exchange membranes were prepared by compression molding for the recovery of sulfate ion from waste water. The swelling ratio, transport number, and ion exchange capacity of the heterogeneous anion exchange membranes were increased and their electrical resistances were decreased as the amount of ion exchange resin content in the matrix was raised. The tensile strength of the heterogeneous anion exchange membrane was decreased with increasing the amount of ion exchange resin in the LLDPE. The tensile strength for the LDPE heterogeneous membrane containing 30 wt% anion exchange resin showed the highest value. The water content increased with increasing amount of ion exchange resin in the membrane. Moreover the highest transport number of the membrane was 0.86. The electrical resistance of LDPE matrix membrane with 50 wt% resin showed 46.5 Ωㆍcm2. Current efficiency of electrodialysis for sulfate ion showed the highest value at the current density of 125 mA/cm2 in 0.5 mol/L sulfuric acids solution.

본 연구에서는 폐수 중에 함유된 황산이온을 전기투석 방법으로 회수하기 위하여 불균질 음이온교환막을 압출성형 방법으로 제조하였다. 불균질 음이온교환 막의 함수율, 이온교환용량 및 이온수송수는 이온교환 수지의 함량이 증가함에 따라 증가하였고, 전기저항은 감소하였다. 또한 불균질 음이온교환막의 인장강도는 이온교환 수지의 함량이 증가함에 따라 감소하였으며 LLDPE 막의 경우 인장강도는 수지의 함량이 30 wt%일 때 가장 높게 나타났다. 함수율은 이온교환 수지의 함량이 증가함에 따라 증가하였으며, 불균질 이온교환막의 이온수송수는 최대 0.86 이었고, 전기저항 값은 50 wt% 수지 함량의 LDPE 막이 46.5 Ωㆍcm2 로 가장 높게 나타났다. 한편 제조한 막의 황산이온에 대한 전기투석 운전 결과 전류효율은 황산농도 0.5 mol/L, 전류밀도 125 mA/cm2에서 가장 높게 나타났다.

Keywords: heterogeneous ion-exchange membrane; electrodialysis; extrusion; LLDPE; LDPE; ion transport number

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2007; 31(3): 247-254

    Published online May 25, 2007

  • Received on Mar 6, 2007
  • Accepted on Apr 25, 2007