Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Studies on the Separation of Uranium from Seawater by Composite Fiber Adsorbents(2)(Characterization of Adsorption-Desorption)

복합재료 섬유흡착제를 이용한 해수로부터 우라늄 분리에 관한 연구(2)(흡-탈착 특성)

  • Hwang, Taek-Seong (Dept. of Chemical Eng., Chungnam National University) ;
  • Park, Jeong-Gi (Dept. of Chemistry Engineering, Korea Advanced Institute of Science and Technology) ;
  • Hong, Seong-Gwon (Dept. of Polymer Eng., College of Engineering, Chungnam National University) ;
  • Sin, Hyeon-Taek (Dept, of Interior, Textile Division, Cheil Indrstries Inc.) ;
  • No, Yeong-Chang (Radiation Processing Project, Korea Atomic Energy Research Institute)
  • 황택성 (충남대학교 화학공학과) ;
  • 박정기 (한국과학기술원 화학공학과) ;
  • 홍성권 (충남대학교 고분자공학과) ;
  • 신현택 (제일모직 직물사업본부) ;
  • 노영창 (한국원자력연구소 방사선가공기술)
  • Published : 1996.08.01
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Abstract

The composite fiber adsorbents containing amidoxime group were prepared and separation properties of uranium ion from seawater were investigated. The amount of uranium adsorption was increased with an increase in adsorption time. When the mole ratio of monomer and comonomer, such as acrylonitrile (AN), tetraethyleneglycol dimethacrylate(TEGMA), and divinylbenzene (DVB), were 1 :0. 1 :0.003, this resin showed the maximum adsorption ability for uranium at a level of pH 8. The amount of uranium adsorption was also increased linearly to one hour with an increase in the content of adsorbent which was added in the composite fiber adsorbents(CFA). The maximum adsorption for uranium of CF A showed at $25^{\circ}C$. Hence, the adsorption ability of CF A for calcium and magnecium ions were increased gradually by the recycling of adsorption and disorption, the adsorption content of their on were 0.3, 0.9mmole/g-adsorbents, respectly. It also showed that the adsorption contents of Ca and \1g ions were much lower than them of uranium. The desorption of uranium on the CF A was carried out , bout 100% within 30min, and the desorption rate of various CF A were equalled.

아미드옥심기와 복합재료 섬유흡착제를 제조하였고 해수로부터 우라늄이온의 분리 특성을 조사하였다. 흡착량은 흡착시간이 증가함에 따라 증가하였고 An:TEGMA:DVB의 몰비가 1:0.1:0.003인 수지가 pH 8 부근에서 최대 흡착능을 나타내었다. 또한 흡착량은 CFA에 첨가한 흡착제의 양이 증가함에 따라 증가하였으며 1시간 까지 선형적으로 증가하였고, $25^{\circ}C$에서 최대흡착량을 나타내었다. 한편 Ca, Mg 이온은 흡-탈착 cycle이 반복될수록 증가하였으며 그양은 각각 0.3, 0.9mmole/g-Ads로 우라늄 이온의 그것보다 매우 낮았다. 흡착된 우라늄 이온의 탈착은 흡착제의 종류에 관계없이 약 30분 이내에 거의 100% 탈착되었다.

Keywords

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