The Mixed-Bed Ion Exchange Performance and Temperature Effects at Ultra-Low Concentrations - 2.Temperature Effects -

초저이온 농도범위에서 혼합층 이온교환능과 온도의 영향 - 2. 온도의 영향 -

  • Yoon, Tae Kyung (Department of Chemical Engineering, Dongeui University) ;
  • Noh, Byeong Il (Department of Chemical Engineering, Dongseo University) ;
  • Lee, Chang Won (Department of Chemical Engineering, Dongeui University) ;
  • Moon, Byung Hyun (Department of Environmental Engineering, Changwon National University) ;
  • Lee, Gang Choon (Oriental Chemical Industries, Research Center) ;
  • Jo, Myung Chan (Department of Chemical Engineering, Dongseo University)
  • 윤태경 (동의대학교 화학공학과) ;
  • 노병일 (동서대학교 화학공학전공) ;
  • 이창원 (동의대학교 화학공학과) ;
  • 문병현 (창원대학교 환경공학과) ;
  • 이강춘 (동양화학 중앙연구소) ;
  • 조명찬 (동서대학교 화학공학전공)
  • Received : 1998.07.27
  • Accepted : 1998.11.20
  • Published : 1999.04.10

Abstract

Mixed-bed ion exchange performance was studied experimentally with variations of cation to anion resin ratio, resin weight and temperature at ultralow sodium chloride solution concentrations of less than $1.0{\times}10^{-4}M$. Analyzing the effluent concentration histories the performance test was examined as a function of tested solution volume for a laboratory-scale continuous flow column until both the cation and anion-exchange resins were exhausted. Initial leakage was observed for both cation and anion breakthrough curves, but serious at cation breakthrough curve because of low selectivity coefficient. The slope of breakthrough curve was affected by selectivity coefficient and temperature. The slope of anion breakthrough curve was steep because of the large selectivity coefficient, and ion exchange rates increased as temperature increased. The temperature effect decreased as the total volume was increased or as the resins were exhausted.

Keywords

Mixed Bed;Ion Exchange;Selectivity Coefficient;Ultralow Concentrations;Temperature Effect

Acknowledgement

Supported by : 한국학술진흥재단

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