The Potentiometric Titration Curves on Ammonia Absorption of Carboxylic Ion Exchanger

카르복실 이온교환수지의 암모니아 흡착에 대한 전위차 적정곡선

  • Kim, T.I. (Department of Chemical Engineering, Chungnam National University) ;
  • Son, W.K. (Department of Polymer Science & Engineering, Chungnam National University)
  • 김태일 (충남대학교 화학공학공학과) ;
  • 손원근 (충남대학교 고분자공학과)
  • Received : 1999.04.13
  • Accepted : 1999.09.14
  • Published : 1999.11.10

Abstract

In this work, we studied the degree of hydrolysis of ion exchanger in $NH_4OH$ solution and sorption characteristics of $NH_3$ by potentiometric titration curves with using carboxylic acid ion exchanger Fiban K-4. We knew that the theoretical pH values agreed with the experimental pH values on the $NH_4OH$ concentrations in various concentrations of supporting electrolyte $(NH_4)_2SO_4$. The sorption values of $NH_3$ using the ion exchanger can be calculated from equivalent sorption curves for various pH. Also, the degree of hydrolysis increased with decreasing concentration of supporting electrolyte and pH. In order to obtain the mono ion form below 0.01 M as the decreasing concentration of supporting electrolyte, the pH values should be increased. From these results, therefore, the concentrations of supporting electrolyte and pH values were determined.

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