25℃에서 ZnSO4-Fe2(SO4)3-Na2SO4-H2SO4-NaOH-H2O계에 대해 Pitzer식과 Vasil'ev식에 의한 이온평형해석 비교

Comparison of Ionic Equilibria Analysis of ZnSO4-Fe2(SO4)3-Na2SO4-H2SO4-NaOH-H2O System at 25℃ between Pitzer and Vasil'ev Equation

  • Lee, Man-Seung (Department of Advanced Materials Science & Eng., Mokpo National University) ;
  • Lee, Kyoung-Ju (Department of Advanced Materials Science & Eng., Mokpo National University) ;
  • Nam, Sang-Ho (Department of Chemistry, Mokpo National University)
  • 투고 : 2003.01.08
  • 심사 : 2003.03.31
  • 발행 : 2003.04.25

초록

아연산화광 황산침출액에 적용가능한 이온평형모델을 개발하기 위해 Vasil'ev식과 Pitzer식에 의한 해석방법을 비교하였다. 이온강도가 9 m정도로 증가할수록 Vasil'ev식보다는 Pitzer식에 의한 용액의 이온평형결과가 정확하였다. 아연산화광 황산침출액을 모사하기위해 $25^{\circ}C$에서 $ZnSO_4-Fe_2(SO_4)_3-Na_2SO_4-H_2SO_4-NaOH-H_2O$계에 대해 전해질의 농도를 변화시키며 혼합한 용액의 pH 측정값과 본 연구에서 계산한 pH값은 서로 잘 일치하였다.

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