Optimum Isotherm Parameters for Reactive Azo Dye onto Pistachio Nut Shells: Comparison of Linear and Non-Linear Methods

Armagan B. , Toprak F.

POLISH JOURNAL OF ENVIRONMENTAL STUDIES, cilt.22, sa.4, ss.1007-1011, 2013 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Konu: 4
  • Basım Tarihi: 2013
  • Sayfa Sayıları: ss.1007-1011


Comparison analysis of linear least-square method and non-linear method of three widely used isotherms, Langmuir, Freundlich and Redlich-Peterson were examined to experiment Remazol Red (C.I. 18221) onto pistachionut shell at a solution temperature of 293 K. All the three isotherm equations showed a better fit to the experimental equilibrium data. The results show that the Langmuir model shows the best fit compared to Freundlich and Redlich-Peterson models using linear method. However, when using non-linear method, The Freundlich and Langmuir models show the best fit compared to other. Redlich-Peterson isotherm is a special case of Langmuir isotherm when the Redlich-Peterson isotherm constant g was unity.