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, vol.22, no.4, pp.1007-1011, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 4
  • Publication Date: 2013
  • Journal Name: POLISH JOURNAL OF ENVIRONMENTAL STUDIES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1007-1011
  • Istanbul University Affiliated: Yes

Abstract

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.