Comparison of optimised isotherm models for basic dye adsorption by kudzu

Stephen Allen, Quan Gan, R. Matthews, P.A. Johnson

Research output: Contribution to journalArticlepeer-review

311 Citations (Scopus)


This study assesses the use of dried (5% w/w moisture) kudzu (Peuraria lobata ohwi) as an adsorbent medium for the removal of two basic dyes, Basic Yellow 21 and Basic Red 22, from aqueous solutions. The extent of adsorption was measured through equilibrium sorption isotherms for the single component systems. Equilibrium was achieved after 21 days. The experimental isotherm data were analysed using Langmuir, Freundlich, Redlich-Peterson, Temkin and Toth isotherm equations. A detailed error analysis was undertaken to investigate the effect of using different error criteria for the determination of the single component isotherm parameters. The performance of the kudzu was compared with an activated carbon (Chemviron F-400). Kudzu was found to be an effective adsorbent for basic dye colour removal, though its capacity for colour removal was not as high as an activated carbon, the potential appeared to exist to use it as an alternative to activated carbon where carbon cost was prohibitive. (C) 2002 Elsevier Science Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)143-152
Number of pages10
JournalBioresource Technology
Issue number2
Publication statusPublished - Jun 2003

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Food Science
  • Process Chemistry and Technology
  • Applied Microbiology and Biotechnology


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