Competitive adsorption of ternary dye mixture using pine cone powder modified with β-cyclodextrin

Sushanta Debnath, Niladri Ballav, Arjun Maity, Kriveshini Pillay

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

The adsorption characteristics for the uptake of a ternary dye mixture safranine O, brilliant green and methylene blue (SO, BG and MB) by pine cone modified with β-cyclodextrin (CD) were investigated. The adsorption process primarily followed a pseudo - second order model and the rate of adsorption was inversely proportional to the initial dye concentration. The adsorption was also a multi-stage process which was limited by intraparticle diffusion. The adsorption predominately followed the Langmuir isotherm and was controlled by physisorption and electrostatic interactions. The adsorption was spontaneous and endothermic in nature. The order of performance of adsorption of the dyes was BG > SO > MB at all temperatures studied. The adsorption of BG was therefore highly favoured at all temperatures.

Original languageEnglish
Pages (from-to)679-688
Number of pages10
JournalJournal of Molecular Liquids
Volume225
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Competitive adsorption
  • Pine cone
  • Ternary dye mixture
  • β-cyclodextrin

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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