Adsorption studies of Toluidine Blue from aqueous solutions onto gypsum

M. A. Rauf, Shahnaz M. Qadri, Sarmadia Ashraf, Karima M. Al-Mansoori

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)

Abstract

Gypsum was investigated as an inexpensive and efficient adsorbent to remove Toluidine Blue from aqueous solution. The adsorption studies were carried out at room temperature. Batch mode experiments were conducted at 25 °C to study the effects of pH and initial concentration of Toluidine Blue. The adsorption data was analyzed by using the Langmuir, Freundlich and Tempkin isotherm models and was found to give better results with respect to Langmuir equation. The maximum monolayer adsorption capacity was found to be 28 mg of the dye per gram of gypsum. The data were also studied in terms of their kinetic behavior and was found to obey the pseudo second order equation.

Original languageEnglish
Pages (from-to)90-95
Number of pages6
JournalChemical Engineering Journal
Volume150
Issue number1
DOIs
Publication statusPublished - Jul 15 2009

Keywords

  • Adsorption
  • Dye
  • Gypsum
  • Kinetics
  • Toluidine Blue

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'Adsorption studies of Toluidine Blue from aqueous solutions onto gypsum'. Together they form a unique fingerprint.

Cite this