Evaluation of the use of raw and activated date pits as potential adsorbents for dye containing waters

Fawzi Banat, Sameer Al-Asheh, Leema Al-Makhadmeh

Research output: Contribution to journalArticlepeer-review

349 Scopus citations

Abstract

The adsorption kinetics and isotherms of methylene blue (MB) on raw and thermally activated date pits, an agricultural solid waste, were investigated. The effects of activation temperature, solution temperature, solution pH, adsorbent particle size, and solution salinity on méthylène blue removal were studied. Dye removal increased with an increase in solution pH but decreased with an increase in solution temperature. Raw date pits were effective in removing MB from aqueous solutions and are a promising adsorbent material. Unexpectedly, it was found that physical activation of date pits reduced the adsorption capacity. The measured adsorption kinetics was well described by a pseudo-second order kinetic model. Furthermore, the Langmuir isotherm model fitted the experimental equilibrium data.

Original languageBritish English
Pages (from-to)193-202
Number of pages10
JournalProcess Biochemistry
Volume39
Issue number2
DOIs
StatePublished - 31 Oct 2003

Keywords

  • Activation
  • Date pits
  • Dyes
  • Kinetic models
  • Langmuir

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