Kinetics and equilibrium sorption studies of 4-nitrophenol on pyrolyzed and activated oil shale residue

Sameer Al-Asheh, Fawzi Banat, Asmahan Masad

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Sorption of the organic pollutant 4-nitrophenol (4-NP) by pyrolyzed and activated Jordanian oil-shale was studied. Pyrolyzed oil shale was prepared using a fluidized bed reactor at 520°C in the presence of nitrogen. Physical activation was carried out by treating the pyrolyzed oil shale with CO 2 at 830°C, while chemical activation was achieved by using KOH and ZnCl2 as impregnating agents. Batch kinetics and isotherm studies were conducted to evaluate the sorption process. Effects of contact time, initial sorbate concentration, sorbent concentration, temperature, pH and inorganic salts (NaCl and KCl) on the sorption process by the different sorbents were considered. Chemically activated oil shale, pretreated with ZnCl 2, gave the highest uptake of 4-NP. The isotherm experimental data fit reasonably well to Langmuir, Freundlich and Redlich-Paterson models. Three kinetic models, namely the Morris-Weber, Lagergren, and Pseudo-Second-Order model (PSOM), were applied to represent the experimental results for both pyrolyzed and ZnCl2-oil shale sorbents.

Original languageBritish English
Pages (from-to)1109-1117
Number of pages9
JournalEnvironmental Geology
Volume45
Issue number8
DOIs
StatePublished - Jun 2004

Keywords

  • 4-Nitrophenol
  • Chemical activation
  • Jordan
  • Oil shale
  • Physical activation

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