Reduction of COD in refinery wastewater through adsorption on date-pit activated carbon

Muftah H. El-Naas, Sulaiman Al-Zuhair, Manal Abu Alhaija

Research output: Contribution to journalArticlepeer-review

186 Citations (Scopus)


Experiments were carried out to evaluate the batch adsorption of COD from petroleum refinery wastewater on a locally prepared date-pit activated carbon (DP-AC), and its adsorption effectiveness was compared to that of commercially available BDH activated carbon (BDH-AC). Adsorption equilibrium and kinetic data were determined for both adsorbents and fitted to several adsorption isotherm and kinetics models, respectively. The Langmuir monolayer isotherm fitted well the equilibrium data of COD on both adsorbents; whereas, the kinetics data were best fitted by the pseudo-second order model. Modeling of the controlling mechanisms indicated that both intrinsic kinetics and mass transfer contributed to controlling the adsorption process. Mass transfer seemed to be the dominant mechanism at low COD content, while intrinsic kinetics dominates at high concentrations. In general, the adsorption effectiveness of locally prepared DP-AC was proven to be comparable to that of BDH-AC. Therefore, DP-AC can be utilized as an effective and less expensive adsorbent for the reduction of COD in refinery wastewater.

Original languageEnglish
Pages (from-to)750-757
Number of pages8
JournalJournal of Hazardous Materials
Issue number1-3
Publication statusPublished - Jan 15 2010


  • Adsorption
  • COD reduction
  • Controlling mechanism
  • Date-pit
  • Petroleum refinery

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


Dive into the research topics of 'Reduction of COD in refinery wastewater through adsorption on date-pit activated carbon'. Together they form a unique fingerprint.

Cite this