Ciprofloxacin adsorption from aqueous solution onto chemically prepared carbon from date palm leaflets

El Said Ibrahim El-Shafey*, Haider Al-Lawati, Asmaa Soliman Al-Sumri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

183 Citations (SciVal)


A chemically prepared carbon was synthesized from date palm leaflets via sulphuric acid carbonization at 160°C. Adsorption of ciprofloxacin (CIP) from aqueous solution was investigated in terms of time, pH, concentration, temperature and adsorbent status (wet and dry). The equilibrium time was found to be 48 hr. The adsorption rate was enhanced by raising the temperature for both adsorbents, with adsorption data fitting a pseudo second-order model well. The activation energy, Ea, was found to be 17 kJ/mol, indicating a diffusion-controlled, physical adsorption process. The maximum adsorption was found at initial pH 6. The wet adsorbent showed faster removal with higher uptake than the dry adsorbent, with increased performance as temperature increased (25-45°C). The equilibrium data were found to fit the Langmuir model better than the Freundlich model. The thermodynamic parameters showed that the adsorption process is spontaneous and endothermic. The adsorption mechanism is mainly related to cation exchange and hydrogen bonding.

Original languageEnglish
Pages (from-to)1579-1586
Number of pages8
JournalJournal of Environmental Sciences (China)
Issue number9
Publication statusPublished - Sept 2012


  • Adsorption
  • Carbon
  • Ciprofloxacin
  • Palm leaflets

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Environmental Science(all)


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