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Copper (II) adsorption from aqueous solution by herbaceous peat.

Recep Gündoğan1, Bilal Acemioğlu, Mehmet Hakki Alma

  • 1Department of Soil Science, Faculty of Agriculture, Kahramanmaras Sütçü Imam University, 46060, K. Maras, Turkey.

Journal of Colloid and Interface Science
|December 5, 2003
PubMed
Summary

Herbaceous peat effectively removes copper (II) ions from water, with optimal removal at lower concentrations. This natural adsorbent shows promise for water purification applications.

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Area of Science:

  • Environmental Science
  • Water Treatment
  • Adsorption Technology

Background:

  • Copper (II) ions are significant water pollutants.
  • Peatlands are natural materials with potential adsorbent properties.
  • Effective removal of heavy metals from aqueous solutions is crucial.

Purpose of the Study:

  • To investigate the use of herbaceous peat from Turkish peatlands as an adsorbent for copper (II) ion removal.
  • To determine the effects of initial concentration, temperature, and pH on copper (II) adsorption.
  • To evaluate the adsorption capacity, kinetics, and mechanism of copper (II) removal by peat.

Main Methods:

  • Adsorption experiments were conducted using herbaceous peat as an adsorbent.
  • Varying initial copper (II) ion concentrations, temperatures, and pH levels were tested.

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  • Adsorption isotherms (Langmuir, Freundlich) and kinetic models (pseudo-second-order) were analyzed.

    • Main Results:

    • Peat effectively removed copper (II) ions, achieving up to 97.04% removal at 3 x 10(-4) M initial concentration, 21°C, and pH 5.5.
    • Adsorption capacity was 4.84 mg/g, and equilibrium was reached in 150 minutes.
    • Adsorption followed Langmuir and Freundlich isotherms, with a pseudo-second-order kinetic model, indicating cation exchange and complexation mechanisms.

    Conclusions:

    • Herbaceous peat is a viable and effective adsorbent for removing copper (II) ions from aqueous solutions.
    • The adsorption process is influenced by initial copper concentration but less so by temperature and pH.
    • The findings support the use of peat for environmental remediation and water purification.