Biosorption Behaviour of an Arid Land Plant, Euphorbia Rigida, Towards to Heavy Metals: Equilibrium, Kinetic and Thermodynamic Studies

  • Murat Kilic Anadolu University, Department of Chemical Engineering, Eskişehir, TURKEY http://orcid.org/0000-0002-7141-2075
  • Gamzenur Ozsin Bilecik Şeyh Edebali University, Department of Chemical and Process Engineering, Bilecik, TURKEY http://orcid.org/0000-0001-5091-5485
  • Esin Apaydin-Varol Anadolu University, Department of Chemical Engineering, Eskişehir, TURKEY
  • Ayşe Eren Putun Anadolu University, Department of Chemical Engineering, Eskişehir, TURKEY http://orcid.org/0000-0002-2933-9804

Abstract

The potential of an arid-land plant, Euphorbia rigida (E. rigida), for the removal of heavy metals [Pb(II), Zn(II), Cu(II), Cd(II), Ni(II)] from aqueous solutions was studied in the current work. Batch sorption experiments were conducted to investigate the effects of pH, particle size, initial metal ion concentration, contact time and temperature. Besides, biosorption data was analysed by different isotherm and kinetic models. Equilibrium studies showed that the biosorption closely follows the Langmuir and Freundlich isotherms. From the kinetic point of view, pseudo-second order model gave the best fitting with the experimental results. The evaluated thermodynamic parameters showed that biosorption onto E. rigida was a feasible, spontaneous and endothermic process. The affinities of metal ions onto E. rigida decreased as Pb(II) > Zn(II) > Cd(II) > Cu(II) > Ni(II) in single metal biosorption. Besides, binary and ternary metal sorption studies were conducted to investigate the co-ion effect. Experimental results showed that E. rigida can be used as an alternative and effective low cost biosorbent for the removal of heavy metals from aqueous solutions.

Keywords:

Euphorbia rigida; Single-multi heavy metal biosorption; Equilibrium; Kinetics; Thermodynamics

DOI: 10.17350/HJSE19030000056

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Research Article

Author Biographies

Murat Kilic, Anadolu University, Department of Chemical Engineering, Eskişehir, TURKEY

Chemical Engineering Assist. Prof. Dr.

Gamzenur Ozsin, Bilecik Şeyh Edebali University, Department of Chemical and Process Engineering, Bilecik, TURKEY

Chemical Engineering Reseach Assistant Dr.

Esin Apaydin-Varol, Anadolu University, Department of Chemical Engineering, Eskişehir, TURKEY

Chemical Engineering Assoc. Prof. Dr.

Ayşe Eren Putun, Anadolu University, Department of Chemical Engineering, Eskişehir, TURKEY

Chemical Engineering Prof. Dr. (Emeritus)

Published
2017-10-17
Section
ENGINEERING