Journal of the Iranian Chemical Society

, Volume 14, Issue 3, pp 521–530 | Cite as

Sorption separation of Eu and As from single-component systems by Fe-modified biochar: kinetic and equilibrium study

  • Vladimír Frišták
  • Barbora Micháleková-Richveisová
  • Eva Víglašová
  • Libor Ďuriška
  • Michal Galamboš
  • Eduardo Moreno-Jimenéz
  • Martin Pipíška
  • Gerhard Soja
Original Paper


The utilization of carbonaceous materials in separation processes of radionuclides, heavy metals and metalloids represents a burning issue in environmental and waste management. The main objective of this study was to characterize the effect of chemical modification of corncob-derived biochar by Fe-impregnations on sorption efficiency of Eu and As as a model compounds of cationic lanthanides and anionic metalloids. The biochar sample produced in slow pyrolysis process at 500 °C before (BC) and after (IBC) impregnation process was characterized by elemental, FTIR, SEM-EDX analysis to confirm the effectiveness of Fe-impregnation process. The basic physico-chemical properties showed differences in surface area and pH values of BC- and IBC-derived sorbents. Sorption processes of Eu and As by BC and IBC were characterized as a time- and initial concentration of sorbate-dependent processes. The sorption equilibrium was reached for both sorbates in 24 h of contact time. Batch equilibrium experiments revealed the increased maximum sorption capacities (Q max) of IBC for As about more than 20 times (Q max BC 0.11 and Q max IBC 2.26 mg g−1). Our study confirmed negligible effect of Fe-impregnation on sorption capacity of biochar for Eu (Q max BC 0.89 and Q max IBC 0.98 mg g−1). The iron-impregnation of biochar-derived sorbents can be utilized as a valuable treatment method to produce stable and more effective sorption materials for various xenobiotics separation from liquid wastes and aqueous solutions.


Biochar Fe-impregnation Sorption Separation Eu As 



This work was supported by Austrian BMWFW-OeAD-ICM GmbH and Slovak Research and Development Agency under a Project No. SK 02/2016 (IZOCHAR). Part of work was performed within the frame of mobility programme (Ernst Mach Stipendium) supported by Austrian BMWFW-OeAD and Slovak Research and Development Operational Programme (ERDF:26220120014).


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Copyright information

© Iranian Chemical Society 2016

Authors and Affiliations

  • Vladimír Frišták
    • 1
  • Barbora Micháleková-Richveisová
    • 2
  • Eva Víglašová
    • 3
  • Libor Ďuriška
    • 4
  • Michal Galamboš
    • 3
  • Eduardo Moreno-Jimenéz
    • 5
  • Martin Pipíška
    • 2
  • Gerhard Soja
    • 1
  1. 1.Energy Department, Environmental Resources and TechnologiesAustrian Institute of Technology GmbHTullnAustria
  2. 2.Department of ChemistryTrnava UniversityTrnavaSlovak Republic
  3. 3.Department of Inorganic Chemistry, Faculty of Natural SciencesComenius University in BratislavaMlynská Dolina, BratislavaSlovak Republic
  4. 4.Faculty of Materials Science and Technology in TrnavaSlovak University of Technology in BratislavaTrnavaSlovak Republic
  5. 5.Departamento de Química Agrícola y BromatologíaUniversidad Autónoma de MadridMadridSpain

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