Investigation of copper adsorption on natural and microwave-treated bentonite




modified clays, microwave radiation, wastewater purification, adsorption modeling, non-linear modeling.


The research studied the removal of copper ions from simulated wastewater by adsorption on natural and simulated with microwave electromagnetic radiation bentonite (EMR-stimulated bentonite). X-ray diffraction was employed to study the structure of the natural bentonite, which was proved to contain hydromica, montmorillonite, quartz, and chlorite. The maximal removal rates of Cu2+ were 20.5 % and 29.1 % for natural and EMR-stimulated bentonite, respectively.

The experimental data of copper adsorption were fitted with theoretical isotherms (Langmuir, Freundlich, Redlich-Peterson, Toth, and Langmuir-Freundlich) using non-linear modeling. The adsorption on natural bentonite followed the Langmuir model, while the Langmuir-Freundlich model fitted the adsorption on EMR-stimulated bentonite. The isotherms were used to calculate the maximal adsorption capacities, which were 11.82 and 25.74 mg/g for natural and EMR-stimulated adsorbents, respectively. The electromagnetic treatment stimulated the formation of the new adsorption sites, improved the pores structure, and influenced the surface charge. The specific adsorption and surface precipitation were involved in the adsorption on EMR-stimulated adsorbent

Author Biographies

Andriy Kontsur, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007

Postgraduate student

Department of Environmental Safety

Leonid Sysa, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007


Department of Environmental Safety

Marianna Petrova, Lviv State University of Life Safety Kleparivska str., 35, Lviv, Ukraine, 79007


Department of Environmental Safety


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How to Cite

Kontsur, A., Sysa, L., & Petrova, M. (2017). Investigation of copper adsorption on natural and microwave-treated bentonite. Eastern-European Journal of Enterprise Technologies, 6(6 (90), 26–32.



Technology organic and inorganic substances