17th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings, Volume II) (2024) [K-07-P, pp. 467-470]
AUTHOR(S) / AUTOR(I): T. Radojičić, Marina Maletić 
, Marija Vukčević , Katarina Trivunac
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DOI: 10.46793/Phys.Chem24II.467R
ABSTRACT / SAŽETAK:
Given the substantial waste produced by coal combustion in thermal power plants, including bottom ash and fly ash, it’s imperative to explore novel applications for these by-products. In order to improve the adsorption characteristics of fly ash, chemical modification of fly ash was applied. Unmodified and modified materials were used as adsorbents for yttrium removal from water. Obtained samples were characterized using Fourier transform infrared spectroscopy and scanning electron microscopy. The effect of the initial pH value and concentration of the yttrium solution, as well as contact time on adsorption were examined. It was found that the adsorption of yttrium follows a pseudo-second order kinetic model, while the Freundlich adsorption isotherm best describes the adsorption process in equilibrium. Obtained results demonstrated that alkali-activated fly ash can be used as a highly effective adsorbent for the removal of yttrium from aqueous solutions.
KEYWORDS / KLJUČNE REČI:
ACKNOWLEDGEMENT / PROJEKAT:
This research was funded by the Science Fund of the Republic of Serbia, Program Ideas, GRANT No 7743343, Serbian Industrial Waste towards Sustainable Environment: Resource of Strategic Elements and Removal Agent for Pollutants – SIW4SE.
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