OPTIMIZATION OF CONDITIONS FOR ADSORPTION OF HEAVY METAL IONS FROM WATER WITH ENVIRONMENTALLY FRIENDLY SORBENT-BASED ON ELDER TREE CORE
Zlate Veličković, Zoran Bajić, Radovan Karkalić, Kristina Meić, Miloš Nikolić, Vanja Gujaničić, Aleksandar Marinković
Pages: 35-53
Published: 16 Nov 2022
Views: 445
Downloads: 57
Abstract: Pollution of water by heavy metals is one of the greatest global problems of mankind. Trends in sustainable production and green technologies lead to a reduction in pollution on the one hand, but the increase in living standards and population growth inevitably affect greater resource utilization. Thus, the higher goods production and the increase of the environmental pollution, amongst it water, is unavoidable. In this study, we investigated the possibility of using a new environmentally friendly adsorbent based on elder tree core, Sambucus nigra - (mSN), for the removal of heavy metal ions from water (Pb2+, Cd2+). The obtained adsorbent was characterized and tested for the removal of Pb2+ and Cd2+ cations from water. The adsorption process depends on a large number of variable factors (adsorption conditions), pH value, adsorbent dose, initial concentration, contact time and temperature. These factors do not have a one-sided effect on adsorption, but are correlated with each other, oppose each other or act synergistically on the adsorption process itself. In order to obtain the maximum utilization of the adsorbent, the optimization of the adsorption conditions was performed using the Response Surface Method (RSM). The results of adsorption experiments on the removal of Pb2+ and Cd2+ cations from water at 298, 308 and 318 K were compared with isothermal models Langmuir, Freundlich, Dubinin- Radushkevich (DR) and Temkin, as well as for modeling adsorption kinetics using pseudo-first order, pseudo-second order and Elovich's kinetic models. The results showed that the adsorption of Pb2+ and Cd2+ from water on the mSN adsorbent followed the pseudo-second kinetic model and the Freundlich isothermal model. Thermodynamic parameters indicate the endothermic, feasible and spontaneous nature of the adsorption process.
Keywords: heavy metals, water, adsorbent, elder tree core, optimization
Cite this article: Zlate Veličković, Zoran Bajić, Radovan Karkalić, Kristina Meić, Miloš Nikolić, Vanja Gujaničić, Aleksandar Marinković. OPTIMIZATION OF CONDITIONS FOR ADSORPTION OF HEAVY METAL IONS FROM WATER WITH ENVIRONMENTALLY FRIENDLY SORBENT-BASED ON ELDER TREE CORE. Journal of International Scientific Publications: Materials, Methods & Technologies 16, 35-53 (2022). https://www.scientific-publications.net/en/article/1002506/
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