Physico-chemical nanomaterials science

Adsorption of cationic dye onto biocarbons: Kinetics and thermodynamic study
Bazan-Wozniak A.
Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
E-mail: aleksandra.bazan@amu.edu.pl

The rapid growth of the worldwide dye business has resulted in significant environmental issues, particularly water contamination. This industry released untreated waste containing synthetic organic dyes with high concentrations into the water sources. Organic dyes change the appearance and color of water. Moreover, some of them are recognized to be carcinogenic and mutagenic for humans and marine creatures. Organic dyes, due to their the vast diversity of their chemo-physical and structural properties, is a big challenge and no stand-alone method is able to decolorize dye wastewater completely. Nonetheless, adsorption is the most frequent method for dye removal because of its low cost, high efficiency, simplicity and absence of by-products [1,2].
The main objective was to develop low cost and effective adsorbent from residue after supercritical extraction raspberry seed to eliminate rhodamine B from water solution. Different experimental parameters like contact time, pH, and solution concentration were investigated to identify their effects on adsorption process. Additionally, different isothermal models such as Freundlich and Langmuir models were analyzed with adsorption data to understand the adsorption process. Adsorption kinetics was studied by fitting data of interparticle pseudo–first–order, and second–order kinetic models. Finally, thermodynamics of the sorption process was carried out to understand the practical applicability of the adsorbent for wastewater treatment from liquid pollutants.

1.	Bazan-Wozniak A., Pietrzak R. Adsorption of organic and inorganic pollutants on activated bio-carbons prepared by chemical activation of residues of supercritical extraction of raw plants // Chem Eng J.-2020.-393.-P. 124785.
2.	Przybyl J., Bazan-Wozniak A., Nosal-Wiercinska A., Pietrzak R. Membranes obtained on the basis of cellulose acetate and their use in removal of phenol from liquid phase // Physicochem Probl Miner Process. 2022.-58(2).-P. 144174.