Investigation on the Performance of Sweet Lemon Peel Ash as Natural Adsorbent for the Removal of Basic Blue 41 Dye from Aqueous Solutions: Kinetics and Equilibrium Studies
نویسندگان
1 Department of Analytical Chemistry, Faculty of Chemistry, University of Guilan, Namjoo Street, P.O. Box: 1914-41335, Rasht, Iran
2 Department of Analytical Chemistry, Faculty of Chemistry, University of Guilan, Namjoo Street, P.O. Box: 1914-41335, Rasht, Iran
3 Department of Analytical Chemistry, Faculty of Chemistry, University of Guilan, Namjoo Street, P.O. Box: 1914-41335, Rasht, Iran
4 Department of Analytical Chemistry, Faculty of Chemistry, University of Guilan, Namjoo Street, P.O. Box: 1914-41335, Rasht, Iran
5 Department of Chemical Engineering, Lamerd Higher Education Center, Shiraz University of Technology, Fars, Lamerd, Iran
doi
10.22036/abcr.2025.500038.2267چکیده
In this study, sweet lemon peel ash (SLPA) as a natural, green, cost-effective, simple and rapid sorbent was prepared to remove basic blue 41 (BB41) dye from aqueous solutions. The synthesized adsorbent was characterized using different techniques such as scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Inductivity coupled plasma atomic emission spectroscopy (ICP-AES).The effective factors on the adsorption process of BB41 on SLPA was investigated simultaneously using the combination of central composite design and response surface methodology, resulted in the following optimal condition: 0.06 g of adsorbent, 6.04 of pH, 40 ppm of the dye concentration and 20 min of removal time. At this optimal condition, kinetic and equilibrium studies were investigated and the results reveal that the kinetic process obeyed pseudo-second-order model with 0.0227 g. mg-1. min-1 of rate constant. And the adsorption isotherm was well-fitted by Freundlich model suggesting chemisorption mechanism for adsorption of the dye on SLPA. Finally, this proposed adsorbent was applied for the removal of BB41 in two different real water samples, resulted in more than 90% of the removal percentage of the dye.
