LARHYSS Journal
Volume 21, Numéro 1, Pages 45-67
2024-09-15
Removal Of Azo Toxic Dye From Synthetic Wastewater Using Dry Spearmint Sprigs
Authors : Boudaoud ََasma . Ad Chifaa . Djedid Mebrouk . Guُُermit Mounira . Benalia Mokhtar . Soltani Amel .
Abstract
The main objective of this study was to investigate the mechanism of mеthyl violеt 10B dyе adsorption onto dry sprigs of Spearmint, determine the most suitable kinetic and isothermal models for the adsorption process, and estimate the maximum adsorption capacity for the dye. Experimental results revealed that the optimal adsorption conditions were achieved with an adsorbent mass of 0.01 grams, a pH of 5, and an equilibrium time of 30 minutes. The adsorption capacity of the mеthyl violеt 10B dyе increased with higher initial dye concentrations but decreased as the temperature increased. The pseudo-second-order kinetic model provided the best fit to the experimental data. The Temkin isotherm model demonstrated the best fit, and the maximum adsorption capacity for monolayer adsorption was determined to be 84.83 mg/g. The thermodynamic parameters confirmed that the adsorption process was spontaneous (ΔG°<0), exothermic (ΔH°<0), and exhibited low randomness (ΔS°<0). The adsorbent exhibited promising results, including high mеthyl violеt 10B dyе removal efficiency, low economic cost, and environmental friendliness. These findings suggest that the adsorbent has the potential to serve as a viable alternative for sustainable wastewater treatment
Keywords
Mеthyl violеt 10B dyе ; Sustainable Adsorbent ; Dry Spearmint Sprigs ; Kinetics ; Isotherm ; Thermodynamics.
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