Adsorption of Titan Yellow Using Walnut Husks: Thermodynamics, Kinetics and Isotherm Studies

Abstract

The adsorption of Titan Yellow on a natural biosorbent (Walnut Husks) has been investigated.The dye concentration's amount of adsorbent, Ionic strength, touch time and temperature on Titan yellow adsorption activity have been investigated. Under optimal working conditions, walnut husks can remove more than 85.5 % of dye with a 0.06 g dose, with a 15 ppm initial dye concentration and contact time of 20 minutes at 298 K.The (FT-IR) was used to diagnose the walnut husks, The surface's appearance was determined using a scanning electron microscope (SEM).Langmuir, Freundlich, Temkin, Jovanovich, and Halsey adsorption isotherm models are used to interpret the experimental results.The following adsorption isotherm models best fit the evidence, according to the results: Freundlich, Halsey> Langmuir>Temkin>Jovanovich.The thermodynamics showed negative (ΔG,ΔH and ΔS) values, suggesting spontaneous , exothermic, and During the process of adsorption, the solid–solution interface has less randomness.According to the findings of this research, walnut husks could be used as a new low-cost, high-efficiency adsorbent for dye removal from wastewater.