Decolorization of Rhodamine B Dye by Hydeogel Nanocomposite: Thermodynamic and Kinetic Studies

Abstract

Rhodamine B is used extensively in textile dyes and agricultural pesticides as fish pests. Hydrogel is a type of sorption technique used as a sorbent. As of now, adsorption is viewed as a cost-effective method that may be used as an alternative to traditional contamination treatment methods. Several techniques were utilized to determine the surface characteristics before and after the adsorption method, like fourier transform infrared (FTIR) and field emission scanning electron microscopy (FESEM) techniques. The effect parameter of the adsorption method was studied, such as the effect of equilibrium time and weight. The data showed that the best removal percentage was (E%=96.546%) and adsorption capacity (188.0 mg/g) in the same order. Thermodynamic factor studies have shown that the reaction is spontaneous, exothermic, and convenient. The sorption isotherm of Rhodamine B onto sodium alginate-g-poly (acrylic acid)/GO composite hydrogel was analyzed utilizing two models First order and second order. The second order was the poorest in a fit of the liner curve and the better.