Electrospun nanofiber chitosan/polyvinyl alcohol loaded with metal organic framework nanofiber for efficient adsorption and removal of industrial dyes from waste water: Adsorption isotherm, kinetic, thermodynamic, and optimization via Box-Behnken design.

Dyes can seriously harm human health because they linger or break down in the environment and find their way into drinking water through the water cycle. Examples of the most important interactions between MOFs and dyes are provided, and an effort is made to comprehend how surface charge and size compatibility affect the adsorption process. The methods for incorporating functionalized Ce-MOF into electrospun nanofibers made of polyvinyl alcohol and chitosan to create functionalized cerium metal organic framework nanofiber membranes (FCCP nanofiber membranes) are presented in this paper. A number of techniques, including XRD, FT-IR, N adsorption/desorption isotherm, SEM mapping, and EDX, were used to successfully manufacture and analyze the adsorbent. Examine the effects of pH, adsorbent dose, starting concentration, contact time, and thermodynamics on the adsorption process of malachite green dye (MG) onto FCCP nanofiber membrane. The Langmuir and pseudo-second-order adsorption processes were fitted. The adsorption process was chemisorption, as shown by the adsorption energy of 31.6 kJ/mol. Examine the adsorption mechanism, which may involve electrostatic interaction, pore filling, and π-π interaction. The increase in MG dye absorption at higher temperatures suggests an endothermic and spontaneous adsorption process. For the MG dye solution, the ideal adsorption parameters were determined using the Box-Behnken design software to be pH 8, a dosage of 0.2 g of FCCP nanofiber membrane per 25 mL, and an adsorption capacity of 359.2 mg/g. These elements are necessary for the composite sponge to be utilized in water purification processes and to be the most successful at adsorbing arsenate. Applying the Box-Behnken design and response surface approach features of the Design-Expert software successfully enhanced the adsorption process with a small number of planned tests. The stability of the adsorbent was confirmed by an investigation of its reusability using six consecutive cycles of adsorption and desorption, which revealed no appreciable drop in removal effectiveness. It also demonstrated consistent efficiency, preserved homogeneous XRD data, and kept its original chemical composition both before and after reuse.