Effective defluoridation using lanthanum-organic frameworks encapsulated hydrotalcite based bio-hybrid beads

Herein, hydrotalcite (HT) integrated lanthanum-metal organic frameworks (LaMOFs) cross-linked alginate and chitosan (Alg-CS) biopolymers that are HT-LaMOFs@Alg-CS beads was prepared and successfully utilized for defluoridation investigations. The prepared HT-LaMOFs@Alg-CS beads were evaluated with the help of various instrument analyses. The adsorption capacity of the prepared HT-LaMOFs@Alg-CS beads for fluoride retention was investigated, across a broad choice of pH levels, and in the occurrence of interfering ions identified in water. The batch optimized condition for fluoride adsorption using HT-LaMOFs@Alg-CS beads were contact time (30 min), pH 7, initial fluoride concentration (10 mg/L), dosage (0.1 g) at room temperature. The fluoride adsorption capacity of HT-LaMOFs@Alg-CS beads is 4905 mgF− kg−1 within 20 min. To distinguish the defluoridation behavior on HT-LaMOFs@Alg-CS bio-hybrid beads, the adsorption isotherm, kinetics, and thermodynamic studies were performed. Thermodynamic results suggest that the fluoride adsorption route on the developed HT-LaMOFs@Alg-CS beads was endothermic process with spontaneous nature. The experimental data result of HT-LaMOFs@Alg-CS bio-hybrid beads for fluoride removal was majorly fitted Langmuir isotherm and pseudo-second-order kinetics. The reusability and real water sample examination results of the attained HT-LaMOFs@Alg-CS hybrid beads for defluoridation was demonstrated that the prepared HT-LaMOFs@Alg-CS beads were regenerable nature with more fitting at field level.