Fabrication of Multi-functionalized Graphene Oxide Doped Alginate Hybrid Spheres for Enhanced Fluoride Adsorption

Abstract

In this present investigation, amine functionalized graphene oxide (AGO) doped on alginate (Alg) polymeric matrix gives AGO@Alg hybrid spheres was developed to explore its potential towards fluoride retention. The vital characterization techniques namely FTIR, TGA, SEM and XPS analysis of AGO@Alg hybrid spheres were acquired to identify its physicochemical properties. The liable parameters for fluoride adsorption onto AGO@Alg hybrid spheres were optimized in a batch mode to attain enhance defluoridation capacity (DC).The prepared AGO@Alg hybrid spheres follow the electrostatic interaction mechanism on defluoridation. The adsorption isotherms (Fruendlich, Langmuir, Temkin and Dubinin-Radushkevich (D-R) models), kinetics (reaction and diffusion based models) and thermodynamic parameters (ΔS°, ΔG° and ΔH°) were surveyed at 303, 313 and 323 K. To lessen the costeffectiveness of AGO@Alg hybrid spheres the recyclability test was conducted. The aptness of AGO@Alg hybrid spheres was also scrutinized for the fluoride contaminated field sample collected from fluoride endemic village.

Microfabrication of covalent organic framework-based magnetic bio-ceramic beads for defluoridation of water

“…2a). 35 The characteristic gelatin bands were noticed at 1646, 1462, and 1243 cm −1 , expressing the existence of various amide groups (I, II and III) such as CN (stretching vibration), CO, NH (bending vibration), and C–N (stretching vibration), respectively (Fig. 2a).…”

Defluoridation using hydroxyapatite implanted lanthanum organic framework-based bio-hybrid beads

“…2a). 52,53 The significant bands belonging to alginate were noticed at 1030, 1414, 1600 and 3347 cm −1 , attributed to C-O-C group stretching vibration, COO − stretching vibration of carboxylate group, OH stretching vibration and OH stretching mode, respectively (cf. Fig.…”

Graphene-Based Adsorbents for Arsenic, Fluoride, and Chromium Adsorption: Synthesis Methods Review

“…In recent years, great efforts have been made to study GO-based materials with different functionalizations that have a higher fluorine adsorption capacity in aqueous systems [65][66][67][68][69]. Recently, some non-ferric adsorbent materials have been developed such as the one developed by Xu et al [70].…”

“…The use of hydrogels for the encapsulation of GO-based functionalized materials has enabled the development of materials with great potential for water defluorination [67][68][69]. He et al [64] proposed a material that consists of a hydrogel of sodium alginate and GO with a Yttrium basis Y-GO-SA1.0 through the sol-gel for the elimination of fluoride.…”