Synchronous Removal of Arsenic and Fluoride from Aqueous Solution: A Facile Approach to Fabricate Novel Functional Metallopolymer Microspheres

Abstract

Concurrence of arsenic (As) and fluoride (F–) ions in groundwater is a serious concern due to their fatal effects. Herein, an attempt was made to fabricate quaternized poly­(zirconyl dimethacrylate-co-vinylbenzyl chloride)] (ZrVBZ), a metallopolymeric microsphere in three-dimensional shape with a porous texture. The synthesized ZrVBZ was utilized for the synchronal removal of As and F– from water. Techniques such as Fourier transform infrared spectroscopy, 13C-nuclear magnetic resonance, scanning electron microscopy, and Brunauer–Emmett–Teller surface area were used to characterize the ZrVBZ. The maximum adsorption capacity of ZrVBZ for both fluoride and arsenic (q max F–: 116.5 mg g–1, q max As­(V): 7.0 mg g–1, and q max As­(III): 6.5 mg g–1) at given experimental conditions (adsorbents’ dose: 0.250 g L–1, feed of F–: 50 mg L–1, As­(V)/As­(III): 2000 μg L–1, and pH: 7.0 ± 0.2) was ascribed to the porous spherical architecture with dual functional sites to facilitate adsorption. The adsorption followed pseudo-second-order kinetics with a correlation coefficient of 0.996, 0.997, and 0.990 for F–, As­(V), and As­(III), respectively. The isotherm data fitted to the Langmuir isotherm model, and the maximum capacity was 121.5, 7.246, and 6.68 mg g–1 for F–, As­(V), and As­(III), respectively. The results of this study indicated that ZrVBZ could be used as an effective adsorbent for the simultaneous removal of F–, As­(V), and As­(III) from an aqueous medium.

Adsorption of arsenic and fluoride: Modeling of single and competitive adsorption systems

“…Henceforth, both adsorption and desorption investigation studies were performed. After the adsorption experiments by As(V) and F, eluting reagents like NaOH, HCl, and distilled water were employed [ 43 ]. The desorption percentage of AC was gauged after each desorption cycle.…”

“…The uptake of As(V) and F was measured. The regeneration studies were carried out for the adsorbed AC utilized in single and binary adsorption of As(V) and F. After the adsorption, the AC was treated with various eluting reagents like 0.1 M NaOH, 0.1 M HCl, and distilled water for desorption studies [ 43 ].…”

Disposable Waste Aluminium Pan Derived Pseudoboehmite Nanoparticles for Concurrent Removal of Fluoride and Arsenate from Aqueous Medium

“…This could be because of higher negative charge of phosphate and formation of stable innersphere complex with the PBN. [50,51] Furthermore, the interference of phosphate is relatively higher in case of arsenate than fluoride which might be due to the structural resemblance of PO 4…”

Optimization of As(V) Removal by Dried Bacterial Biomass: Nonlinear and Linear Regression Analysis for Isotherm and Kinetic Modelling

“…Figure 1b shows that after reaching the optimal concentration, the removal percentage hardly changed. Since there is a finite number of active sites for a certain DBB dose, the absorption rate will naturally decrease as the number of accessible active sites depletes [43,44].…”