Adsorptive performance of nanosized zero‐valent iron for V(V) removal from aqueous solutions

Abstract

BACKGROUND Vanadium is included in the USEPA Contaminant Candidate List. It is an essential dietary mineral but it becomes toxic at high concentrations causing health problems. In this study, nanosized zero‐valent iron (nZVI) was synthesized and the applicability of the sorbent was investigated for the removal of V(V) in water samples. RESULTS The synthesized sorbent is characterized by scanning electron microscopy‐energy dispersive X‐ray spectroscopy, thermo gravimetric and Brunauer–Emmett–Teller surface area analysis. Particle size and zeta potential measurements of the sorbent were also elucidated. Batch type adsorption experiments were performed using inductively coupled plasma mass spectrometry and the effects on the adsorption of V(V) of pH, sorbent amount, contact time, initial concentration and temperature were investigated. Langmuir isotherm model was found to characterize the uptake of V(V) by nZVI and the sorption kinetics fitted better with the pseudo‐second‐order model. The proposed method was applied for the removal of V(V) ion in real water samples and quantitative results (>85%) were obtained. CONCLUSION nZVI has demonstrated its potential use for the removal of V(V) ions in aqueous solutions. The sorbent warrants an evaluation of a scale up procedure in water remediation studies with the advantages of having a high adsorption capacity, ease of preparation and being environmentally friendly. © 2017 Society of Chemical Industry

Utilization of ferric groundwater treatment residuals for inorganic-organic hybrid biosorbent preparation and its use for vanadium removal

“…This suggests that on the surface, vanadium was bound by surface hydroxyl groups without a change in oxidation state change. A similar result was reported for the vanadium adsorption onto nanosized zero-valent iron [43]. It was proposed that vanadium(V) ions were bound to the outer shell of the iron sorbent via surface complexation [43].…”

“…A similar result was reported for the vanadium adsorption onto nanosized zero-valent iron [43]. It was proposed that vanadium(V) ions were bound to the outer shell of the iron sorbent via surface complexation [43]. The surface physical parameters of raw peat and Fe-GWTR-P3 are shown in Table 3.…”

Application of Polycarboxylic Acid Brushes on Polystyrene–Divinylbenzene Microbeads for the Removal of Lead from Water

“…The amount of Pb(II) adsorbed, q (mg g −1 ), was calculated using Equation (1). [ 26 ] The influence of adsorption parameters viz., pH (2–8), contact time (5–180 min), sorbent amount (2.5–30.0 mg) and temperature (298–343 K) were examined, and the optimum adsorption conditions were determined where W (g) is the weight of sorbent in the solution, C i and C e (mg L −1 ) are initial and equilibrium concentrations of Pb(II) ions and V (L) is the volume of the solution.…”

“…Moreover, K F is the Freundlich's constant (mg g −1 ) and n F is a dimensionless number in this model (Equation (3)). [ 26 ] The D – R isotherm model assumes that the ionic species preferentially bind to most energetically favorable sites of sorbent associated with multilayer adsorption of ions. The D – R isotherm model is generally described by Equations (4–6).…”

Removal of Phthalic Acid and Isophthalic Acid From Aqueous Solution by Anion Exchange Resin

“…The mean free energy E (kJ mol -1 ) of sorption can be estimated by using β values as expressed in the following Eqn. 5 -7 [16,17] ( 5 )…”