Removal of arsenic from aqueous solution by novel iron and iron–zirconium modified activated carbon derived from chemical carbonization of Tectona grandis sawdust: Isotherm, kinetic, thermodynamic and breakthrough curve modelling

Sahu, Naincy; Singh, Jiwan; Koduru, Janardhan Reddy

doi:10.1016/j.envres.2021.111431

Cited by 42 publications

(17 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the addition of metal oxides and hydroxyl groups on the surface of the material and the increase in active sites, the adsorption capacity of ZIC to Sb( v ) is greatly improved compared with unmodified activated carbon. 12 When the molar ratios of iron to zirconium ions in the ZIC were 1 : 1, 1 : 3 and 1 : 5, the removal rates of Sb( v ) were 77.11%, 61.49% and 56.4%, respectively. The surface of zirconia has a special pore structure, which is favourable to the diffusion of Sb( v ) in the pores.…”

Section: Resultsmentioning

confidence: 96%

“…This shows that the nanoparticles are successfully loaded on the surface of the activated carbon and distributed evenly, which reduces the reunion phenomenon. 12 Moreover, some particles enter the pores of activated carbon, which has stronger adhesion and does not easily fall off, which makes the ZIC nanocomposite material stable.…”

Section: Resultsmentioning

confidence: 99%

“…It may be that the original crystal structure of activated carbon is destroyed by the loading of zirconium iron binary oxide, or the necessary conditions for the formation of activated carbon crystal are destroyed. 12 Since the amorphous sample has larger pores, smaller structure and more adsorption sites, the pollutant ions in the solution can diffuse to the surface of the composite material and the voids more quickly, thereby contributing to the adsorption of antimony ions. 16,17 By comparing and analysing with the JCPDS card, it can be seen that the characteristic peaks of γ-Fe 2 O 3 and Fe 3 O 4 are displayed at a 2 θ of 35.6°, 54.1°, 57.4° and 62.9°, 18 and ZrO 2 at a 2 θ of 30.1°, 33.2° and 50.2°.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of nano-zirconium-iron oxide supported by activated carbon composite for the removal of Sb(v) in aqueous solution

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of nano-zirconium-iron oxide supported by activated carbon composite for the removal of Sb(v) in aqueous solution

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A piece of NCMs of known weight (≈1 g) was immersed in 50 mL of the arsenic solution under stirring for 6 h. Afterward, the final arsenic concentration was quantified, and the adsorption capacity in each point calculated considering the weight of the nanocomposite membrane was calculated considering the nanocomposite membrane weight. The isotherm curves were fitted to the following models: Langmuir, [ 57 ] Freundlich, [ 58 ] Temkin, [ 59 ] Dubinin–Radushkevich, [ 60 ] and Halsey, [ 61 ] which were defined by Equations ()–(), respectively

\begin{matrix} q_{normale} = \frac{Q_{\max} b C_{normale}}{1 + b C_{normale}} \end{matrix}

\begin{matrix} q_{normale} = K_{normalF} C_{normale}^{1 / n} \end{matrix}

\begin{matrix} q_{normale} = \frac{R T}{b_{T}} \ln (K_{T} C_{e}) \end{matrix}

\begin{matrix} q_{normale} = Q_{normalS} {exp}^{(- B_{normalD} ε^{2})} \end{matrix}

\begin{matrix} ε = R T \ln (1 + \frac{1}{C_{normale}}) \end{matrix}

\begin{matrix} q_{normale} = K_{normalH} C_{normale}^{1 / n} \end{matrix}

where q e (mg g −1 ) is the As adsorption capacity at a given equilibrium concentration, C e (mg L −1 ) is the arsenic equilibrium...…”

Section: Methodsmentioning

confidence: 99%

Reusable Nanocomposite Membranes for Highly Efficient Arsenite and Arsenate Dual Removal from Water

Salazar

Martins

Valverde

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

Nanocomposite membranes (NCMs) of poly(vinylidene fluoride‐hexafluoropropylene), PVDF‐HFP, with different yttrium carbonate and magnetite loadings, are prepared, and their dual adsorption capacity over neutral arsenite and anionic arsenate species is evaluated. The nanoparticles (NPs) and the corresponding NCMs are fully characterized in morphology, microstructure, thermal, and surface properties. The nanocomposite membranes present a micrometric porous structure with a homogeneous distribution of the active nanoparticles. Chemical, thermal, and water‐contact angle characteristics of the NCMs point out that they maintain the chemical and thermal stability of the polymer while improving the wettability. Arsenic removal depends on NP loading and pH of the media. For instance, efficiencies close to 100% are achieved for arsenate species under acidic conditions, while adsorption capacity over arsenite is also incremented above 80%. Fe3O4/PVDF‐HFP nanocomposite shows a dual affinity for the adsorption of As(III) and As(V) species, with the maximum adsorption capacities of 92.82 and 137.08 mg g−1, respectively. In addition, both NCMs are easily activated and reused without significant efficiency loss. Consequently, the nanocomposite membranes represent low‐cost, reusable, and efficient water remediation systems suitable for the long‐term removal of As(III) and As(V) under conditions mimicking real polluted surface and groundwater.

show abstract

“… 12 − 19 Among these options, adsorption is one of the efficient techniques for the removal of As from contaminated water as this technique is simple, cost-effective, and produces less waste products. 20 − 22 Various adsorbents such as clay, modified clay, and clay supported nano zero valent iron (nZVI), 23 − 26 alumina, 27 − 29 activated carbon, 30 − 32 graphene, 33 and biochar (BC) 34 − 36 have been used to remove As from contaminated waters.…”

Section: Introductionmentioning

confidence: 99%

Adsorption–Desorption Behavior of Arsenate Using Single and Binary Iron-Modified Biochars: Thermodynamics and Redox Transformation

et al. 2022

View full text Add to dashboard Cite

Arsenic (As) is a dangerous contaminant in drinking water which displays cogent health risks to humans. Effective clean-up approaches must be developed. However, the knowledge of adsorption–desorption behavior of As on modified biochars is limited. In this study, the adsorption–desorption behavior of arsenate (As V ) by single iron (Fe) and binary zirconium–iron (Zr–Fe)-modified biosolid biochars (BSBC) was investigated. For this purpose, BSBC was modified using Fe-chips (FeBSBC), Fe-salt (FeCl 3 BSBC), and Zr–Fe-salt (Zr–FeCl 3 BSBC) to determine the adsorption–desorption behavior of As V using a range of techniques. X-ray photoelectron spectroscopy results revealed the partial reduction of pentavalent As V to the more toxic trivalent As III form by FeCl 3 BSBC and Zr–FeCl 3 BSBC, which was not observed with FeBSBC. The Langmuir maximum As V adsorption capacities were achieved as 27.4, 29.77, and 67.28 mg/g when treated with FeBSBC (at pH 5), FeCl 3 BSBC (at pH 5), and Zr–FeCl 3 BSBC (at pH 6), respectively, using 2 g/L biochar density and 22 ± 0.5 °C. Co-existing anions reduced the As V removal efficiency in the order PO 4 3– > CO 3 2– > SO 4 2– > Cl – > NO 3 – , although no significant inhibitory effects were observed with cations like Na + , K + , Mg 2+ , Ca 2+ , and Al 3+ . The positive correlation of As V adsorption capacity with temperature demonstrated that the endothermic process and the negative value of Gibbs free energy increased (−14.95 to −12.47 kJ/mol) with increasing temperature (277 to 313 K), indicating spontaneous reactions. Desorption and regeneration showed that recycled Fe-chips, Fe-salt, and Zr–Fe-salt-coated biochars can be utilized for the effective removal of As V up to six-repeated cycles.

show abstract

Removal of arsenic from aqueous solution by novel iron and iron–zirconium modified activated carbon derived from chemical carbonization of Tectona grandis sawdust: Isotherm, kinetic, thermodynamic and breakthrough curve modelling

Cited by 42 publications

References 56 publications

Synthesis of nano-zirconium-iron oxide supported by activated carbon composite for the removal of Sb(v) in aqueous solution

Synthesis of nano-zirconium-iron oxide supported by activated carbon composite for the removal of Sb(v) in aqueous solution

Reusable Nanocomposite Membranes for Highly Efficient Arsenite and Arsenate Dual Removal from Water

Adsorption–Desorption Behavior of Arsenate Using Single and Binary Iron-Modified Biochars: Thermodynamics and Redox Transformation

Contact Info

Product

Resources

About